SNAS811 July   2020  – May  CDCE6214

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Application Example CDCE6214
  4. 4 Revision History
  5. 5 Description (cont.)
  6. 6 Pin Configuration and Functions
    1.     Pin Functions G = Ground, P = Power I = Input, I/O = Input/Output, O = Output I, RPUPD = Input with Resistive Pull-up and Pull-down I, RPU = Input with Resistive Pull=up I/O, RPU = Input/Output with resistive pull-up
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  EEPROM Characteristics
    6. 7.6  Reference Input, Single-Ended Characteristics
    7. 7.7  Reference Input, Differential Characteristics
    8. 7.8  Reference Input, Crystal Mode Characteristics
    9. 7.9  General-Purpose Input Characteristics
    10. 7.10 Triple Level Input Characteristics
    11. 7.11 Logic Output Characteristics
    12. 7.12 Phase Locked Loop Characteristics
    13. 7.13 Closed-Loop Output Jitter Characteristics
    14. 7.14 Input and Output Isolation
    15. 7.15 Buffer Mode Characteristics
    16. 7.16 PCIe Spread Spectrum Generator
    17. 7.17 LVCMOS Output Characteristics
    18. 7.18 LP-HCSL Output Characteristics
    19. 7.19 LVDS Output Characteristics
    20. 7.20 Output Synchronization Characteristics
    21. 7.21 Power-On Reset Characteristics
    22. 7.22 I2C-Compatible Serial Interface Characteristics
    23. 7.23 Timing Requirements, I2C-Compatible Serial Interface
    24. 7.24 Power Supply Characteristics
    25. 7.25 Typical Characteristics
  8. 8 Parameter Measurement Information
    1. 8.1 Reference Inputs
    2. 8.2 Outputs
    3. 8.3 Serial Interface
    4. 8.4 PSNR Test
    5. 8.5 Clock Interfacing and Termination
      1. 8.5.1 Reference Input
      2. 8.5.2 Outputs
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Reference Block
        1. 9.3.1.1 Zero Delay Mode, Internal and External Path
      2. 9.3.2 Phase-Locked Loop (PLL)
        1. 9.3.2.1 PLL Configuration and Divider Settings
        2. 9.3.2.2 Spread Spectrum Clocking
        3. 9.3.2.3 Digitally-Controlled Oscillator/ Frequency Increment and Decrement - Serial Interface Mode and GPIO Mode
      3. 9.3.3 Clock Distribution
        1. 9.3.3.1 Glitchless Operation
        2. 9.3.3.2 Divider Synchronization
        3. 9.3.3.3 Global and Individual Output Enable
      4. 9.3.4 Power Supplies and Power Management
      5. 9.3.5 Control Pins
    4. 9.4 Device Functional Modes
      1. 9.4.1 Operation Modes
        1. 9.4.1.1 Fall-Back Mode
        2. 9.4.1.2 Pin Mode
        3. 9.4.1.3 Serial Interface Mode
    5. 9.5 Programming
      1. 9.5.1 I2C Serial Interface
      2. 9.5.2 EEPROM
        1. 9.5.2.1 EEPROM - Cyclic Redundancy Check
        2. 9.5.2.2 Recommended Programming Procedure
        3. 9.5.2.3 EEPROM Access
          1. 9.5.2.3.1 Register Commit Flow
          2. 9.5.2.3.2 Direct Access Flow
        4. 9.5.2.4 Register Bits to EEPROM Mapping
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
    1. 11.1 Power-Up Sequence
    2. 11.2 Decoupling
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Examples
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Development Support
      2. 13.1.2 Device Nomenclature
    2. 13.2 Receiving Notification of Documentation Updates
    3. 13.3 Support Resources
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

9.3.1.1 Zero Delay Mode, Internal and External Path

The CDCE6214 can operate in Zero Delay Mode with internal as well as external feedback. In Zero Delay Mode, PRIREF clock is used as the reference clock to the PFD. SECREF input clock can be used to feed an external source as feedback clock to the PFD. External feedback path is recommended for zero delay operation. Moreover there is an additional internal feedback path which is sourced from output channel 2. It is expected that the Input-output propagation delay would be higher in Internal zero-delay mode than external zero delay mode.

Table 2. Zero Delay Operation (1)(2)(3)

OPERATION REFSEL R2[1:0] - REFSEL_SW R24[1:0] - IP_SECREF_BUF_SEL R24[15] - IP_PRIREF_BUF_SEL R0[8] - ZDM_EN R0[10] - ZDM_CLOCKSEL DESCRIPTION
Normal Operation, XTAL Input L 0h or 1h or 2h 0h X 0h 0h Normal Operation, XTAL Input
Normal Operation, Differential Input L 0h or 1h or 2h 2h or 3h X 0h 0h SECREF/Differential Input
Normal Operation, Differential Input H 0h or 1h or 3h X 1h 0h 0h PRIREF/Differential Input
Normal Operation, LVCMOS Input L 0h or 1h or 2h 1h X 0h 0h SECREF/LVCMOS Input
Normal Operation, LVCMOS Input H 0h or 1h or 3h X 0h 0h 0h PRIREF/LVCMOS Input
External Zero Delay Mode, Differential Input H 0h or 1h or 3h 2h or 3h 1h 1h 1h Input Clock on PRIREF, Feedback clock on SECREF
External Zero Delay Mode, LVCMOS Input H 0h or 1h or 3h 1h 0h 1h 1h Input Clock on PRIREF, Feedback clock on SECREF
Internal Zero Delay Mode, Differential Input H 0h or 1h or 3h X 1h 1h 0h Input clock on PRIREF
Internal Zero Delay Mode, Differential Input H 0h or 1h or 3h X 0h 1h 0h Input clock in PRIREF
1. In zero delay mode, all dividers should be programmed such that PLL can lock. On power-up in zero-delay mode, PLL would lock automatically
2. For internal Zero delay mode, channel 2 is required. Channel 2 should not be powered down
3. "X" allows any possible bit-field value. It has no impact on the functionality
CDCE6214 ext_zdm_inverted.pngFigure 24. Input/Output Alignment in External Zero Delay Mode for LVCMOS Output