ZHCSIA3C Februray   2017  – May 2018 LMK04832

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     简化原理图
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Timing Diagram
    8. 6.8 Typical Characteristics – Clock Output AC Characteristics
  7. 7 Parameter Measurement Information
    1. 7.1 Charge Pump Current Specification Definitions
      1. 7.1.1 Charge Pump Output Current Magnitude Variation vs Charge Pump Output Voltage
      2. 7.1.2 Charge Pump Sink Current vs Charge Pump Output Source Current Mismatch
      3. 7.1.3 Charge Pump Output Current Magnitude Variation vs Ambient Temperature
    2. 7.2 Differential Voltage Measurement Terminology
  8. 8 Detailed Description
    1. 8.1 Overview
      1. 8.1.1  Differences to LMK0482x
      2. 8.1.2  Jitter Cleaning
      3. 8.1.3  JEDEC JESD204B Support
      4. 8.1.4  Clock Inputs
        1. 8.1.4.1 Three Redundant PLL1 Reference Inputs
        2. 8.1.4.2 PLL2 Reference Inputs
        3. 8.1.4.3 Clock Distribution Reference Input
      5. 8.1.5  VCXO Buffered Output
      6. 8.1.6  Frequency Holdover
      7. 8.1.7  Internal VCOs
      8. 8.1.8  External VCO Mode
      9. 8.1.9  Clock Distribution
        1. 8.1.9.1 Clock Divider
        2. 8.1.9.2 High Performance Divider Bypass Mode
        3. 8.1.9.3 SYSREF Clock Divider
        4. 8.1.9.4 Device Clock Delay
        5. 8.1.9.5 Dynamic Digital Delay
        6. 8.1.9.6 SYSREF Delay: Global and Local
        7. 8.1.9.7 Programmable Output Formats
        8. 8.1.9.8 Clock Output Synchronization
      10. 8.1.10 0-Delay
      11. 8.1.11 Status Pins
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Synchronizing PLL R Dividers
        1. 8.3.1.1 PLL1 R Divider Synchronization
        2. 8.3.1.2 PLL2 R Divider Synchronization
      2. 8.3.2 SYNC/SYSREF
      3. 8.3.3 JEDEC JESD204B
        1. 8.3.3.1 How to Enable SYSREF
          1. 8.3.3.1.1 Setup of SYSREF Example
          2. 8.3.3.1.2 SYSREF_CLR
        2. 8.3.3.2 SYSREF Modes
          1. 8.3.3.2.1 SYSREF Pulser
          2. 8.3.3.2.2 Continuous SYSREF
          3. 8.3.3.2.3 SYSREF Request
      4. 8.3.4 Digital Delay
        1. 8.3.4.1 Fixed Digital Delay
          1. 8.3.4.1.1 Fixed Digital Delay Example
        2. 8.3.4.2 Dynamic Digital Delay
        3. 8.3.4.3 Single and Multiple Dynamic Digital Delay Example
      5. 8.3.5 SYSREF to Device Clock Alignment
      6. 8.3.6 Input Clock Switching
        1. 8.3.6.1 Input Clock Switching - Manual Mode
        2. 8.3.6.2 Input Clock Switching - Pin Select Mode
        3. 8.3.6.3 Input Clock Switching - Automatic Mode
      7. 8.3.7 Digital Lock Detect
        1. 8.3.7.1 Calculating Digital Lock Detect Frequency Accuracy
      8. 8.3.8 Holdover
        1. 8.3.8.1 Enable Holdover
          1. 8.3.8.1.1 Fixed (Manual) CPout1 Holdover Mode
          2. 8.3.8.1.2 Tracked CPout1 Holdover Mode
        2. 8.3.8.2 During Holdover
        3. 8.3.8.3 Exiting Holdover
        4. 8.3.8.4 Holdover Frequency Accuracy and DAC Performance
      9. 8.3.9 PLL2 Loop Filter
    4. 8.4 Device Functional Modes
      1. 8.4.1 DUAL PLL
        1. 8.4.1.1 Dual Loop
        2. 8.4.1.2 Dual Loop With Cascaded 0-Delay
        3. 8.4.1.3 Dual Loop With Nested 0-Delay
      2. 8.4.2 Single PLL
        1. 8.4.2.1 PLL2 Single Loop
        2. 8.4.2.2 PLL2 With External VCO
      3. 8.4.3 Distribution Mode
    5. 8.5 Programming
      1. 8.5.1 Recommended Programming Sequence
    6. 8.6 Register Maps
      1. 8.6.1 Register Map for Device Programming
      2. 8.6.2 Device Register Descriptions
        1. 8.6.2.1 System Functions
          1. 8.6.2.1.1 RESET, SPI_3WIRE_DIS
          2. 8.6.2.1.2 POWERDOWN
          3. 8.6.2.1.3 ID_DEVICE_TYPE
          4. 8.6.2.1.4 ID_PROD
          5. 8.6.2.1.5 ID_MASKREV
          6. 8.6.2.1.6 ID_VNDR
        2. 8.6.2.2 (0x100 - 0x138) Device Clock and SYSREF Clock Output Controls
          1. 8.6.2.2.1 DCLKX_Y_DIV
          2. 8.6.2.2.2 DCLKX_Y_DDLY
          3. 8.6.2.2.3 CLKoutX_Y_PD, CLKoutX_Y_ODL, CLKoutX_Y_IDL, DCLKX_Y_DDLY_PD, DCLKX_Y_DDLY[9:8], DCLKX_Y_DIV[9:8]
          4. 8.6.2.2.4 CLKoutX_SRC_MUX, CLKoutX_Y_PD, DCLKX_Y_BYP, DCLKX_Y_DCC, DCLKX_Y_POL, DCLKX_Y_HS
          5. 8.6.2.2.5 CLKoutY_SRC_MUX, SCLKX_Y_PD, SCLKX_Y_DIS_MODE, SCLKX_Y_POL, SCLKX_Y_HS
          6. 8.6.2.2.6 SCLKX_Y_ADLY_EN, SCLKX_Y_ADLY
          7. 8.6.2.2.7 SCLKX_Y_DDLY
          8. 8.6.2.2.8 CLKoutY_FMT, CLKoutX_FMT
        3. 8.6.2.3 SYSREF, SYNC, and Device Config
          1. 8.6.2.3.1  VCO_MUX, OSCout_MUX, OSCout_FMT
          2. 8.6.2.3.2  SYSREF_REQ_EN, SYNC_BYPASS, SYSREF_MUX
          3. 8.6.2.3.3  SYSREF_DIV
          4. 8.6.2.3.4  SYSREF_DDLY
          5. 8.6.2.3.5  SYSREF_PULSE_CNT
          6. 8.6.2.3.6  PLL2_RCLK_MUX, PLL2_NCLK_MUX, PLL1_NCLK_MUX, FB_MUX, FB_MUX_EN
          7. 8.6.2.3.7  PLL1_PD, VCO_LDO_PD, VCO_PD, OSCin_PD, SYSREF_GBL_PD, SYSREF_PD, SYSREF_DDLY_PD, SYSREF_PLSR_PD
          8. 8.6.2.3.8  DDLYdSYSREF_EN, DDLYdX_EN
          9. 8.6.2.3.9  DDLYd_STEP_CNT
          10. 8.6.2.3.10 SYSREF_CLR, SYNC_1SHOT_EN, SYNC_POL, SYNC_EN, SYNC_PLL2_DLD, SYNC_PLL1_DLD, SYNC_MODE
          11. 8.6.2.3.11 SYNC_DISSYSREF, SYNC_DISX
          12. 8.6.2.3.12 PLL1R_SYNC_EN, PLL1R_SYNC_SRC, PLL2R_SYNC_EN
        4. 8.6.2.4 (0x146 - 0x149) CLKin Control
          1. 8.6.2.4.1 CLKin_SEL_PIN_EN, CLKin_SEL_PIN_POL, CLKin2_EN, CLKin1_EN, CLKin0_EN, CLKin2_TYPE, CLKin1_TYPE, CLKin0_TYPE
          2. 8.6.2.4.2 CLKin_SEL_AUTO_REVERT_EN, CLKin_SEL_AUTO_EN, CLKin_SEL_MANUAL, CLKin1_DEMUX, CLKin0_DEMUX
          3. 8.6.2.4.3 CLKin_SEL0_MUX, CLKin_SEL0_TYPE
          4. 8.6.2.4.4 SDIO_RDBK_TYPE, CLKin_SEL1_MUX, CLKin_SEL1_TYPE
        5. 8.6.2.5 RESET_MUX, RESET_TYPE
        6. 8.6.2.6 (0x14B - 0x152) Holdover
          1. 8.6.2.6.1 LOS_TIMEOUT, LOS_EN, TRACK_EN, HOLDOVER_FORCE, MAN_DAC_EN, MAN_DAC[9:8]
          2. 8.6.2.6.2 MAN_DAC
          3. 8.6.2.6.3 DAC_TRIP_LOW
          4. 8.6.2.6.4 DAC_CLK_MULT, DAC_TRIP_HIGH
          5. 8.6.2.6.5 DAC_CLK_CNTR
          6. 8.6.2.6.6 CLKin_OVERRIDE, HOLDOVER_EXIT_MODE, HOLDOVER_PLL1_DET, LOS_EXTERNAL_INPUT, HOLDOVER_VTUNE_DET, CLKin_SWITCH_CP_TRI, HOLDOVER_EN
          7. 8.6.2.6.7 HOLDOVER_DLD_CNT
        7. 8.6.2.7 (0x153 - 0x15F) PLL1 Configuration
          1. 8.6.2.7.1 CLKin0_R
          2. 8.6.2.7.2 CLKin1_R
          3. 8.6.2.7.3 CLKin2_R
          4. 8.6.2.7.4 PLL1_N
          5. 8.6.2.7.5 PLL1_WND_SIZE, PLL1_CP_TRI, PLL1_CP_POL, PLL1_CP_GAIN
          6. 8.6.2.7.6 PLL1_DLD_CNT
          7. 8.6.2.7.7 HOLDOVER_EXIT_NADJ
          8. 8.6.2.7.8 PLL1_LD_MUX, PLL1_LD_TYPE
        8. 8.6.2.8 (0x160 - 0x16E) PLL2 Configuration
          1. 8.6.2.8.1 PLL2_R
          2. 8.6.2.8.2 PLL2_P, OSCin_FREQ, PLL2_REF_2X_EN
          3. 8.6.2.8.3 PLL2_N_CAL
          4. 8.6.2.8.4 PLL2_N
          5. 8.6.2.8.5 PLL2_WND_SIZE, PLL2_CP_GAIN, PLL2_CP_POL, PLL2_CP_TRI
          6. 8.6.2.8.6 PLL2_DLD_CNT
          7. 8.6.2.8.7 PLL2_LD_MUX, PLL2_LD_TYPE
        9. 8.6.2.9 (0x16F - 0x555) Misc Registers
          1. 8.6.2.9.1 PLL2_PRE_PD, PLL2_PD
          2. 8.6.2.9.2 PLL1R_RST
          3. 8.6.2.9.3 CLR_PLL1_LD_LOST, CLR_PLL2_LD_LOST
          4. 8.6.2.9.4 RB_PLL1_LD_LOST, RB_PLL1_LD, RB_PLL2_LD_LOST, RB_PLL2_LD
          5. 8.6.2.9.5 RB_DAC_VALUE (MSB), RB_CLKinX_SEL, RB_CLKinX_LOS
          6. 8.6.2.9.6 RB_DAC_VALUE
          7. 8.6.2.9.7 RB_HOLDOVER
          8. 8.6.2.9.8 SPI_LOCK
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Digital Lock Detect Frequency Accuracy
        1. 9.1.1.1 Minimum Lock Time Calculation Example
      2. 9.1.2 Driving CLKin AND OSCin Inputs
        1. 9.1.2.1 Driving CLKin and OSCin PINS With a Differential Source
        2. 9.1.2.2 Driving CLKin Pins With a Single-Ended Source
      3. 9.1.3 OSCin Doubler for Best Phase Noise Performance
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Device Selection
          1. 9.2.2.1.1 Clock Architect
        2. 9.2.2.2 Device Configuration and Simulation
        3. 9.2.2.3 Device Programming
      3. 9.2.3 Application Curves
    3. 9.3 Do's and Don'ts
      1. 9.3.1 Pin Connection Recommendations
  10. 10Power Supply Recommendations
    1. 10.1 Current Consumption
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Thermal Management
    2. 11.2 Layout Example
  12. 12器件和文档支持
    1. 12.1 器件支持
      1. 12.1.1 开发支持
        1. 12.1.1.1 时钟架构
        2. 12.1.1.2 PLLatinum 仿真
        3. 12.1.1.3 TICS Pro
    2. 12.2 社区资源
    3. 12.3 商标
    4. 12.4 静电放电警告
    5. 12.5 术语表
  13. 13机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

8.6.2.3.5 SYSREF_PULSE_CNT

This register sets the number of SYSREF pulses if SYSREF is not in continuous mode. See SYSREF_REQ_EN, SYNC_BYPASS, SYSREF_MUX for further description of SYSREF's outputs.

Programming the register causes the specified number of pulses to be output if "SYSREF Pulses" is selected by SYSREF_MUX and SYSREF functionality is powered up.

Table 33. Register 0x13E

BIT NAME POR DEFAULT DESCRIPTION
7:2 NA 0 Reserved
1:0 SYSREF_PULSE_CNT 3 Sets the number of SYSREF pulses generated when not in continuous mode.
See SYSREF_REQ_EN, SYNC_BYPASS, SYSREF_MUX for more information on SYSREF modes.
Field Value Number of Pulses
0 (0x00) 1 pulse
1 (0x01) 2 pulses
2 (0x02) 4 pulses
3 (0x03) 8 pulses
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