7.3.1 Device Data Path Operation

The DS125DF1610 data path consists of several key blocks as shown in Figure 2. These key circuits are:

• AC-coupled Receiver with Signal Detect
• CTLE
• Cross Point Switch
• DFE with VGA
• CDR
• Differential Driver with FIR Filter

7.3.2 AC-Coupled Receiver with Signal Detect

The differential receiver for each DS125DF1610 channel contains on chip AC coupling capacitors. The minimum bandwidth for this AC coupled receiver is 16kHz. The receiver also contains a signal detect circuit.

The signal detect circuit monitors the energy level on the receiver inputs and powers on or off the rest of the high speed data path if a signal is detected or not. By default, each channel allows the signal detect circuit to automatically power on or off the rest of the high speed data path depending on if a signal is present. The signal detect block can be manually controlled in the SMBus channel registers. This can be useful if it is desired manually force channels to be disabled. For information on how to manually operate the signal detect circuit please see the DS125DF1610 Programming Guide and channel register 0x14 information.

7.3.3 CTLE

The CTLE in the DS125DF1610 is a fully adaptive equalizer with adjustable bandwidth and optional limiting stage. The CTLE adapts according to a Figure of Merit (FOM) calculation during the lock acquisition process. Once the CDR has locked and the CTLE has been adapted, the CTLE boost level will be frozen until a manual re-adapt command is issued or until the CDR re-enters the lock acquisition state. The CTLE is typically re-adapted by resetting the CDR, set and then clear channel register 0x0A[3:2].

The CTLE consists of 4 stages, with each stage having 2-bit boost control. This allows for 256 different stage-boost combinations. The CTLE adaption algorithm allows the CTLE to adapt through 32 of these stage-boost combinations. These 32 stage-boost combinations comprise the EQ Table in the channel registers; see channel registers 0x40 through 0x5F. This EQ Table can be reprogrammed to support up to 32 of the 256 stage-boost settings. Users also have the option of limiting the EQ table length to any value between a minimum value of 1 and a maximum value of 32.

CTLE boost levels are determined by summing the boosts levels of the 4 stages. Different stage-boost combinations that sum to the same number will have approximately the same boost level, but will result in a different shape for the EQ transfer function (boost curve). The boost levels can be set between 0 dB and 31 dB.

The CTLE bandwidth can be adjusted through SMBus control to 3 different levels:

The fourth stage in the CTLE can be programmed through the SMBus interface to become a limiting stage rather than a linear stage. This is useful in some applications, but it should not be typically used in combination with the DFE.

7.3.4 Cross Point Switch

Each quad has a 4x4 non-blocking analog cross point switch. This allows for full switching or broadcasting of data between any input within the quad to any output within the quad. Since the cross point switch is an analog implementation, all of the channels are allowed to operate asynchronously. The analog implementation also minimizes added latency through the device.

As shown in Figure 3, the cross point switch connections for each quad are located between CTLE and DFE in each channel.

The cross point switch consists of 4 sets of MUXs and buffers. In each channel there is a local buffer and a multi-drive buffer. The local buffer transmits data from the CTLE to the DFE of the same channel. The multi drive buffer transmits data from the CTLE to the DFE(s) of other channels within the quad. Each channel has two MUXs:

1. Data path mux – Selects whether to get data from the local buffer or from the other channel’s multi-driver buffer
2. Control bus mux – Selects where the signal detect and EQ control bus should be connected. This setting should mirror the data path mux setting. Note, when an EQ is connected to another channel’s CDR the EQ becomes associated with that CDR’s register set. For example, if the cross point was configured to do point to point switching from the inputs of channel 0 to the output of channel 1 and the inputs of channel 1 to the outputs of channel 0, the EQ physically located at the pins for inputs of channel 0 would be accessible through the register set of channel 1.

A simplified diagram of the cross point switch is shown in Figure 3.

In a typical point-to-point switching application users must configure the following for each channel:

1. Control bus mux setting (ch reg 0x9B)
2. Data path mux setting (ch reg 0x96)
3. Enabling/Disabling the local or multi-drive buffers for each channel (ch reg 0x96)
4. Cross point enable bit (ch reg 0x96)
5. Perform a CDR reset and reset release (ch reg 0x0A)

Note, when using the cross point switch the local and multi-drive buffer should both be enabled regardless of the desired configuration.

The cross point switch can also be used to replicate data or perform a broadcast function. The options for this type of configuration include:

• 1:2 – any channel input to any 2 channels output
• 1:3 – any channel input to any 3 channels output
• 1:4 – any channel input to all 4 channels output

When the cross point switch is configured to replicate/broadcast data a master must be assigned during the cross point configuration. The master channel will have control over the CTLE adaption. All of the slave channels will be able to adapt their own DFE, but will not have control to adapt the CTLE. In this type of configuration there must be 1 channel assigned as a master. All other channels in the broadcast network must be assigned as slaves. There cannot be more than one master channel in a broadcast network. In a broadcast configuration, the straight through path connecting the broadcasting input to its own output needs to be enabled and set to have master control.

In a typical data replication/broadcast application users must configure the following for each channel:

1. Control bus mux setting (ch reg 0x9B)
2. Data path mux setting (ch reg 0x96)
3. Enabling/Disabling the local or multi-drive buffers for each channel (ch reg 0x96)
4. Master/Slave assignment (ch reg 0x96) -- master/slave bit set to master, master function assigned by mux setting
5. Cross point enable bit (ch reg 0x96)
6. Perform a CDR reset and reset release (ch reg 0x0A)

7.3.5 DFE with VGA

A 5-tap DFE with a VGA can be enabled within the data path of each channel to assist with reducing the effects of cross talk, reflections, or post cursor inter-symbol interference (ISI). The DFE must be manually enabled, regardless of the selected adapt mode. Once the DFE has been enabled it can be configured to adapt only during lock acquisition or to adapt continuously. The DFE can also be manually configured to specified tap polarities and tap weights. However, when the DFE is configured manually the DFE auto-adaption should be disabled.

The DFE taps are all feedback taps with 1UI spacing. Each tap has a specified boost weight range and polarity bit.

The VGA is located within the DFE block. The VGA has 2-bit control and allows for 3 levels of boost. The VGA can be used to assist in the recovery of extremely small signals. Note that the default VGA should be used for most applications.

7.3.6 Clock and Data Recovery

The CDR block consists of a Phase Locked Loop (PLL), reference clock based PPM counter, Input and Output Data Multiplexers (mux) and circuits to monitor single bit transitions and detect false locking. The CDR sampling position is fixed at the 0.5UI location for each bit.

By default, the equalized data is fed into the CDR for clock and data recovery. The recovered data is then output to the FIR filter and differential driver. Users can configure the CDR data to route the recovered clock and data to the PRBS checker. Users also have the option of configuring the output of the CDR to send raw non-retimed data, or data from the pattern generator.

The CDR requires the following in order to be properly configured:

• Input reference clock with proper reference clock divider setting to run the PPM counter.
• Expected data rates must be programmed into the CDR either through the rate/sub-rate Table 18 or entered manually with the corrected divider settings.

7.3.7 Reference Clock

The reference clock is not part of the CDR’s PLL. The reference clock is connected only to the PPM counter for each CDR. The PPM counter constrains the allowable lock ranges of the CDR according to the programmed values in the rate/sub-rate Table 18 or the manually entered data rates.

The reference clock can be set to any of the 3 allowable frequencies independent of the data rate of the high speed channel. The input reference clock can be single-ended or differential for the 25 MHz or 125 MHz settings. If the 312.5 MHz setting is used, the input signaling type should be differential. The reference clock can be output through the CLK_MON pins for observation or daisy chaining the reference clock to the next device. If the CLK_MON port is used for daisy chaining then the output frequency should be set to 25 MHz.

If the reference clock port is configured to operate in single-ended mode, the 2.5V LVCMOS clock signal should be applied to the REF_CLK_P pin. In this configuration the REF_CLK_N pin should be floated (N/C). In this case the LVCMOS clock signal should be DC coupled into the REF_CLK_P pin. If the reference clock port is configured for differential mode, it is recommended to AC couple the clock signal into the DS125DF1610 device.

Configuring the reference clock frequency is done in share register 0x02[6:5]. Configuring the reference clock input port for single-ended or differential mode operation is done in share register 0x0B[4]. Enabling or disabling the CLK_MON port is done in share reg 0x0A[0]. Selecting the CLK_MON outputs to transmit the divided (25 MHz) or undivided (input frequency) clock frequency is done in share register 0x04[7].

7.3.8 Differential Driver with FIR Filter

The DS125DF1610 uses a 3-tap FIR filter to assist with transmit equalization. The FIR filter consists of a pre cursor tap, a main cursor tap and a post cursor tap. Each tap has a polarity bit and 64 available levels. By default, the main cursor tap is set to a positive polarity, while the pre cursor and post cursor taps are set to a negative polarity. Users can invert the polarity of all 3 FIR taps to invert the polarity of the output data.

The DS125DF1610 output driver can be manually powered off through SMBus register control.

7.3.9 Setting the Output V_OD

The output differential voltage (V_OD) of the driver is controlled by manipulating the drv_sel_vod bits, DEM bits, and FIR main cursor tap. The Table 6 below shows various settings for V_OD settings ranging from 150mV_PP to 1200 mV_PP. Using the FIR, DEM and drv_sel_vod bits is the recommended method for configuring the output V_OD for the best signal integrity.

7.3.10 Output Driver Polarity Inversion

In some applications it may be necessary to invert the polarity of the data transmitted from the retimer. To invert the polarity of the data read back the FIR polarity settings for the pre, main and post cursor taps and then invert these bits.

7.3.11 Driver Output Rise/Fall Time

In some applications, a longer rise/fall time for the output signal is desired. This can reduce electromagnetic interference (EMI) generated by fast switching waveforms. This is necessary in some applications for regulatory compliance. In others, it can reduce the crosstalk in the system.

The DS125DF1610 can be configured to operate with a nominal rise/fall time corresponding to the maximum slew rate of the output drivers into the load capacitance. Alternatively, the DS125DF1610 can be configured to operate with a slightly greater rise/fall time if desired. By default the DS125DF1610 is configured to use the fastest edge rate.

7.3.12 Debug Features

7.3.13 Interrupt Signals

The DS125DF1610 can be configured to report different events as interrupt signals. These interrupt signals do not impact the operation of the device, but merely report that the selected event has occurred. The interrupt bits in the register sets are all sticky bits. This means that when an event triggers an interrupt the status bit for that interrupt is set to logic HIGH. This interrupt status bit will remain at logic HIGH until the bit has been read. Once the bit has been read it will be automatically cleared, which allows for new interrupts to be detected. The DS125DF1610 will report the occurrence of an interrupt through the INTERR_IO pin. The INTERR_IO pin is an open drain output that will pull the line low when an interrupt signal is triggered.

Note that all available interrupts are disabled by default. Users must activate the various interrupts before they can be used.

The interrupts available in the DS125DF1610 are:

• CDR loss of lock
• CDR locked
• Signal detect loss
• Signal detected
• PRBS pattern checker bit error detected
• HEO/VEO threshold violation

When an interrupt occurs, share register 0x08 and 0x09 report which channel generated the interrupt request. Users can then select the channel(s) that generated the interrupt request and service the interrupt by reading the appropriate interrupt status bits in the corresponding channel registers.

7.3.14 Other Features

7.4.1 SMBus Master Mode

SMBus master mode allows the DS125DF1610 to program itself by reading directly from an external EEPROM. When using the SMBus master mode, the DS125DF1610 will read directly from specific location in the external EEPROM. When designing a system for using the external EEPROM, the user needs to follow these specific guidelines:

• Maximum EEPROM size is 2048 Bytes
• Minimum EEPROM size for a single DS125DF1610 with individual channel configuration is 1417 Bytes (3 base header bytes + 3 address map bytes + 16 x 88 channel register bytes + 3 share register bytes; bytes are defined to be 8-bits)
• Set ENSMB = VDD through 1kΩ resistor, enable SMBus master mode
• The external EEPROM device address byte must be 0xA0
• The external EEPROM device must support 400kHz operation at 2.5V supply
• Set the SMBus address of the DS125DF1610 by configuring the ADDR0 and ADDR1 terminals.

When loading multiple DS125DF1610 devices from the same EEPROM, use these guidelines to configure the devices:

• Configure the SMBus addresses for each DS125DF1610 to be sequential. The first device in the sequence must have an address of 0x30.
• Daisy chain READEN and ALL_DONE from one device to the next device in the sequence so that they do not compete for the EEPROM at the same time.
• All DS125DF1610 devices sharing the same EEPROM must be configured with the common channel bit set to 1. With common channel configuration enabled, each DS125DF1610 device will configure all 16 channels with the same settings.

When loading a single DS125DF1610 from an EEPROM, use these guidelines to configure the device:

• Set the common channel bit to 0 to allow for individual channel configuration. Or set the common channel bit to 1 to load the same configuration settings to all channels.
• When configuring individual channels, a 2048 Byte EEPROM must be used.
• If there are multiple DS125DF1610 devices on a PCB that require individual channel configuration, then each device must have its own EEPROM.

7.4.2 SMBus Slave Mode

7.4.3 Device Configuration in SMBus Slave Mode

The configurable settings of the DS125DF1610 may be set independently for each channel at any time after power up using the SMBus. A register write is accomplished when the controller sends a START condition on the SMBus followed by the Write address of the DS125DF1610 to be configured. After sending the Write address of the DS125DF1610, the controller sends the register address byte followed by the register data byte. The DS125DF1610 acknowledges each byte written to the controller according to the data link protocol of the SMBus Version 2.0 Specification. See this specification for additional information on the operation of the SMBus.

There are 3 types of device registers in the DS125DF1610. These are the global registers, shared registers and the channel registers. The global registers are programmed to access the various channel registers or the shared registers. The shared registers control or allow observation of settings which affect the operation of all channels of the DS125DF1610 at the greater device level.

The channel registers are used to set all the configuration settings of the DS125DF1610. They provide independent control for each channel of the DS125DF1610 for all the settable device characteristics. Any registers not described in the tables that follow should be treated as reserved. The user should not try to write new values to these registers. The user-accessible registers described in the tables that follow provide a complete capability for customizing the operation of the DS125DF1610 on a channel-by-channel basis.

7.5.1 Bit Fields in the Register Set

Many of the registers in the DS125DF1610 are divided into bit fields. This allows a single register to serve multiple purposes, which may be unrelated. Often configuring the DS125DF1610 requires writing a bit field that makes up only part of a register value while leaving the remainder of the register value unchanged.

The procedure for accomplishing this is to read in the current value of the register to be written, modify only the desired bits in this value, and write the modified value back to the register. Of course, if the entire register is to be changed, rather than just a bit field within the register, it is not necessary to read in the current value of the register first. In all the register configuration procedures described in the following sections, this procedure should be kept in mind. In some cases, the entire register is to be modified. When only a part of the register is to be changed, however, the procedure described above should be used.

Most register bits can be read or written to. However, some register bits are constrained to specific interface instructions. Register bits can have the following interface constraints:

• R - Read only
• RW - Read/Write
• RWSC - Read/Write, self clearing
• W - Write only

7.5.2 Writing to and Reading from the Global/Shared/Channel Registers

Global registers can be accessed from the shared register page and also the channel register pages. There are three global registers in the DS125DF1610:

1. Register 0xFC
2. Register 0xFD
3. Register 0xFF

Registers 0xFC and 0xFD are used to select the channel registers to be written to. To select a channel write a 1 to its corresponding bit in these global registers. Note more than one channel may be written to by setting multiple bits in registers 0xFC and 0xFD. However, when performing an SMBus read transaction only one channel can be selected at a time. If multiple channels are selected when attempting to perform an SMBus read, the device will return 0x00.

Register 0xFF bit 1 can be used to perform broadcast register writes to all channels. A single channel read-modify broadcast write type commands can be accomplished by setting register 0xFF to 0x03 and selecting a single channel in the 0xFC or 0xFD registers. This type of configuration allows for the reading of a single channel's register information and then writing to all channels with the modified value.

Table 12. Shared-Channel Select Global Register

GLOBAL REGISTER	BIT	DESCRIPTION
0xFF	7:2	These bits are not used and default to 0
	1	1: Broadcast write to all channels, 0xFF[0] must be set to 1. 0: Normal operation, select channel register as defined in 0xFC and 0xFD
	0	1: Select Channel Registers 0: Select Share Registers

Table 13. Shared Registers

Address (Hex)	Bits	Default Value (Hex)	Mode	EEPROM	Field Name	Description
0	7	0	R	N	SMBus_Addr3	SMBus Address Strapped 7-bit addres is 0x18 + SMBus_Addr[3:0]
	6	0	R	N	SMBus_Addr2
	5	0	R	N	SMBus_Addr1
	4	0	R	N	SMBus_Addr0
	3	0	R	Y	RESERVED
	2:0	0	R	N	RESERVED
1	7	0	R	N	Version2	Device version
	6	1	R	N	Version1
	5	1	R	N	Version0
	4	1	R	N	Device_ID4	Device ID code for DS125DF1610
	3	0	R	N	Device_ID3
	2	0	R	N	Device_ID2
	1	0	R	N	Device_ID1
	0	1	R	N	Device_ID0
2	7	0	RW	N	RESERVED
	6	0	RW	Y	REFCLK_SEL1	Sets the REFCLK input frequency 00: 25 MHz 01: 125 MHz 10: 312.5MHz 11: Reserved
	5	0	RW	Y	REFCLK_SEL0
	4:0	0	RW	N	RESERVED
3	7:3	0	R	N	RESERVED
	2	0	R	Y	RESERVED
	1:0	0	R	N	RESERVED
4	7	0	RW	N	SEL_REF_CLK_DIG_OUT_ANA	1: Selects the divided clock 0: Selects the undivided clock
	6	0	RWSC	N	RST_SMB_REGS	1: Resets share registers
	5	0	RWSC	N	RST_SMB_MAS	1: Resets SMBus Master controller
	4	0	RW	N	RESERVED
	3	0	RW	N	MR_DIS_LOCK_SEQR	1: Disables the lock sequencer circuit 0: Normal operation, lock sequencer is enabled
	2	0	RW	N	RESERVED
	1	0	RW	N	RESERVED
	0	1	RW	N	RESERVED
5	7	0	RW	N	RESERVED
	6	0	RW	N	CRC_EN	1: Slave CRC Trigger
	5	0	RW	N	RESERVED
	4	1	R	N	EEPROM_READ_DONE	This bit is set to 1 when read from EEPROM is done
	3	1	RW	N	LIMIT_CONC_LOCKS3	Sets max number of channels that can lock at any given time, defaults to 8 channels.
	2	0	RW	N	LIMIT_CONC_LOCKS2
	1	0	RW	N	LIMIT_CONC_LOCKS1
	0	0	RW	N	LIMIT_CONC_LOCKS0
6	7:0	0	RW	N	RESERVED
7	7:0	0	RW	N	RESERVED
8	7	0	R	N	INT_Q1C3	Interrupt from quad 1, ch 3
	6	0	R	N	INT_Q1C2	Interrupt from quad 1, ch 2
	5	0	R	N	INT_Q1C1	Interrupt from quad 1, ch 1
	4	0	R	N	INT_Q1C0	Interrupt from quad 1, ch 0
	3	0	R	N	INT_Q0C3	Interrupt from quad 0, ch 3
	2	0	R	N	INT_Q0C2	Interrupt from quad 0, ch 2
	1	0	R	N	INT_Q0C1	Interrupt from quad 0, ch 1
	0	0	R	N	INT_Q0C0	Interrupt from quad 0, ch 0
9	7	0	R	N	INT_Q3C3	Interrupt from quad 3, ch 3
	6	0	R	N	INT_Q3C2	Interrupt from quad 3, ch 2
	5	0	R	N	INT_Q3C1	Interrupt from quad 3, ch 1
	4	0	R	N	INT_Q3C0	Interrupt from quad 3, ch 0
	3	0	R	N	INT_Q2C3	Interrupt from quad 2, ch 3
	2	0	R	N	INT_Q2C2	Interrupt from quad 2, ch 2
	1	0	R	N	INT_Q2C1	Interrupt from quad 2, ch 1
	0	0	R	N	INT_Q2C0	Interrupt from quad 2, ch 0
A	7	0	RW	N	SEL_CLK_FROM_DIG	1: selects ref clk from digital to transmit out 0: selects ref clk from analog loop chain to transmit out. All channels’ analog blocks must have ref clk loop through enabled to transmit ref clk out of device
	6	0	RW	N	SEL_REFCLK_TX_VCM1	Sets the output common-mode voltage: 00: 800mV 01: 1000mV 10: 1200mV 11: Tracks VCC, bias at 1.2V
	5	0	RW	N	SEL_REFCLK_TX_VCM0
	4	0	RW	N	SEL_REFCLK_TX_VOD1	Sets the output differential peak-to-peak voltage: 00: 400mV 01: 533mV 10: 667mV 11: 800mV
	3	0	RW	N	SEL_REFCLK_TX_VOD0
	2	0	RW	N	RESERVED
	1	0	RW	N	SEL_REFCLK_TX_SCP	1:disable 0:Ref-clk TX short-circuit protection
	0	1	RW	Y	DIS_REFCLK_OUT	1: Disable REFCLK_OUT (TRI-STATE) 0: Enable REFCLK_OUT
B	7	0	RW	N	RESERVED
	6	0	R	N	REFCLK_DET	This bit is set to 1 when refclk has been detected
	5	0	RW	N	RESERVED
	4	0	RW	N	REFCLK_SINGLE_END	1: Reference clock input port configured as single-ended input 0: Normal operation, reference clock input port configured as differential input
	3:0	0	RW	N	RESERVED
C	7:3	0	RW	N	RESERVED
	2	0	RW	N	SAR_ADC_RST	Resets SAR ADC
	1	0	RW	N	SAR_ADC_EN	Enables SAR ADC
	0	0	RW	N	RESERVED
D	7	0	RW	N	SAR_ADC_OUT7	10-bit SAR ADC Output[7:0]
	6	0	RW	N	SAR_ADC_OUT6
	5	0	RW	N	SAR_ADC_OUT5
	4	0	RW	N	SAR_ADC_OUT4
	3	0	RW	N	SAR_ADC_OUT3
	2	0	RW	N	SAR_ADC_OUT2
	1	0	RW	N	SAR_ADC_OUT1
	0	0	RW	N	SAR_ADC_OUT0
E	7:2	0	RW	N	RESERVED
	1	0	R	N	SAR_ADC_OUT9	10-bit SAR ADC Output[9:8]
	0	0	R	N	SAR_ADC_OUT8
F	7	1	RW	Y	EN_CH_LOCK15	1: Allows channel to lock 0: Channel not allowed to lock
	6	1	RW	Y	EN_CH_LOCK14	1: Allows channel to lock 0: Channel not allowed to lock
	5	1	RW	Y	EN_CH_LOCK13	1: Allows channel to lock 0: Channel not allowed to lock
	4	1	RW	Y	EN_CH_LOCK12	1: Allows channel to lock 0: Channel not allowed to lock
	3	1	RW	Y	EN_CH_LOCK11	1: Allows channel to lock 0: Channel not allowed to lock
	2	1	RW	Y	EN_CH_LOCK10	1: Allows channel to lock 0: Channel not allowed to lock
	1	1	RW	Y	EN_CH_LOCK9	1: Allows channel to lock 0: Channel not allowed to lock
	0	1	RW	Y	EN_CH_LOCK8	1: Allows channel to lock 0: Channel not allowed to lock
10	7	1	RW	Y	EN_CH_LOCK7	1: Allows channel to lock 0: Channel not allowed to lock
	6	1	RW	Y	EN_CH_LOCK6	1: Allows channel to lock 0: Channel not allowed to lock
	5	1	RW	Y	EN_CH_LOCK5	1: Allows channel to lock 0: Channel not allowed to lock
	4	1	RW	Y	EN_CH_LOCK4	1: Allows channel to lock 0: Channel not allowed to lock
	3	1	RW	Y	EN_CH_LOCK3	1: Allows channel to lock 0: Channel not allowed to lock
	2	1	RW	Y	EN_CH_LOCK2	1: Allows channel to lock 0: Channel not allowed to lock
	1	1	RW	Y	EN_CH_LOCK1	1: Allows channel to lock 0: Channel not allowed to lock
	0	1	RW	Y	EN_CH_LOCK0	1: Allows channel to lock 0: Channel not allowed to lock
11	7:6	0	R	N	EEPRM_LOAD_STATUS	11: Not valid 10: EEPROM load completed successfully 01: EEPROM load failed after 64 attempts 00: EEPROM load in progress
	5	0	R	N	EEPRM_ATMPT5	Number of attempts made to load EEPROM image
	4	0	R	N	EEPRM_ATMPT4
	3	0	R	N	EEPRM_ATMPT3
	2	0	R	N	EEPRM_ATMPT2
	1	0	R	N	EEPRM_ATMPT1
	0	0	R	N	EEPRM_ATMPT0
FC	7	0	RW	N	Channel 7– Quad 1 Channel 3	1: Enables SMBus access to channel 7
	6	0	RW	N	Channel 6– Quad 1 Channel 2	1: Enables SMBus access to channel 6
	5	0	RW	N	Channel 5– Quad 1 Channel 1	1: Enables SMBus access to channel 5
	4	0	RW	N	Channel 4– Quad 1 Channel 0	1: Enables SMBus access to channel 4
	3	0	RW	N	Channel 3– Quad 0 Channel 3	1: Enables SMBus access to channel 3
	2	0	RW	N	Channel 2– Quad 0 Channel 2	1: Enables SMBus access to channel 2
	1	0	RW	N	Channel 1– Quad 0 Channel 1	1: Enables SMBus access to channel 1
	0	0	RW	N	Channel 0– Quad 0 Channel 0	1: Enables SMBus access to channel 0
FD	7	0	RW	N	Channel 15– Quad 3 Channel 3	1: Enables SMBus access to channel 15
	6	0	RW	N	Channel 14– Quad 3 Channel 2	1: Enables SMBus access to channel 14
	5	0	RW	N	Channel 13– Quad 3 Channel 1	1: Enables SMBus access to channel 13
	4	0	RW	N	Channel 12– Quad 3 Channel 0	1: Enables SMBus access to channel 12
	3	0	RW	N	Channel 11– Quad 2 Channel 3	1: Enables SMBus access to channel 11
	2	0	RW	N	Channel 10– Quad 2 Channel 2	1: Enables SMBus access to channel 10
	1	0	RW	N	Channel 9– Quad 2 Channel 1	1: Enables SMBus access to channel 9
	0	0	RW	N	Channel 8– Quad 2 Channel 0	1: Enables SMBus access to channel 8
FE	7	0	R	N	VENDOR_ID7
	6	0	R	N	VENDOR_ID6
	5	0	R	N	VENDOR_ID5
	4	0	R	N	VENDOR_ID4
	3	0	R	N	VENDOR_ID3
	2	0	R	N	VENDOR_ID2
	1	1	R	N	VENDOR_ID1
	0	1	R	N	VENDOR_ID0
FF	7:2	0	RW	N	RESERVED
	1	0	RW	N	WRITE_ALL_CH	1: Write to all channels as if they are the same, but only allows to read back from a single channel specified in 0xFC and 0xFD. Note: EN_CH_SMB must be set to 1, or else this function is invalid.
	0	0	RW	N	EN_CH_SMB	1: Enables SMBus access to the channels specified in 0xFC and 0xFD. 0: Enables SMBus access to the shared registers

Table 14. Channel Registers, 0 to 1F

Address (Hex)	Bits	Default Value (Hex)	Mode	EEPROM	Field Name	Description
0	7	0	RW	N	CLK_CORE_DIS	1: Disables the primary digital clock, resets all state machines 0: Normal operation
	6:4	0	RW	N	RESERVED
	3	0	RW	N	RST_CORE	1: Reset core state machine 0: Normal Operation
	2	0	RW	N	RST_REGS	1: Resets channel registers, restores default values 0: Normal Operation
	1	0	RW	N	RST_VCO	1: Resets PPM counter, EOM counter, FLD counter, SBT counter 0: Normal Operation
	0	0	RW	N	RST_REFCLK	1: Reset PPM counter 0: Normal Operation
1	7	0	R	N	SIG_DET	1: Signal is present on high speed inputs 0: No signal is detected on high speed inputs
	6	0	R	N	POL_INV_DET	1: PRBS checker detected polarity inversion 0: No pattern inversion detected
	5	0	R	N	CDR_LOCK_LOSS_INT	1: indicates loss of CDR lock after having acquired it. Bit clears on read.
	4	0	R	N	PRBS_SEQ_DET3	1: Indicates if the PRBS-31 sequence is locked
	3	0	R	N	PRBS_SEQ_DET2	1: Indicates if the PRBS-15 sequence is locked
	2	0	R	N	PRBS_SEQ_DET1	1: Indicates if the PRBS-9 sequence is locked
	1	0	R	N	PRBS_SEQ_DET0	1: Indicates if the PRBS-7 sequence is locked
	0	0	R	N	SIG_DET_LOSS_INT	Loss of signal indicator. Bit is set once signal is acquired and then lost.
2	7:0	0	R	N	MULTI_PURP_STATUS	Register configured by setting channel register 0x0C[7:4]
3	7	0	RW	Y	EQ_BST0[1]	This register can be used to force an EQ boost setting if used in conjuntion with channel register 0x2D[3]
	6	0	RW	Y	EQ_BST0[0]
	5	0	RW	Y	EQ_BST1[1]
	4	0	RW	Y	EQ_BST1[0]
	3	0	RW	Y	EQ_BST2[1]
	2	0	RW	Y	EQ_BST2[0]
	1	0	RW	Y	EQ_BST3[1]
	0	0	RW	Y	EQ_BST3[0]
4	7:4	0	RW	N	RESERVED
	3	0	RW	Y	RESERVED
	2:0	0x01	RW	N	RESERVED
5	7:0	0x01	RW	N	RESERVED
6	7:0	0x01	RW	N	RESERVED
7	7:0	0x01	RW	N	RESERVED
8	7	0	RW	Y	RESERVED
	6	1	RW	Y	RESERVED
	5	1	RW	Y	RESERVED
	4	0	RW	Y	RESERVED
	3	0	RW	Y	RESERVED
	2	0	RW	Y	RESERVED
	1	0	RW	Y	RESERVED
	0	0	RW	Y	RESERVED
9	7	0	RW	Y	DIVSEL_VCO_CAP_OV	Enable bit to override cap_cnt with value in register 0x0B[4:0]
	6	0	RW	Y	SET_CP_LVL_LPF_OV	Enable bit to override lpf_dac_val with value in register 0x1F[4:0]
	5	0	RW	Y	BYPASS_PFD_OV	Enable bit to override sel_retimed_loopthru and sel_raw_loopthru with values in reg 0x1E[7:5]
	4	0	RW	Y	EN_FD_PD_VCO_PDIQ_OV	Enable bit to override en_fd, pd_pd, pd_vco, pd_pdiq with reg 0x1E[0], reg 0x1E[2], reg 0x1C[0], reg 0x1C[1]
	3	0	RW	Y	EN_PD_CP_OV	Enable bit to override pd_fd_cp and pd_pd_cp with value in reg 0x1B[1:0]
	2	0	RW	Y	DIVSEL_OV	Enable bit to override divsel with value in reg 0x18[6:4] 1: Override enable 0: Normal operation
	1	0	RW	Y	EN_FLD_OV	Enable to override pd_fld with value in reg 0x1E[1]
	0	0	RW	Y	PFD_LOCK_ MODE_SM	Enable FD in lock state
A	7	0	RW	Y	SBT_EN	Enable bit to override sbt_en with value in reg 0x1D[7]
	6	1	RW	Y	EN_IDAC_PD_CP_OV EN_IDAC_FD_CP_OV	Enable bit to overridephase detector charge pump settings with reg 0x1C[7:5] Enable bit to override frequency detector charge pump settings with reg 0x1C[4:2]
	5	0	RW	Y	DAC_LPF_HIGH_ PHASE_OV DAC_LPF_LOW_ PHASE_OV	Enable bit to override loop filter comparator trip voltage with reg 0x16[7:0]
	4	1	RW	Y	EN150_LPF_OV	Enable bit to override en150_lpf with value in reg 0x1F[6]
	3	0	RW	N	CDR_RESET_OV	Enable bit to override CDR reset with reg 0x0A[2]
	2	0	RW	N	CDR_RESET_SM	1: CDR is put into reset 0: normal CDR operation
	1	0	RW	N	CDR_LOCK_OV	Enable CDR lock signal override with reg 0x0A[0]
	0	0	RW	N	CDR_LOCK	CDR lock signal override bit
B	7	0	RW	Y	RESERVED
	6	1	RW	Y	RESERVED
	5	1	RW	Y	RESERVED
	4	0	RW	Y	RESERVED
	3	1	RW	Y	RESERVED
	2	1	RW	Y	RESERVED
	1	1	RW	Y	RESERVED
	0	1	RW	Y	RESERVED
C	7:4	0	RW	N	STATUS_CONTROL	These bits repurpose channel register 0x02 to report different status signals
	3	1	RW	Y	SINGLE_BIT_LIMIT_CHECK_ON	1: Normal operation, device checks for single bit transitions as a gate to achieving CDR lock
	2	0	RW	N	RESERVED
	1	0	RW	Y	EN_IDAC_FD_CP3	Frequency detector charge pump setting bit 3 (MSB) LSB located in channel register 0x1C
	0	0	RW	Y	EN_IDAC_PD_CP3	Phase detector charge pump setting bit 3 (MSB) LSB located in channel register 0x1C
D	7	1	RW	N	DES_PD	1: Deserializer is powered down 0: Deserializer is enabled
	6	0	RW	N	RESERVED
	5	1	RW	Y	DRV_SEL_VOD4	Used in conjunction with 0x2D[2:0] to control the VOD levels of the high speed drivers
	4	1	RW	Y	DRV_SEL_VOD3
	3	0	RW	Y	FIR_RLOAD_MAX
	2	1	RW	Y	FIR_SEL_NEG_GM
	1:0	0	RW	N	RESERVED
E	7:0	0x93	RW	N	RESERVED
F	7:0	0x69	RW	N	RESERVED
10	7:0	0x3A	RW	Y	RESERVED
11	7	0	RW	Y	EOM_SEL_VRANGE1	Manually set the EOM vertical range, used with channel register 0x2C[6] 00: ±100 mV 01: ±200 mV 10: ±300 mV 11: ±400 mV
	6	0	RW	Y	EOM_SEL_VRANGE1
	5	1	RW	Y	EOM_PD	1: Normal operation
	4	0	RW	N	RESERVED
	3	0	RW	Y	DFE_TAP2_POL	Bit forces DFE tap 2 polarity 1: Negative, boosts by the specified tap weight 0: Positive, attenuates by the specified tap weight
	2	0	RW	Y	DFE_TAP3_POL	Bit forces DFE tap 3 polarity 1: Negative, boosts by the specified tap weight 0: Positive, attenuates by the specified tap weight
	1	0	RW	Y	DFE_TAP4_POL	Bit forces DFE tap 4 polarity 1: Negative, boosts by the specified tap weight 0: Positive, attenuates by the specified tap weight
	0	0	RW	Y	DFE_TAP5_POL	Bit forces DFE tap 5 polarity 1: Negative, boosts by the specified tap weight 0: Positive, attenuates by the specified tap weight
12	7	1	RW	Y	DFE_TAP1_POL	Bit forces DFE tap 1 polarity 1: Negative, boosts by the specified tap weight 0: Positive, attenuates by the specified tap weight
	6	1	RW	N	SD_SEL_MUTEZ
	5	1	RW	Y	DFE_SEL_NEG_GM
	4	0	RW	Y	DFE_WT1[4]	Bits force DFE tap 1 weight, manual DFE operation required to take effect
	3	0	RW	Y	DFE_WT1[3]
	2	0	RW	Y	DFE_WT1[2]
	1	0	RW	Y	DFE_WT1[1]
	0	0	RW	Y	DFE_WT1[0]
13	7	1	RW	N	RESERVED
	6	0	RW	N	RESERVED
	5	0	RW	N	RESERVED
	4	1	RW	Y	EQ_EN_DC_OFF	1: Normal operation
	3	0	RW	Y	RESERVED
	2	0	RW	Y	EQ_LIMIT_EN	1: Configures the final stage of the equalizer to be a limiting stage. 0: Normal operation, final stage of the equalizer is configured to be a linear stage.
	1	0	RW	N	RESERVED
	0	0	RW	N	RESERVED
14	7	0	RW	Y	EQ_SD_PRESET	1: Forces signal detect HIGH, and force enables the channel. Should not be set if bit 6 is set. 0: Normal Operation.
	6	0	RW	Y	EQ_SD_RESET	1: Forces signal detect LOW and force disables the channel. Should not be set if bit 7 is set. 0: Normal Operation.
	5	0	RW	Y	EQ_REFA_SEL1	Controls the signal detect assert levels.
	4	0	RW	Y	EQ_REFA_SEL0
	3	0	RW	Y	EQ_REFD_SEL1	Controls the signal detect de-assert levels.
	2	0	RW	Y	EQ_REFD_SEL0
	1:0	0	RW	N	RESERVED
15	7	0	RW	Y	RESERVED
	6	0	RW	N	RESERVED
	5	0	RW	Y	RESERVED
	4	1	RW	Y	RESERVED
	3	0	RW	N	DRV_PD	1: Powers down the high speed driver 0: Normal operation
	2	0	RW	Y	RESERVED
	1	1	RW	Y	DRV_DEM1	Degenerates the pre-driver degeneration 00: 0 dB 01: 1 dB 10: 2 dB 11: 3 dB
	0	0	RW	Y	DRV_DEM0
16	7:0	0x7A	RW	Y	RESERVED
17	7:0	0x25	RW	Y	RESERVED
18	7	0	RW	N	RESERVED
	6	1	RW	Y	PDIQ_SEL_DIV2	These bits will force the divider setting if 0x09[2] is set. 000: Divide by 1 001: Divide by 2 010: Divide by 4 011: Divide by 8 All other values are reserved.
	5	0	RW	Y	PDIQ_SEL_DIV1
	4	0	RW	Y	PDIQ_SEL_DIV0
	3	0	RW	N	RESERVED
	2	0	RW	N	DRV_PD_R_EN	1: Enables the shut down termination resistor to be present when the driver is powered down with channel register 0x15[3] 0: Normal operation, resistor is disconnected from output for propper driver operation
	1:0	0	RW	N	RESERVED
19	7:6	0x20	RW	N	RESERVED
	5:0		RW	Y	RESERVED
1A	7:4	0xA	RW	Y	RESERVED
	3	0	RW	Y	DRV_SEL_VCM1	This feature is reserved for future use.
	2	0	RW	Y	DRV_SEL_VCM0
	1:0	0	RW	N	RESERVED
1B	7:2	0	RW	N	RESERVED
	1	1	RW	Y	CP_EN_CP_PD	1: Normal operation
	0	1	RW	Y	CP_EN_CP_FD	1: Normal operation
1C	7	1	RW	Y	EN_IDAC_PD_CP2	Phase detector charge pump setting MSB located in channel register 0x0C[0] Override bit required for these bits to take effect
	6	0	RW	Y	EN_IDAC_PD_CP1
	5	0	RW	Y	EN_IDAC_PD_CP0
	4	1	RW	Y	EN_IDAC_FD_CP2	Frequency detector charge pump setting MSB located in channel register 0x0C[1] Override bit required for these bits to take effect
	3	0	RW	Y	EN_IDAC_FD_CP1
	2	0	RW	Y	EN_IDAC_FD_CP0
	1:0	0	RW	N	RESERVED
1D	7	0	RW	Y	SBT_EN	SBT enable override 0: Normal operation
	6:0	0	RW	N	RESERVED
1E	7	1	RW	Y	PFD_SEL_DATA_MUX2	For these values to take effect, register 0x09[5] must be set to 1. 000: Raw Data* 001: Retimed Data 100: Pattern Generator 111: Mute All other values are reserved. *Note in this mode the FIR filter will not function. Data is routed only through the pre cursor tap. See Functional Description section for more information.
	6	1	RW	Y	PFD_SEL_DATA_MUX1
	5	1	RW	Y	PFD_SEL_DATA_MUX0
	4	0	RW	N	SER_EN	1: Enables the serializer for pattern generation 0: Disables the serializer
	3	1	RW	Y	DFE_PD	This bit must be cleared for the DFE to be functional in any adapt mode. 0: DFE enabled 1: DFE disabled
	2	0	RW	Y	PFD_PD_PD	PFD phasee detector power down override
	1	0	RW	Y	PFD_EN_FLD	PFD enable FLD override
	0	1	RW	Y	PFD_EN_FD	PFD enable frequency detector override
1F	7:6	0x55	RW	Y	RESERVED
	5:0		RW	Y	RESERVED

Table 15. Channel Registers, 20 to 39

Address (Hex)	Bits	Default Value (Hex)	Mode	EEPROM	Field Name	Description
20	7	0	RW	Y	DFE_WT5[3]	Bits force DFE tap 5 weight, manual DFE operation required to take effect
	6	0	RW	Y	DFE_WT5[2]
	5	0	RW	Y	DFE_WT5[1]
	4	0	RW	Y	DFE_WT5[0]
	3	0	RW	Y	DFE_WT4[3]	Bits force DFE tap 4 weight, manual DFE operation required to take effect
	2	0	RW	Y	DFE_WT4[2]
	1	0	RW	Y	DFE_WT4[1]
	0	0	RW	Y	DFE_WT4[0]
21	7	0	RW	Y	DFE_WT3[3]	Bits force DFE tap 3 weight, manual DFE operation required to take effect
	6	0	RW	Y	DFE_WT3[2]
	5	0	RW	Y	DFE_WT3[1]
	4	0	RW	Y	DFE_WT3[0]
	3	0	RW	Y	DFE_WT2[3]	Bits force DFE tap 2 weight, manual DFE operation required to take effect
	2	0	RW	Y	DFE_WT2[2]
	1	0	RW	Y	DFE_WT2[1]
	0	0	RW	Y	DFE_WT2[0]
22	7	0	RW	N	EOM_OV	1: Override enable for EOM manual control 0: Normal operation
	6	0	RW	N	EOM_SEL_RATE_OV	1: Override enable for EOM rate selection 0: Normal operation
	5:0	0	RW	N	RESERVED
23	7	0	RW	N	EOM_GET_HEO_VEO_OV	1: Override enable for manual control of the HEO/VEO trigger 0: Normal operation
	6	1	RW	Y	DFE_OV	1: Normal operation, DFE must be enabled in channel register 0x1E[3]
	5:0	0	RW	N	RESERVED
24	7	0	RW	N	FAST_EOM	1: Enables fast EOM mode for fully eye capture. In this mode the phase DAC and voltage DAC of the EOM are automatically incremented through a 64 x 64 matrix. Values for each point are stored in channel registers 25 and 26.
	6	0	R	N	DFE_EQ_ERROR_NO_LOCK	DFE/CTLE SM quit due to loss of lock
	5	0	R	N	GET_HEO_VEO_ERROR_ NO_HITS	GET_HEO_VEO sees no hits at zero crossing
	4	0	R	N	GET_HEO_VEO_ERROR_ NO_OPENING	GET_HEO_VEO cannot see a vertical eye opening
	3	0	RW	N	RESERVED
	2	0	RWSC	N	DFE_ADAPT	1: Manually start DFE adaption, self clearing. 0: Normal operation
	1	0	RWSC	N	EOM_GET_HEO_VEO	1: Manually triggers a HEO/VEO measurement. Must be enabled with channel register 0x23[7].
	0	0	RWSC	N	EOM_START	1: Starts EOM counter, self clearing
25	7	0	R	N	EOM_COUNT15	MSBs of EOM counter
	6	0	R	N	EOM_COUNT14
	5	0	R	N	EOM_COUNT13
	4	0	R	N	EOM_COUNT12
	3	0	R	N	EOM_COUNT11
	2	0	R	N	EOM_COUNT10
	1	0	R	N	EOM_COUNT9
	0	0	R	N	EOM_COUNT8
26	7	0	R	N	EOM_COUNT7	LSBs of EOM counter
	6	0	R	N	EOM_COUNT6
	5	0	R	N	EOM_COUNT5
	4	0	R	N	EOM_COUNT4
	3	0	R	N	EOM_COUNT3
	2	0	R	N	EOM_COUNT2
	1	0	R	N	EOM_COUNT1
	0	0	R	N	EOM_COUNT0
27	7	0	R	N	HEO7	HEO value, requires CDR to be locked for valid measurement
	6	0	R	N	HEO6
	5	0	R	N	HEO5
	4	0	R	N	HEO4
	3	0	R	N	HEO3
	2	0	R	N	HEO2
	1	0	R	N	HEO1
	0	0	R	N	HEO0
28	7	0	R	N	VEO7	VEO value, requires CDR to be locked for valid measurement
	6	0	R	N	VEO6
	5	0	R	N	VEO5
	4	0	R	N	VEO4
	3	0	R	N	VEO3
	2	0	R	N	VEO2
	1	0	R	N	VEO1
	0	0	R	N	VEO0
29	7	0	RW	N	RESERVED
	6	0	R	N	EOM_VRANGE_SETTING1	Use these bits to read back the EOM voltage range setting 00: ±100 mV 01: ±200 mV 10: ±300 mV 11: ±400 mV
	5	0	R	N	EOM_VRANGE_SETTING0
	4	0	RW	N	EN_FOM_RESET	1: Enables resetting the FOM before issuing a manual adaption
	3	0	RW	N	VEO_MIN_HITS_1	These bits set the number of hits for a particular phase and voltage location in the EOM before the EOM will indicate a hit has occured. This filtering only affects the VEO measurement. Filter thresholds: 00: 0 hits 01: 15 hits 10, 11: 255 hits
	2	0	RW	N	VEO_MIN_HITS_0
	1:0	0	RW	N	RESERVED
2A	7	0	RW	Y	EOM_TIMER_THR7	Controls the amount of time the EOM samples each point in the eye for. The total counter bit width is 16-bits, this register is the upper 8-bits. The counter counts in 32-bit words, therefore, the total number of bits counted is 32 times this value.
	6	0	RW	Y	EOM_TIMER_THR6
	5	1	RW	Y	EOM_TIMER_THR5
	4	1	RW	Y	EOM_TIMER_THR4
	3	0	RW	Y	EOM_TIMER_THR3
	2	0	RW	Y	EOM_TIMER_THR2
	1	0	RW	Y	EOM_TIMER_THR1
	0	0	RW	Y	EOM_TIMER_THR0
2B	7:6	0	RW	N	RESERVED
	5:4	0	RW	Y	RESERVED
	3	1	RW	Y	EOM_MIN_REQ_HITS3	These bits set the number of hits for a particular phase and voltage location in the EOM before the EOM will indicate a hit has occured. This filtering only affects the HEO measurement. Filter threshold ranges from 0 to 15 hits.
	2	1	RW	Y	EOM_MIN_REQ_HITS2
	1	1	RW	Y	EOM_MIN_REQ_HITS1
	0	1	RW	Y	EOM_MIN_REQ_HITS0
2C	7	1	RW	N	RELOAD_DFE_TAPS	1: Reload DFE taps from last adapted value
	6	1	RW	Y	VEO_SCALE	1: Scale VEO based on EOM vertical range 0: Manual control of vertical range
	5	1	RW	Y	DFE_SM_FOM1	00: not valid 01: SM uses only HEO 10: SM uses only VEO 11: SM uses both HEO and VEO
	4	1	RW	Y	DFE_SM_FOM0
	3	0	RW	Y	DFE_ADAPT_COUNTER3	DFE look-beyond count.
	2	0	RW	Y	DFE_ADAPT_COUNTER2
	1	1	RW	Y	DFE_ADAPT_COUNTER1
	0	0	RW	Y	DFE_ADAPT_COUNTER0
2D	7	0	RW	Y	PD_SCP	1: Power down the short circuit protection for the high speed driver outputs 0: Normal operation, short circuit protection is enabled for the high speed driver outputs
	6	0	RW	Y	SD_EN_FAST_OOB	Feature is reserved for future use.
	5	0	RW	Y	SD_REF_HIGH	Feature is reserved for future use.
	4	0	RW	Y	SD_GAIN	Feature is reserved for future use.
	3	0	RW	Y	EQ_BST_OV	Allow override control of the EQ setting by writing to channel register 0x03. Not recommended for normal operation.
	2	1	RW	Y	DRV_SEL_VOD2	Used in conjunction with 0x0D[5:4] to control the VOD levels of the high speed drivers
	1	1	RW	Y	DRV_SEL_VOD1
	0	1	RW	Y	DRV_SEL_VOD0
2E	7:0	0	RW	N	RESERVED
2F	7	0	RW	Y	RATE1	4 bits determine standard. 0x6: 11.5 Gbps 0x7: 12.5, 6.5, 3.125 Gbps 0x8: 9.8304, 4.9152, 2.4576 Gbps 0x9: 6.144, 3.072 Gbps 0xA: 10, 5, 2.5 Gbps 0xB: 10.3125, 1.25
	6	0	RW	Y	RATE0
	5	1	RW	Y	SUBRATE1
	4	1	RW	Y	SUBRATE0
	3	0	RW	Y	INDEX_OV	If this bit is set to 1, reg 0x13 is to be used as a 5 bit index to the [31:0] array of EQ settings.
	2	1	RW	Y	EN_PPM_CHECK	1: PPM check to be used as a qualifier when performing lock detect
	1	1	RW	Y	EN_FLD_CHECK	1: False lock detector is used as a qualifier when performing lock detect
	0	0	RWSC	N	CTLE_ADAPT	Starts CTLE adaption, self clearing
30	7	0	RW	N	FREEZE_PPM_CNT	1: Freeze PPM counter to allow safe read asynchronously
	6	0	RW	Y	EQ_SEARCH_OV_EN	Enables the EQ search bit to be force by channel register 0x13[2]
	5	0	RW	N	EN_PATT_INV	1: Enables automatic pattern inversion of successive 16-bit words when using the user defined pattern generator option.
	4	0	RW	N	RELOAD_PRBS_CHKR	Feature is reserved for future use.
	3	0	RW	N	PRBS_EN_DIG_CLK	This bit enables the clock to operate the PRBS generator and/or the PRBS checker. Toggling this bit is the primary method to reset the PRBS pattern generator and PRBS checker.
	2	0	RW	N	PRBS_PROGPATT_EN	1: Enable a fixed user defined pattern. Requires that the pattern generator be configured properly to be enabled
	1	0	RW	N	PRBS_PATTERN_SEL1	Selects the PRBS generator pattern to output. Requires that the pattern generator be configured properly. 00: PRBS-7 01: PRBS-9 10: PRBS-15 11: PRBS-31
	0	0	RW	N	PRBS_PATTERN_SEL0
31	7	0	RW	N	PRBS_INT_EN	1: Enables interrupt for detection of PRBS errors. The PRBS checker must be properly configured for this feature to work
	6	0	RW	Y	ADAPT_MODE1	00: no adaption 01: adapt CTLE only 10: adapt CTLE until optimal, then DFE, then CTLE again 11: adapt CTLE until HEO/VEO threshold in reg 0x33 are met, then DFE, then EQ until optimal
	5	0	RW	Y	ADAPT_MODE0
	4	0	RW	Y	EQ_SM_FOM1	Sets the desired FoM for EQ adaption 00: not valid 01: SM uses HEO only 10: SM uses VEO only 11: SM uses both HEO and VEO
	3	0	RW	Y	EQ_SM_FOM0
	2	0	RW	N	RESERVED
	1	0	RW	N	CDR_LOCK_LOSS_INT_EN	1: enables loss of CDR lock interrupt
	0	0	RW	N	SIG_DET_LOSS_INT_EN	1: enable loss of signal detect interrupt
32	7	0	RW	Y	HEO_INT_THRESH3	These bits set the threshold for the HEO and VEO interrupt. Each threshold bit represents 8 counts of HEO or VEO.
	6	0	RW	Y	HEO_INT_THRESH2
	5	0	RW	Y	HEO_INT_THRESH1
	4	1	RW	Y	HEO_INT_THRESH0
	3	0	RW	Y	VEO_INT_THRESH3
	2	0	RW	Y	VEO_INT_THRESH2
	1	0	RW	Y	VEO_INT_THRESH1
	0	1	RW	Y	VEO_INT_THRESH0
33	7	1	RW	Y	HEO_THRESH3	In adapt mode 3, this register sets the minimum HEO and VEO required for CTLE adaption, before starting DFE adaption. This can be a max of 15
	6	0	RW	Y	HEO_THRESH2
	5	0	RW	Y	HEO_THRESH1
	4	0	RW	Y	HEO_THRESH0
	3	1	RW	Y	VEO_THRESH3
	2	0	RW	Y	VEO_THRESH2
	1	0	RW	Y	VEO_THRESH1
	0	0	RW	Y	VEO_THRESH0
34	7	0	RW	N	PPM_ERR_RDY	1: Indicates that a PPM error count is read to be read from channel register 0x3B and 0x3C
	6	0	RW	Y	LOW_POWER_MODE_DISABLE	By default, all blocks (except signal detect) power down after 100ms after signal detect goes low.
	5	1	RW	Y	LOCK_COUNTER1	After achieving lock, the CDR continues to monitor the lock criteria.If the lock criteria fail, the lock is checked for a total of N number of times before declaring an out of lock condition, where N is set by this the value in these registers, with a  max value of +3, for a total of 4. If during the N lock checks, lock is regained, then the lock condition is left HI, and the counter is reset back to zero.
	4	1	RW	Y	LOCK_COUNTER0
	3	1	RW	Y	DFE_MAX_TAP2_5[3]	These 4 bits are used to set the maximum value by which DFE taps 2-5 are able to adapt with each subsequent adaptation. Same used for both polarities.
	2	1	RW	Y	DFE_MAX_TAP2_5[2]
	1	1	RW	Y	DFE_MAX_TAP2_5[1]
	0	1	RW	Y	DFE_MAX_TAP2_5[0]
35	7	0	RW	Y	DATA_LOCK_PPM1	Modifies the value of the ppm delta tolerance from channel register 0x64 00 - ppm_delta[7:0] =1 x ppm_delta[7:0] 01 - ppm_delta[7:0] =1 x ppm_delta[7:0] + ppm_delta[3:1] 10 - ppm_delta[7:0] =2 x ppm_delta[7:0] 11 - ppm_delta[7:0] =2 x ppm_delta[7:0] + ppm_delta[3:1]
	6	0	RW	Y	DATA_LOCK_PPM0
	5	0	RW	N	GET_PPM_ERROR	Get ppm error from ppm_count - clears when done. Normally updates continuously, but can be manually triggered with read value from channel register 0x3B and 0x3C
	4	1	RW	Y	DFE_MAX_TAP1[4]	Determines max tap limit for DFE tap 1
	3	1	RW	Y	DFE_MAX_TAP1[3]
	2	1	RW	Y	DFE_MAX_TAP1[2]
	1	1	RW	Y	DFE_MAX_TAP1[1]
	0	1	RW	Y	DFE_MAX_TAP1[0]
36	7	0	RW	N	UNCORR_ERR_INT_EN	Feature is reserved for future use.
	6	0	RW	N	HEO_VEO_INT_EN	1: Enable HEO/VEO interrupt capability
	5	1	RW	Y	REF_MODE1	11: Fast_lock all cap dac ref clock enabled (recommended) 10: Reserved 01: Reserved 00: referenceless all cap dac, for debug use only
	4	1	RW	Y	REF_MODE0
	3	0	RW	Y	EN_6466B_LOCK_GATE	Feautre is reserved for future use.
	2	0	RW	Y	CDR_CAP_DAC_RNG_OV	Override enable for cap dac range
	1	0	RW	N	EN_6466B_RESTART	Feature is reserved for future use.
	0	0	RW	N	K28P5_6466_INT_EN	Feature is reserved for future use.
37	7	0	R	N	CTLE_STATUS7	Feature is reserved for future use.
	6	0	R	N	CTLE_STATUS6
	5	0	R	N	CTLE_STATUS5
	4	0	R	N	CTLE_STATUS4
	3	0	R	N	CTLE_STATUS3
	2	0	R	N	CTLE_STATUS2
	1	0	R	N	CTLE_STATUS1
	0	0	R	N	CTLE_STATUS0
38	7	0	R	N	DFE_STATUS7	Feature is reserved for future use.
	6	0	R	N	DFE_STATUS6
	5	0	R	N	DFE_STATUS5
	4	0	R	N	DFE_STATUS4
	3	0	R	N	DFE_STATUS3
	2	0	R	N	DFE_STATUS2
	1	0	R	N	DFE_STATUS1
	0	0	R	N	DFE_STATUS0
39	7	0	RW	N	PRELOCK_COMPARATOR_ ABRT_MODE	Feature is reserved for future use.
	6	0	RW	Y	EOM_RATE1	With eom_ov=1, these bits control the Eye Monitor Rate. 11: Use for Full Rate, Fastest 10 : Use for 1/2 Rate 01: Use for 1/4 Rate 00: Use for 1/8 Rate, Slowest
	5	0	RW	Y	EOM_RATE0
	4	0	RW	Y	START_INDEX4	Start index for EQ adaptation
	3	0	RW	Y	START_INDEX3
	2	0	RW	Y	START_INDEX2
	1	0	RW	Y	START_INDEX1
	0	0	RW	Y	START_INDEX0

Table 16. Channel Registers, 3A to 59

Address (Hex)	Bits	Default Value (Hex)	Mode	EEPROM	Field Name	Description
3A	7	0	RW	Y	FIXED_EQ_BST0[1]	During adaptation, if the divider setting is >2, then a fixed EQ setting from this register will be used. However, if channel register 0x6F[7] is enabled, then an EQ adaptation will be performed instead.
	6	0	RW	Y	FIXED_EQ_BST0[0]
	5	0	RW	Y	FIXED_EQ_BST1[1]
	4	0	RW	Y	FIXED_EQ_BST1[0]
	3	0	RW	Y	FIXED_EQ_BST2[1]
	2	0	RW	Y	FIXED_EQ_BST2[0]
	1	0	RW	Y	FIXED_EQ_BST3[1]
	0	0	RW	Y	FIXED_EQ_BST3[0]
3B	7	0	R	N	PPM_COUNT15	PPM count MSB
	6	0	R	N	PPM_COUNT14
	5	0	R	N	PPM_COUNT13
	4	0	R	N	PPM_COUNT12
	3	0	R	N	PPM_COUNT11
	2	0	R	N	PPM_COUNT10
	1	0	R	N	PPM_COUNT9
	0	0	R	N	PPM_COUNT8
3C	7	0	R	N	PPM_COUNT7	PPM count LSB
	6	0	R	N	PPM_COUNT6
	5	0	R	N	PPM_COUNT5
	4	0	R	N	PPM_COUNT4
	3	0	R	N	PPM_COUNT3
	2	0	R	N	PPM_COUNT2
	1	0	R	N	PPM_COUNT1
	0	0	R	N	PPM_COUNT0
3D	7	0	RW	Y	FIR_PD_pd
	6	0	RW	Y	FIR_C0_SGN	FIR main cursor polarity 1: negative 0: positive
	5	1	RW	Y	FIR_C0[5]	FIR main cursor setting
	4	1	RW	Y	FIR_C0[4]
	3	0	RW	Y	FIR_C0[3]
	2	1	RW	Y	FIR_C0[2]
	1	0	RW	Y	FIR_C0[1]
	0	1	RW	Y	FIR_C0[0]
3E	7	0	RW	Y	FIR_PD_TX
	6	1	RW	Y	FIR_CN1_SGN	FIR pre cursor polarity 1: negative 0: positive
	5	0	RW	Y	FIR_CN1[5]	FIR pre cursor setting
	4	0	RW	Y	FIR_CN1[4]
	3	0	RW	Y	FIR_CN1[3]
	2	0	RW	Y	FIR_CN1[2]
	1	1	RW	Y	FIR_CN1[1]
	0	1	RW	Y	FIR_CN1[0]
3F	7	1	RW	Y	FIR_SEL_I_MAX
	6	1	RW	Y	FIR_CP1_SGN	FIR post cursor polarity 1: negative 0: positive
	5	0	RW	Y	FIR_CP1[5]	FIR post cursor setting
	4	0	RW	Y	FIR_CP1[4]
	3	0	RW	Y	FIR_CP1[3]
	2	1	RW	Y	FIR_CP1[2]
	1	1	RW	Y	FIR_CP1[1]
	0	1	RW	Y	FIR_CP1[0]
40	7	0	RW	Y	EQ_ARRAY_INDEX_0_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_0_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_0_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_0_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_0_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_0_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_0_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_0_BST3[0]
41	7	0	RW	Y	EQ_ARRAY_INDEX_1_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_1_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_1_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_1_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_1_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_1_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_1_BST3[1]
	0	1	RW	Y	EQ_ARRAY_INDEX_1_BST3[0]
42	7	0	RW	Y	EQ_ARRAY_INDEX_2_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_2_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_2_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_2_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_2_BST2[1]
	2	1	RW	Y	EQ_ARRAY_INDEX_2_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_2_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_2_BST3[0]
43	7	0	RW	Y	EQ_ARRAY_INDEX_3_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_3_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_3_BST1[1]
	4	1	RW	Y	EQ_ARRAY_INDEX_3_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_3_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_3_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_3_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_3_BST3[0]
44	7	0	RW	Y	EQ_ARRAY_INDEX_4_BST0[1]
	6	1	RW	Y	EQ_ARRAY_INDEX_4_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_4_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_4_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_4_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_4_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_4_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_4_BST3[0]
45	7	0	RW	Y	EQ_ARRAY_INDEX_5_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_5_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_5_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_5_BST1[0]
	3	1	RW	Y	EQ_ARRAY_INDEX_5_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_5_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_5_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_5_BST3[0]
46	7	0	RW	Y	EQ_ARRAY_INDEX_6_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_6_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_6_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_6_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_6_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_6_BST2[0]
	1	1	RW	Y	EQ_ARRAY_INDEX_6_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_6_BST3[0]
47	7	1	RW	Y	EQ_ARRAY_INDEX_7_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_7_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_7_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_7_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_7_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_7_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_7_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_7_BST3[0]
48	7	0	RW	Y	EQ_ARRAY_INDEX_8_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_8_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_8_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_8_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_8_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_8_BST2[0]
	1	1	RW	Y	EQ_ARRAY_INDEX_8_BST3[1]
	0	1	RW	Y	EQ_ARRAY_INDEX_8_BST3[0]
49	7	0	RW	Y	EQ_ARRAY_INDEX_9_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_9_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_9_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_9_BST1[0]
	3	1	RW	Y	EQ_ARRAY_INDEX_9_BST2[1]
	2	1	RW	Y	EQ_ARRAY_INDEX_9_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_9_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_9_BST3[0]
4A	7	0	RW	Y	EQ_ARRAY_INDEX_10_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_10_BST0[0]
	5	1	RW	Y	EQ_ARRAY_INDEX_10_BST1[1]
	4	1	RW	Y	EQ_ARRAY_INDEX_10_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_10_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_10_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_10_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_10_BST3[0]
4B	7	0	RW	Y	EQ_ARRAY_INDEX_11_BST0[1]
	6	1	RW	Y	EQ_ARRAY_INDEX_11_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_11_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_11_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_11_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_11_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_11_BST3[1]
	0	1	RW	Y	EQ_ARRAY_INDEX_11_BST3[0]
4C	7	0	RW	Y	EQ_ARRAY_INDEX_12_BST0[1]
	6	1	RW	Y	EQ_ARRAY_INDEX_12_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_12_BST1[1]
	4	1	RW	Y	EQ_ARRAY_INDEX_12_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_12_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_12_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_12_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_12_BST3[0]
4D	7	1	RW	Y	EQ_ARRAY_INDEX_13_BST0[1]
	6	1	RW	Y	EQ_ARRAY_INDEX_13_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_13_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_13_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_13_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_13_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_13_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_13_BST3[0]
4E	7	0	RW	Y	EQ_ARRAY_INDEX_14_BST0[1]
	6	1	RW	Y	EQ_ARRAY_INDEX_14_BST0[0]
	5	1	RW	Y	EQ_ARRAY_INDEX_14_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_14_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_14_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_14_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_14_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_14_BST3[0]
4F	7	1	RW	Y	EQ_ARRAY_INDEX_15_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_15_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_15_BST1[1]
	4	1	RW	Y	EQ_ARRAY_INDEX_15_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_15_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_15_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_15_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_15_BST3[0]
50	7	1	RW	Y	EQ_ARRAY_INDEX_16_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_16_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_16_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_16_BST1[0]
	3	1	RW	Y	EQ_ARRAY_INDEX_16_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_16_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_16_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_16_BST3[0]
51	7	1	RW	Y	EQ_ARRAY_INDEX_17_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_17_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_17_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_17_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_17_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_17_BST2[0]
	1	1	RW	Y	EQ_ARRAY_INDEX_17_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_17_BST3[0]
52	7	1	RW	Y	EQ_ARRAY_INDEX_18_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_18_BST0[0]
	5	1	RW	Y	EQ_ARRAY_INDEX_18_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_18_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_18_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_18_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_18_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_18_BST3[0]
53	7	0	RW	Y	EQ_ARRAY_INDEX_19_BST0[1]
	6	1	RW	Y	EQ_ARRAY_INDEX_19_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_19_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_19_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_19_BST2[1]
	2	1	RW	Y	EQ_ARRAY_INDEX_19_BST2[0]
	1	1	RW	Y	EQ_ARRAY_INDEX_19_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_19_BST3[0]
54	7	0	RW	Y	EQ_ARRAY_INDEX_20_BST0[1]
	6	1	RW	Y	EQ_ARRAY_INDEX_20_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_20_BST1[1]
	4	1	RW	Y	EQ_ARRAY_INDEX_20_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_20_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_20_BST2[0]
	1	1	RW	Y	EQ_ARRAY_INDEX_20_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_20_BST3[0]
55	7	1	RW	Y	EQ_ARRAY_INDEX_21_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_21_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_21_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_21_BST1[0]
	3	1	RW	Y	EQ_ARRAY_INDEX_21_BST2[1]
	2	1	RW	Y	EQ_ARRAY_INDEX_21_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_21_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_21_BST3[0]
56	7	1	RW	Y	EQ_ARRAY_INDEX_22_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_22_BST0[0]
	5	1	RW	Y	EQ_ARRAY_INDEX_22_BST1[1]
	4	1	RW	Y	EQ_ARRAY_INDEX_22_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_22_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_22_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_22_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_22_BST3[0]
57	7	1	RW	Y	EQ_ARRAY_INDEX_23_BST0[1]
	6	1	RW	Y	EQ_ARRAY_INDEX_23_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_23_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_23_BST1[0]
	3	1	RW	Y	EQ_ARRAY_INDEX_23_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_23_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_23_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_23_BST3[0]
58	7	0	RW	Y	EQ_ARRAY_INDEX_24_BST0[1]
	6	1	RW	Y	EQ_ARRAY_INDEX_24_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_24_BST1[1]
	4	1	RW	Y	EQ_ARRAY_INDEX_24_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_24_BST2[1]
	2	1	RW	Y	EQ_ARRAY_INDEX_24_BST2[0]
	1	1	RW	Y	EQ_ARRAY_INDEX_24_BST3[1]
	0	1	RW	Y	EQ_ARRAY_INDEX_24_BST3[0]
59	7	0	RW	Y	EQ_ARRAY_INDEX_25_BST0[1]
	6	1	RW	Y	EQ_ARRAY_INDEX_25_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_25_BST1[1]
	4	1	RW	Y	EQ_ARRAY_INDEX_25_BST1[0]
	3	1	RW	Y	EQ_ARRAY_INDEX_25_BST2[1]
	2	1	RW	Y	EQ_ARRAY_INDEX_25_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_25_BST3[1]
	0	1	RW	Y	EQ_ARRAY_INDEX_25_BST3[0]

Table 17. Channel Registers, 5A to 9B

Address (Hex)	Bits	Default Value (Hex)	Mode	EEPROM	Field Name	Description
5A	7	0	RW	Y	EQ_ARRAY_INDEX_26_BST0[1]
	6	1	RW	Y	EQ_ARRAY_INDEX_26_BST0[0]
	5	1	RW	Y	EQ_ARRAY_INDEX_26_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_26_BST1[0]
	3	1	RW	Y	EQ_ARRAY_INDEX_26_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_26_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_26_BST3[1]
	0	1	RW	Y	EQ_ARRAY_INDEX_26_BST3[0]
5B	7	0	RW	Y	EQ_ARRAY_INDEX_27_BST0[1]
	6	1	RW	Y	EQ_ARRAY_INDEX_27_BST0[0]
	5	1	RW	Y	EQ_ARRAY_INDEX_27_BST1[1]
	4	1	RW	Y	EQ_ARRAY_INDEX_27_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_27_BST2[1]
	2	1	RW	Y	EQ_ARRAY_INDEX_27_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_27_BST3[1]
	0	1	RW	Y	EQ_ARRAY_INDEX_27_BST3[0]
5C	7	1	RW	Y	EQ_ARRAY_INDEX_28_BST0[1]
	6	1	RW	Y	EQ_ARRAY_INDEX_28_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_28_BST1[1]
	4	1	RW	Y	EQ_ARRAY_INDEX_28_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_28_BST2[1]
	2	1	RW	Y	EQ_ARRAY_INDEX_28_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_28_BST3[1]
	0	1	RW	Y	EQ_ARRAY_INDEX_28_BST3[0]
5D	7	1	RW	Y	EQ_ARRAY_INDEX_29_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_29_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_29_BST1[1]
	4	1	RW	Y	EQ_ARRAY_INDEX_29_BST1[0]
	3	1	RW	Y	EQ_ARRAY_INDEX_29_BST2[1]
	2	0	RW	Y	EQ_ARRAY_INDEX_29_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_29_BST3[1]
	0	1	RW	Y	EQ_ARRAY_INDEX_29_BST3[0]
5E	7	1	RW	Y	EQ_ARRAY_INDEX_30_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_30_BST0[0]
	5	0	RW	Y	EQ_ARRAY_INDEX_30_BST1[1]
	4	1	RW	Y	EQ_ARRAY_INDEX_30_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_30_BST2[1]
	2	1	RW	Y	EQ_ARRAY_INDEX_30_BST2[0]
	1	1	RW	Y	EQ_ARRAY_INDEX_30_BST3[1]
	0	0	RW	Y	EQ_ARRAY_INDEX_30_BST3[0]
5F	7	1	RW	Y	EQ_ARRAY_INDEX_31_BST0[1]
	6	0	RW	Y	EQ_ARRAY_INDEX_31_BST0[0]
	5	1	RW	Y	EQ_ARRAY_INDEX_31_BST1[1]
	4	0	RW	Y	EQ_ARRAY_INDEX_31_BST1[0]
	3	0	RW	Y	EQ_ARRAY_INDEX_31_BST2[1]
	2	1	RW	Y	EQ_ARRAY_INDEX_31_BST2[0]
	1	0	RW	Y	EQ_ARRAY_INDEX_31_BST3[1]
	0	1	RW	Y	EQ_ARRAY_INDEX_31_BST3[0]
60	7	0	RW	Y	GRP0_OV_CNT7	Group 0 count LSB
	6	0	RW	Y	GRP0_OV_CNT6
	5	0	RW	Y	GRP0_OV_CNT5
	4	0	RW	Y	GRP0_OV_CNT4
	3	0	RW	Y	GRP0_OV_CNT3
	2	0	RW	Y	GRP0_OV_CNT2
	1	0	RW	Y	GRP0_OV_CNT1
	0	0	RW	Y	GRP0_OV_CNT0
61	7	0	RW	Y	CNT_DLTA_OV_0	Override enable for group 0 manual data rate selection
	6	0	RW	Y	GRP0_OV_CNT14	Group 0 count MSB
	5	0	RW	Y	GRP0_OV_CNT13
	4	0	RW	Y	GRP0_OV_CNT12
	3	0	RW	Y	GRP0_OV_CNT11
	2	0	RW	Y	GRP0_OV_CNT10
	1	0	RW	Y	GRP0_OV_CNT9
	0	0	RW	Y	GRP0_OV_CNT8
62	7	0	RW	Y	GRP1_OV_CNT7	Group 1 count LSB
	6	0	RW	Y	GRP1_OV_CNT6
	5	0	RW	Y	GRP1_OV_CNT5
	4	0	RW	Y	GRP1_OV_CNT4
	3	0	RW	Y	GRP1_OV_CNT3
	2	0	RW	Y	GRP1_OV_CNT2
	1	0	RW	Y	GRP1_OV_CNT1
	0	0	RW	Y	GRP1_OV_CNT0
63	7	0	RW	Y	CNT_DLTA_OV_1	Override enable for group 1 manual data rate selection
	6	0	RW	Y	GRP1_OV_CNT14	Group 1 count MSB
	5	0	RW	Y	GRP1_OV_CNT13
	4	0	RW	Y	GRP1_OV_CNT12
	3	0	RW	Y	GRP1_OV_CNT11
	2	0	RW	Y	GRP1_OV_CNT10
	1	0	RW	Y	GRP1_OV_CNT9
	0	0	RW	Y	GRP1_OV_CNT8
64	7	0	RW	Y	GRP0_OV_DLTA3	Sets the PPM delta tolerance for the PPM counter lock check for group 0. Must also program channel register 0x67[7].
	6	0	RW	Y	GRP0_OV_DLTA2
	5	0	RW	Y	GRP0_OV_DLTA1
	4	0	RW	Y	GRP0_OV_DLTA0
	3	0	RW	Y	GRP1_OV_DLTA3	Sets the PPM delta tolerance for the PPM counter lock check for group 1. Must also program channel register 0x67[6].
	2	0	RW	Y	GRP1_OV_DLTA2
	1	0	RW	Y	GRP1_OV_DLTA1
	0	0	RW	Y	GRP1_OV_DLTA0
65	7:0	0	RW	N	RESERVED
66	7:00	0	RW	N	RESERVED
67	7	0	RW	Y	GRP0_OV_DLTA4
	6	0	RW	Y	GRP1_OV_DLTA4
	5	1	RW	Y	HV_LOCKMON_EN	1: Normal operation, HEO/VEO measurements are used for lock monitoring
	4:1	0	RW	N	RESERVED
	0	0	RW	N	LOCKMON_FRC_EN	This feature is reserved for future use.
68	7:5	0	RW	N	RESERVED
	4	0	RW	N	ADPT_FRC_EN	This feature is reserved for future use.
	3	0	RW	N	SCN_OBS_CTRL3	This feature is reserved for future use.
	2	0	RW	N	SCN_OBS_CTRL2
	1	0	RW	N	SCN_OBS_CTRL1
	0	0	RW	N	SCN_OBS_CTRL0
69	7:5	0	RW	N	RESERVED
	4	0	RW	N	CTLE_ADPT_FRC_EN	This feature is reserved for future use.
	3	1	RW	Y	HV_LCKMON_CNT_MS3	This feature is reserved for future use.
	2	0	RW	Y	HV_LCKMON_CNT_MS2
	1	1	RW	Y	HV_LCKMON_CNT_MS1
	0	0	RW	Y	HV_LCKMON_CNT_MS0
6A	7	0	RW	Y	VEO_LCK_THRSH3	VEO threshold to meet before lock is established. The LSB step size is 4 counts of VEO.
	6	0	RW	Y	VEO_LCK_THRSH2
	5	1	RW	Y	VEO_LCK_THRSH1
	4	0	RW	Y	VEO_LCK_THRSH0
	3	0	RW	Y	HEO_LCK_THRSH3	HEO threshold to meet before lock is established. The LSB step size is 4 counts of HEO.
	2	0	RW	Y	HEO_LCK_THRSH2
	1	1	RW	Y	HEO_LCK_THRSH1
	0	0	RW	Y	HEO_LCK_THRSH0
6B	7	0	RW	Y	FOM_A7	Alternate Figure of Merit variable A Max value for this register is 128, do not use the MSB
	6	1	RW	Y	FOM_A6
	5	0	RW	Y	FOM_A5
	4	0	RW	Y	FOM_A4
	3	0	RW	Y	FOM_A3
	2	0	RW	Y	FOM_A2
	1	0	RW	Y	FOM_A1
	0	0	RW	Y	FOM_A0
6C	7	0	RW	Y	FOM_B7	HEO adjustment for Alternate FoM, variable B
	6	1	RW	Y	FOM_B6
	5	0	RW	Y	FOM_B5
	4	0	RW	Y	FOM_B4
	3	0	RW	Y	FOM_B3
	2	0	RW	Y	FOM_B2
	1	0	RW	Y	FOM_B1
	0	0	RW	Y	FOM_B0
6D	7	0	RW	Y	FOM_C7	VEO adjustment for alternate FoM, variable C
	6	1	RW	Y	FOM_C6
	5	0	RW	Y	FOM_C5
	4	0	RW	Y	FOM_C4
	3	0	RW	Y	FOM_C3
	2	0	RW	Y	FOM_C2
	1	0	RW	Y	FOM_C1
	0	0	RW	Y	FOM_C0
6E	7	0	RW	Y	EN_NEW_FOM_CTLE	1: CTLE adaption state machine will use the alternate FoM HEO_ALT = (HEO-B)*A*2 VEO_ALT = (VEO-C)*(1-A)*2 The values of A,B,C are set in channel register 0x6B, 0x6C, and 0x6D. The value of A is equal to the register value divided by 128 The Alternate FoM = (HEO-B)*A*2 + (VEO-C)*(1-A)*2
	6	0	RW	Y	EN_NEW_FOM_DFE	1: DFE adaption state machine will use the alternate FoM HEO_ALT = (HEO-B)*A*2 VEO_ALT = (VEO-C)*(1-A)*2 The values of A,B,C are set in channel register 0x6B, 0x6C, and 0x6D. The value of A is equal to the register value divided by 128 The Alternate FoM = (HEO-B)*A*2 + (VEO-C)*(1-A)*2
	5:1	0	RW	N	RESERVED
	0	0	RW	N	GET_HV_ST_FRC_EN	This feature is reserved for future use.
6F	7	0	RW	Y	EN_LOW_DIVSEL_EQ	1: EQ adaption will be performed for all divider settings 0: EQ adaption will only be performed for dividers of 1 and 2
	6:5	0	RW	Y	RESERVED
	4:0	0	RW	N	RESERVED
70	7:4	0	RW	N	RESERVED
	3	0	RW	Y	RESERVED
	2	0	RW	Y	EQ_LB_CNT2	CTLE look beyond count for adaption.
	1	1	RW	Y	EQ_LB_CNT1
	0	1	RW	Y	EQ_LB_CNT0
71	7	0	R	N	PRBS_INT	1: Indicates that a PRBS error has been detected. Requires the PRBS checker to be properly configured. This bit will stay set until it has been cleared by being read. This bit will clear after reading
	6	0	R	N	K28P5_6466_COND_MET_INT	This feature is reserved for future use.
	5	0	R	N	DFE_POL_1_OBS	Primary observation point for DFE tap 1 polarity
	4	0	R	N	DFE_WT1_OBS4	Primary observation point for DFE tap 1 weight
	3	0	R	N	DFE_WT1_OBS3
	2	0	R	N	DFE_WT1_OBS2
	1	0	R	N	DFE_WT1_OBS1
	0	0	R	N	DFE_WT1_OBS0
72	7:5	0	RW	N	RESERVED
	4	0	R	N	DFE_POL_2_OBS	Primary observation point for DFE tap 2 polarity
	3	0	R	N	DFE_WT2_OBS3	Primary observation point for DFE tap 2 weight
	2	0	R	N	DFE_WT2_OBS2
	1	0	R	N	DFE_WT2_OBS1
	0	0	R	N	DFE_WT2_OBS0
73	7:5	0	RW	N	RESERVED
	4	0	R	N	DFE_POL_3_OBS	Primary observation point for DFE tap 3 polarity
	3	0	R	N	DFE_WT3_OBS3	Primary observation point for DFE tap 3 weight
	2	0	R	N	DFE_WT3_OBS2
	1	0	R	N	DFE_WT3_OBS1
	0	0	R	N	DFE_WT3_OBS0
74	7:5	0	RW	N	RESERVED
	4	0	R	N	DFE_POL_4_OBS	Primary observation point for DFE tap 4 polarity
	3	0	R	N	DFE_WT4_OBS3	Primary observation point for DFE tap 4 weight
	2	0	R	N	DFE_WT4_OBS2
	1	0	R	N	DFE_WT4_OBS1
	0	0	R	N	DFE_WT4_OBS0
75	7:5	0	RW	N	RESERVED
	4	0	R	N	DFE_POL_5_OBS	Primary observation point for DFE tap 5 polarity
	3	0	R	N	DFE_WT5_OBS3	Primary observation point for DFE tap 5 weight
	2	0	R	N	DFE_WT5_OBS2
	1	0	R	N	DFE_WT5_OBS1
	0	0	R	N	DFE_WT5_OBS0
76	7	0	RW	Y	POST_LOCK_VEO_THR3	VEO threshold after lock is established. The LSB step size is 4 counts of VEO.
	6	0	RW	Y	POST_LOCK_VEO_THR2
	5	1	RW	Y	POST_LOCK_VEO_THR1
	4	0	RW	Y	POST_LOCK_VEO_THR0
	3	0	RW	Y	POST_LOCK_HEO_THR3	HEO threshold after lock is established. The LSB step size is 4 counts of HEO.
	2	0	RW	Y	POST_LOCK_HEO_THR2
	1	1	RW	Y	POST_LOCK_HEO_THR1
	0	0	RW	Y	POST_LOCK_HEO_THR0
77	7	0	RW	N	PRBS_GEN_POL_EN	This feature is reserved for future use. To invert the polarity of the PRBS data use the normal method of inverting of the sign bits for the FIR taps.
	6	0	RW	Y	CDR_CAP_DAC_START1[5]	This feature is reserved for future use
	5	0	RW	Y	CDR_CAP_DAC_START0[5]
	4	1	RW	Y	POST_LOCK_SBTTHR4	SBT threshold after lock is established.
	3	1	RW	Y	POST_LOCK_SBTTHR3
	2	0	RW	Y	POST_LOCK_SBTTHR2
	1	1	RW	Y	POST_LOCK_SBTTHR1
	0	0	RW	Y	POST_LOCK_SBTTHR0
78	7	0	R	N	UNCORR_ERR_INT	This feature is reserved for future use.
	6	0	R	N	PRBS_LOCKUP_STATUS	This feature is reserved for future use.
	5	0	R	N	SD_STATUS	Primary observation point for signal detect status
	4	0	R	N	CDR_LOCK_STATUS	Primary observation point for CDR lock status
	3	0	R	N	CDR_LOCK_INT	Requires that channel register 0x79[1] be set. 1: Indicates CDR has achieved lock, lock goes from LOW to HIGH. This bit is cleared after reading. This bit will stay set until it has been cleared by reading.
	2	0	R	N	SD_INT	Requires that channel register 0x79[0] be set. 1: Indicates signal detect status has changed. This will trigger when signal detect goes from LOW to HIGH or HIGH to LOW. This bit is cleared after reading. This bit will stay set until it has been cleared by reading.
	1	0	R	N	EOM_VRANGE_LIMIT_ERROR	This feature is reserved for future use.
	0	0	R	N	HEO_VEO_INT	Requires that channel register 0x36[6] be set. 1: Indicates that HEO/VEO dropped below the limits set in channel register 0x76 This bit is cleared after reading. This bit will stay set until it has been cleared by reading.
79	7	0	R	N	PWDN_SD	This feature is reserved for future use.
	6	0	R	N	PRBS_CHKR_EN	1: Enable the PRBS checker. 0: Disable the PRBS checker
	5	0	R	N	PRBS_GEN_EN	1: Enable the pattern generator 0: Disable the pattern generator
	4	1	RW	N	PRBS_LCKUP_EXIT_EN	This feature is reserved for future use.
	3	0	R	Y	EN_K285	1: Enables K28.5 checking as a requirement for lock 0: Normal operation
	2	0	R	Y	CAL_OVERRIDE	This feature is reserved for future use.
	1	0	R	N	CDR_LOCK_INT_EN	1: Enable CDR lock interrupt, observable in channel register 0x78[3] 0: Disable CDR lock interrupt
	0	0	R	N	SD_INT_EN	1: Enable signal detect interrupt, observable in channel register 0x78[3] 0: Disable signal detect interrupt
7A	7	0	RW	N	SEL_A7	This feature is reserved for future use.
	6	0	RW	N	SEL_A6
	5	0	RW	N	SEL_A5
	4	0	RW	N	SEL_A4
	3	0	RW	N	SEL_A3
	2	0	RW	N	SEL_A2
	1	0	RW	N	SEL_A1
	0	0	RW	N	SEL_A0
7B	7	0	RW	N	SEL_D7	This feature is reserved for future use.
	6	0	RW	N	SEL_D6
	5	0	RW	N	SEL_D5
	4	0	RW	N	SEL_D4
	3	0	RW	N	SEL_D3
	2	0	RW	N	SEL_D2
	1	0	RW	N	SEL_D1
	0	0	RW	N	SEL_D0
7C	7	0	W	N	PRBS_FIXED7	Pattern generator user defined pattern LSB. MSB located at channel register 0x97.
	6	0	W	N	PRBS_FIXED6
	5	0	W	N	PRBS_FIXED5
	4	0	W	N	PRBS_FIXED4
	3	0	W	N	PRBS_FIXED3
	2	0	W	N	PRBS_FIXED2
	1	0	W	N	PRBS_FIXED1
	0	0	W	N	PRBS_FIXED0
7D	7	0	RW	Y	CONT_ADAPT_HEO_CHNG_THRS3	Limit for HEO change before triggering a DFE adaption while continous DFE adaption is enabled.
	6	1	RW	Y	CONT_ADAPT_HEO_CHNG_THRS2
	5	0	RW	Y	CONT_ADAPT_HEO_CHNG_THRS1
	4	0	RW	Y	CONT_ADAPT_HEO_CHNG_THRS0
	3	1	RW	Y	CONT_ADAPT_VEO_CHNG_THRS3	Limit for VEO change before triggering a DFE adaption while continous DFE adaption is enabled.
	2	0	RW	Y	CONT_ADAPT_VEO_CHNG_THRS2
	1	0	RW	Y	CONT_ADAPT_VEO_CHNG_THRS1
	0	0	RW	Y	CONT_ADAPT_VEO_CHNG_THRS0
7E	7	0	RW	Y	CONT_ADPT_TAP_INCR3	Limit of allowable DFE tap weight change from the previous base point
	6	0	RW	Y	CONT_ADPT_TAP_INCR2
	5	0	RW	Y	CONT_ADPT_TAP_INCR1
	4	1	RW	Y	CONT_ADPT_TAP_INCR0
	3	0	RW	Y	CONT_ADPT_FOM_CHNG_THRS3	This feature is reserved for future use.
	2	0	RW	Y	CONT_ADPT_FOM_CHNG_THRS2
	1	1	RW	Y	CONT_ADPT_FOM_CHNG_THRS1
	0	1	RW	Y	CONT_ADPT_FOM_CHNG_THRS0
7F	7	0	RW	N	EN_OBS_ALT_FOM	1: Allows for alternate FoM calculation to be shown in channel registers 0x27, 0x28 and 0x29 instead of HEO and VEO
	6	0	RW	N	RESERVED
	5	1	RW	Y	DIS_HV_CHK_FOR_CONT_ADAPT	1: Ignore HEO/VEO lock condition checks during continous adaption. Normal operation for continous DFE adaption
	4	1	RW	Y	EN_DFE_CONT_ADAPT	1: Continous DFE adaption is enabled 0: DFE adapts only during lock and then freezes
	3	1	RW	Y	CONT_ADPT_CMP_BOTH	1: If continous DFE adaption is enabled, a DFE adaption will trigger if either HEO or VEO degrades
	2	0	RW	Y	CONT_ADPT_COUNT2	Limit for number of weights the DFE can look ahead in continous adaption
	1	1	RW	Y	CONT_ADPT_COUNT1
	0	0	RW	Y	CONT_ADPT_COUNT0
80	7	0	R	N	HEO_CENTER7	This feature is reserved for future use.
	6	0	R	N	HEO_CENTER6
	5	0	R	N	HEO_CENTER5
	4	0	R	N	HEO_CENTER4
	3	0	R	N	HEO_CENTER3
	2	0	R	N	HEO_CENTER2
	1	0	R	N	HEO_CENTER1
	0	0	R	N	HEO_CENTER0
81	7:0	0	R	N	RESERVED
82	7	0	RW	N	FREEZE_PRBS_CNTR	1: Freeze the PRBS bit and error counts to allow for read back 0: Normal operation. Both bit and error counters are allowed to increment if the PRBS checker is properly configured.
	6	0	RW	N	RST_PRBS_CNTS	1: Reset PRBS bit and error counts 0: Normal operation, counters are released from reset
	5	0	RW	N	RESERVED
	4	0	RW	N	PRBS_PATT_OV	1: Override PRBS pattern auto detection. Forces the pattern checker to only lock onto the pattern defined in bits 3 and 2 of this register. 0: Normal operation, pattern checker will automatically detect the PRBS pattern
	3	0	RW	N	PRBS_PATT1	Usage is enabled with channel reg 0x82[4] Select PRBS pattern to be checked 00: PRBS-7 01: PRBS-9 10: PRBS-15 11: PRBS-31
	2	0	RW	N	PRBS_PATT0
	1	0	RW	N	PRBS_POL_OV	1: Override PRBS pattern auto polarity detection. Forces the pattern checker to only lock onto the polarity defined in bit 0 of this register. 0: Normal operation, pattern checker will automatically detect the PRBS pattern polarity
	0	0	RW	N	PRBS_POL	Usage is enabled with channel register 0x82[1] 0: Forced polarity = true 1 - Forced polarity = inverted
83	7:3	0	R	N	RESERVED
	2	0	R	N	PRBS_ERR_CNT10	PRBS error count MSB
	1	0	R	N	PRBS_ERR_CNT9
	0	0	R	N	PRBS_ERR_CNT8
84	7	0	R	N	PRBS_ERR_CNT7	PRBS error count LSB
	6	0	R	N	PRBS_ERR_CNT6
	5	0	R	N	PRBS_ERR_CNT5
	4	0	R	N	PRBS_ERR_CNT4
	3	0	R	N	PRBS_ERR_CNT3
	2	0	R	N	PRBS_ERR_CNT2
	1	0	R	N	PRBS_ERR_CNT1
	0	0	R	N	PRBS_ERR_CNT0
85	7	0	R	N	RESERVED
	6	0	R	N	PRBS_DATA_CNT46	PRBS bit count, 47-bit word from channel registers 0x85 to 0x8A
	5	0	R	N	PRBS_DATA_CNT45
	4	0	R	N	PRBS_DATA_CNT44
	3	0	R	N	PRBS_DATA_CNT43
	2	0	R	N	PRBS_DATA_CNT42
	1	0	R	N	PRBS_DATA_CNT41
	0	0	R	N	PRBS_DATA_CNT40
86	7	0	R	N	PRBS_DATA_CNT39	PRBS bit count, 47-bit word from channel registers 0x85 to 0x8A
	6	0	R	N	PRBS_DATA_CNT38
	5	0	R	N	PRBS_DATA_CNT37
	4	0	R	N	PRBS_DATA_CNT36
	3	0	R	N	PRBS_DATA_CNT35
	2	0	R	N	PRBS_DATA_CNT34
	1	0	R	N	PRBS_DATA_CNT33
	0	0	R	N	PRBS_DATA_CNT32
87	7	0	R	N	PRBS_DATA_CNT31	PRBS bit count, 47-bit word from channel registers 0x85 to 0x8A
	6	0	R	N	PRBS_DATA_CNT30
	5	0	R	N	PRBS_DATA_CNT29
	4	0	R	N	PRBS_DATA_CNT28
	3	0	R	N	PRBS_DATA_CNT27
	2	0	R	N	PRBS_DATA_CNT26
	1	0	R	N	PRBS_DATA_CNT25
	0	0	R	N	PRBS_DATA_CNT24
88	7	0	R	N	PRBS_DATA_CNT23	PRBS bit count, 47-bit word from channel registers 0x85 to 0x8A
	6	0	R	N	PRBS_DATA_CNT22
	5	0	R	N	PRBS_DATA_CNT21
	4	0	R	N	PRBS_DATA_CNT20
	3	0	R	N	PRBS_DATA_CNT19
	2	0	R	N	PRBS_DATA_CNT18
	1	0	R	N	PRBS_DATA_CNT17
	0	0	R	N	PRBS_DATA_CNT16
89	7	0	R	N	PRBS_DATA_CNT15	PRBS bit count, 47-bit word from channel registers 0x85 to 0x8A
	6	0	R	N	PRBS_DATA_CNT14
	5	0	R	N	PRBS_DATA_CNT13
	4	0	R	N	PRBS_DATA_CNT12
	3	0	R	N	PRBS_DATA_CNT11
	2	0	R	N	PRBS_DATA_CNT10
	1	0	R	N	PRBS_DATA_CNT9
	0	0	R	N	PRBS_DATA_CNT8
8A	7	0	R	N	PRBS_DATA_CNT7	PRBS bit count, 47-bit word from channel registers 0x85 to 0x8A
	6	0	R	N	PRBS_DATA_CNT6
	5	0	R	N	PRBS_DATA_CNT5
	4	0	R	N	PRBS_DATA_CNT4
	3	0	R	N	PRBS_DATA_CNT3
	2	0	R	N	PRBS_DATA_CNT2
	1	0	R	N	PRBS_DATA_CNT1
	0	0	R	N	PRBS_DATA_CNT0
8B	7	0	RW	N	UNCORR_ERR_PATT15	This feature is reserved for future use.
	6	0	RW	N	UNCORR_ERR_PATT14
	5	0	RW	N	UNCORR_ERR_PATT13
	4	0	RW	N	UNCORR_ERR_PATT12
	3	0	RW	N	UNCORR_ERR_PATT11
	2	0	RW	N	UNCORR_ERR_PATT10
	1	0	RW	N	UNCORR_ERR_PATT9
	0	0	RW	N	UNCORR_ERR_PATT8
8C	7	0	RW	N	UNCORR_ERR_PATT7	This feature is reserved for future use.
	6	0	RW	N	UNCORR_ERR_PATT6
	5	0	RW	N	UNCORR_ERR_PATT5
	4	0	RW	N	UNCORR_ERR_PATT4
	3	0	RW	N	UNCORR_ERR_PATT3
	2	0	RW	N	UNCORR_ERR_PATT2
	1	0	RW	N	UNCORR_ERR_PATT1
	0	0	RW	N	UNCORR_ERR_PATT0
8D	7	0	RW	N	RESERVED
	6	0	RW	Y	EQ_EN_HR_MODE	Used with bit 2 to set Full rate, Mid rate or Half rate EQ bandwidth. Bit 6 is MSB. Bit 2 is LSB. 00: Full rate 01: Mid rate 11: Half rate
	5	0	RW	Y	PFD_EN_HR_MODE
	4	0	RW	Y	DIV_EN_HR_MODE
	3	0	RW	Y	DIV_EN_HR_MODE
	2	1	RW	Y	EQ_EN_MR_MODE	Used with bit 6 to set Full rate, Mid rate or Half rate EQ bandwidth. Bit 6 is MSB. Bit 2 is LSB. 00: Full rate 01: Mid rate 10: Alternate mid rate 11: Half rate
	1	1	RW	Y	SD_DC_EN	This feature is reserved for future use.
	0	0	RW	Y	EQ_SEL_LOOP_OUT	This feature is reserved for future use.
8E	7	0	RW	N	SD_CAL_RESET_LV	This feature is reserved for future use.
	6	0	RW	N	SEL_DIV48_LV	Output reference clock selection 1: Selects reference clock from in channel digital 0: Selects reference clock from adjacent channel output
	5	0	RW	Y	EN_CLK_LOOPTHRU_LV	1: Enable the reference clock loop through mux
	4	1	RW	Y	FIR_SEL_EDGE2	Edge rate (slew rate) control
	3	1	RW	Y	FIR_SEL_EDGE1
	2	1	RW	Y	FIR_SEL_EDGE0
	1	0	RW	Y	DFE_SEL_GAIN1	VGA gain control
	0	0	RW	Y	DFE_SEL_GAIN0
8F	7	0	R	N	EQ_BST_TO_ANA7	Primary observation point for the EQ boost setting.
	6	0	R	N	EQ_BST_TO_ANA6
	5	0	R	N	EQ_BST_TO_ANA5
	4	0	R	N	EQ_BST_TO_ANA4
	3	0	R	N	EQ_BST_TO_ANA3
	2	0	R	N	EQ_BST_TO_ANA2
	1	0	R	N	EQ_BST_TO_ANA1
	0	0	R	N	EQ_BST_TO_ANA0
90	7	0	RW	Y	K28P5_COMPR_PERIOD3	Used when one of these modes are enabled, k28.5 lock check(channel register 0x79[5]), 64b66b lock check(channel register 0x36[3]), k28.5 or 64b66b Interrupt(register 0x36[0]) k28.5_compr_period defines period within which k28.5 is expected to be seen. Also used for expected frequency of 64B66B transitions The number of bits to check is equal to 2^(min_k28.5_reqd[11:0]) * 32 Enable K28.5 checking with reg_79[3]
	6	0	RW	Y	K28P5_COMPR_PERIOD2
	5	0	RW	Y	K28P5_COMPR_PERIOD1
	4	0	RW	Y	K28P5_COMPR_PERIOD0
	3	0	RW	Y	MIN_K28P5_REQD11	Used when one of these modes are enabled, k28.5 lock check(channel register 0x79[5]), 64b66b lock check(channel register 0x36[3]), k28.5 or 64b66b Interrupt(register 0x36[0]) Channel register 0x90[3:0] together with channel register 0x91[7:0] defines number of k28.5+ patterns that need to be detected in the number of bits checked(set by channel register 0x90[7:4] Also used for expected frequency of 64B66B transitions Enable k28.5 checking with channel register 0x79[3]
	2	0	RW	Y	MIN_K28P5_REQD10
	1	0	RW	Y	MIN_K28P5_REQD9
	0	0	RW	Y	MIN_K28P5_REQD8
91	7	0	RW	Y	MIN_K28P5_REQD7	See channel register 0x90[3:0]
	6	0	RW	Y	MIN_K28P5_REQD6
	5	0	RW	Y	MIN_K28P5_REQD5
	4	0	RW	Y	MIN_K28P5_REQD4
	3	0	RW	Y	MIN_K28P5_REQD3
	2	0	RW	Y	MIN_K28P5_REQD2
	1	0	RW	Y	MIN_K28P5_REQD1
	0	0	RW	Y	MIN_K28P5_REQD0
92	7:0	0	RW	N	RESERVED
93	7:0	0	RW	N	RESERVED
94	7	0	RW	N	DFE_EN	This feature is reserved for future use.
	6	0	RW	N	DFE_DIS	This feature is reserved for future use.
	5	0	RW	N	EOM_EN	This feature is reserved for future use.
	4	0	RW	N	EOM_DIS	This feature is reserved for future use.
	3	0	RW	N	DRV_EN	This feature is reserved for future use.
	2	0	RW	N	DRV_DIS	This feature is reserved for future use.
	1	0	RW	N	PEAK_DET_EN	This feature is reserved for future use.
	0	0	RW	N	PEAK_DET_DIS	This feature is reserved for future use.
95	7	0	RW	N	SD_EN	This feature is reserved for future use.
	6	0	RW	N	SD_DIS	This feature is reserved for future use.
	5	0	RW	N	DC_OFF_EN	This feature is reserved for future use.
	4	0	RW	N	DC_OFF_DIS	This feature is reserved for future use.
	3	0	RW	N	EQ_EN	This feature is reserved for future use.
	2	0	RW	N	EQ_DIS	This feature is reserved for future use.
	1	0	RW	N	COMP_EN	This feature is reserved for future use.
	0	0	RW	N	COMP_DIS	This feature is reserved for future use.
96	7	0	RW	N	RESERVED
	6	0	RW	N	RESERVED
	5	0	RW	Y	XPNT_SLAVE	Always configure this bit to be master. Master control is assigned by mux selection 1: Channel is a slave 0: Channel is a master (recommended)
	4	0	RW	Y	XPNT_EN	1: Cross Point is enabled 0: Cross Point is disabled
	3	0	RW	Y	EQ_BUFFER_EN[1]	Enable EQ output buffers: 00: Neither buffer in ON (not recommended) 01: Only local buffer is ON 10: Only multi-drive buffer is ON 11: Both buffers are ON
	2	1	RW	Y	EQ_BUFFER_EN[0]
	1	0	RW	Y	EQ_DATA_MUX_IN[1]	Select EQ data and signal detect bus from one channel: 00: channel A 01: Channel B 10: Channel C 11: Channel D Channel A = 0,4,8,12 Channel B = 1,5,9,13 Channel C = 2,6,10,14 Channel D = 3,7,11,15
	0	0	RW	Y	EQ_DATA_MUX_IN[0]
97	7	0	W	N	PRBS_FIXED15	Pattern generator user defined pattern MSB. LSB located at channel register 0x7C.
	6	0	W	N	PRBS_FIXED14
	5	0	W	N	PRBS_FIXED13
	4	0	W	N	PRBS_FIXED12
	3	0	W	N	PRBS_FIXED11
	2	0	W	N	PRBS_FIXED10
	1	0	W	N	PRBS_FIXED9
	0	0	W	N	PRBS_FIXED8
98	7:6	0	RW	N	RESERVED
	5:0	0x0C0	RW	Y	RESERVED
99	7	0	RW	Y	DIVSEL_START1_OV	This feature is reserved for future use.
	6	0	RW	Y	DIVSEL_STOP1_OV
	5	1	RW	Y	DIVSEL_START2	This feature is reserved for future use.
	4	1	RW	Y	DIVSEL_START1
	3	1	RW	Y	DIVSEL_START0
	2	1	RW	Y	DIVSEL_STOP2	This feature is reserved for future use.
	1	1	RW	Y	DIVSEL_STOP1
	0	1	RW	Y	DIVSEL_STOP0
9A	7	0	RW	Y	DIVSEL_START0_OV	This feature is reserved for future use.
	6	0	RW	Y	DIVSEL_STOP0_OV	This feature is reserved for future use.
	5	1	RW	Y	DIVSEL_START0[2]	This feature is reserved for future use.
	4	1	RW	Y	DIVSEL_START0[1]
	3	1	RW	Y	DIVSEL_START0[0]
	2	1	RW	Y	DIVSEL_STOP0[2]	This feature is reserved for future use.
	1	1	RW	Y	DIVSEL_STOP0[1]
	0	1	RW	Y	DIVSEL_STOP0[0]
9B	7:3	0	RW	N	RESERVED
	2	0	RW	Y	RESERVED
	1	0	RW	Y	EQ_CTRL_MUX_IN[1]	Select EQ control bus from one channel: 00: channel A 01: Channel B 10: Channel C 11: Channel D Channel A = 0,4,8,12 Channel B = 1,5,9,13 Channel C = 2,6,10,14 Channel D = 3,7,11,15
	0	0	RW	Y	EQ_CTRL_MUX_IN[0]