ZHCSTG4 October 2023 ADC12DJ5200-SEP
PRODUCTION DATA
The ADC12DJ5200-SEP can be programmed as a single-channel or dual-channel ADC and a number JESD204C output formats. Table 6-21 summarizes the basic operating mode configuration parameters and whether they are user configured or derived.
| PARAMETER | DESCRIPTION | USER CONFIGURED OR DERIVED | VALUE |
|---|---|---|---|
| JMODE | JESD204C operating mode, automatically derives the rest of the JESD204C parameters, single-channel or dual-channel mode | User configured | Set by JMODE (see the JESD204C mode register) |
| DES | 1 = single-channel mode, 0 = dual-channel mode | Derived | See Operating Modes |
| R | Number of bits transmitted per lane per CLK± cycle. The JESD204C line rate is the CLK± frequency times R. This parameter sets the SerDes PLL multiplication factor or controls bypassing of the SerDes PLL. | Derived | See Operating Modes |
| Links | Number of JESD204C links used | Derived | See Operating Modes |
| K | Number of frames per multiframe (8B/10B mode) | User configured | Set by KM1 (see the JESD204C K parameter register), see the allowed values in Operating Modes. This parameter is ignored in 64B/66B modes. |
| E | Number of multiblocks per extended multiblock (64B/66B mode) | Derived | Always set to '1' in ADC12DJ5200-SEP. This parameter is ignored in 8B/10B modes. |
There are a number of parameters required to define the JESD204C transport layer format, all of which are sent across the link during the initial lane alignment sequence in 8B/10B mode. 64B/66B mode does not use the ILAS, however the transport layer uses the same parameters. In the ADC12DJ5200-SEP, most parameters are automatically derived based on the selected JMODE; however, a few are configured by the user. Table 6-22 describes these parameters.
| PARAMETER | DESCRIPTION | USER CONFIGURED OR DERIVED | VALUE |
|---|---|---|---|
| ADJCNT | LMFC adjustment amount (not applicable) | Derived | Always 0 |
| ADJDIR | LMFC adjustment direction (not applicable) | Derived | Always 0 |
| BID | Bank ID | Derived | Always 0 |
| CF | Number of control words per frame | Derived | Always 0 |
| CS | Control bits per sample | Derived | Always set to 0 in ILAS, see Operating Modes for actual usage |
| DID | Device identifier, used to identify the link | User configured | Set by DID (see the JESD204C DID parameter register), see Lane Assignments |
| F | Number of octets (bytes) per frame (per lane) | Derived | See Operating Modes |
| HD | High-density format (samples split between lanes) | Derived | Always 0 |
| JESDV | JESD204 standard revision | Derived | Always 1 |
| K | Number of frames per multiframe | User configured | Set by the KM1 register, see the JESD204C K parameter register |
| L | Number of serial output lanes per link | Derived | See Operating Modes |
| LID | Lane identifier for each lane | Derived | See Lane Assignments |
| M | Number of converters used to determine lane bit packing; may not match number of ADC channels in the device | Derived | See Operating Modes |
| N | Sample resolution (before adding control and tail bits) | Derived | See Operating Modes |
| N' | Bits per sample after adding control and tail bits | Derived | See Operating Modes |
| S | Number of samples per converter (M) per frame | Derived | See Operating Modes |
| SCR | Scrambler enabled | User configured | Set by the JESD204C control register |
| SUBCLASSV | Device subclass version | Derived | Always 1 |
| RES1 | Reserved field 1 | Derived | Always 0 |
| RES2 | Reserved field 2 | Derived | Always 0 |
| CHKSUM | Checksum for ILAS checking (sum of all above parameters modulo 256) | Derived | Computed based on parameters in this table |