SNAU307A May   2024  – May 2024 LMKDB1204

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1 Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2 EVM Quick Start
    1. 2.1 Hardware Setup
    2. 2.2 Software Setup
      1. 2.2.1 TICS Pro GUI Setup
      2. 2.2.2 Power Up Sequence
    3. 2.3 EVM Measurements
  8. 3 Hardware
    1. 3.1 Device Operation Modes
    2. 3.2 EVM Configuration
      1. 3.2.1 Power Supply
      2. 3.2.2 Logic Input and Outputs
      3. 3.2.3 Clock Input
      4. 3.2.4 Clock Outputs
      5. 3.2.5 Status Outputs, LEDs, and Test Points
  9. 4 Software
    1. 4.1 TICS Pro LMKDB1204 Software
      1. 4.1.1 Input
        1. 4.1.1.1 Input Selection (CLKIN_SEL Register)
        2. 4.1.1.2 Input Interface Type
        3. 4.1.1.3 Input Termination
        4. 4.1.1.4 Auto Output Disable (AOD)
        5. 4.1.1.5 LOS Event
        6. 4.1.1.6 LOS Readback
      2. 4.1.2 Device Info and EVM Setup
        1. 4.1.2.1 Device Info
        2. 4.1.2.2 EVM Setup
        3. 4.1.2.3 SMBus
      3. 4.1.3 Output
        1. 4.1.3.1 SMBus
          1. 4.1.3.1.1 Output Slew Rate Control
        2. 4.1.3.2 OE and ZOUT_SEL Pin Control
  10. 5 Implementation Results
    1. 5.1 Typical Phase Noise Characteristic
  11. 6 Hardware Design Files
    1. 6.1 Schematics
    2. 6.2 PCB Layouts
    3. 6.3 Bill of Materials (BOM)
  12. 7 Compliance Information
    1. 7.1 Compliance and Certifications
  13. 8 Additional Information
    1. 8.1 Trademarks
  14. 9 References
  15. 10Revision History

3.1 Device Operation Modes

The LMKDB1204 can be configured to start up in one of two modes during power-on/reset (POR). SMB_EN pin determines the mode of operation during power supply ramp up. Below are both of the modes for the device:

  1. SMBus Mode Disabled (EVM default): When SMB_EN pin is set to low during the power up, SMBus mode is disabled, output enable (OE) pin control is possible on all outputs, and CLKIN_SEL_tri pin is enabled to select which CLKIN drives which output bank.
  2. SMBus Mode Enabled: When SMB_EN pin is set to high during power up, SMBus mode is enabled and OE3# and CLKIN_SEL can only be controlled via SMBus.