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

3.2.2 Logic Input and Outputs

The logic input and output pins on LMKDB1204 provides option for selecting different device modes, input clock selection, output enable / disable control, loss of signal (LOS) detection, and output impedance selection. The following section describes the function of different input and output logic pins. Voltage levels for input pins can be set through TICSPro GUI using the MSP430 MCU or using on-board jumper as specified in Table 4-1.

Table 3-3 Device Start-Up Modes
SMB_EN INPUT LEVEL START-UP MODE
Low (default) SMBus inactive.
High SMBus active. On-board jumper headers on JP4 and JP5 need to be removed for proper operation.

Table 3-4 Clock Input Selection
CLKIN_SEL_tri Output Level Function
Low CLKIN0 is the input source for all outputs.
High CLKIN1 is the input source for all outputs.
Hi-Z CLKIN0 is the input source for BANK0 outputs and CLKIN1 is the input source for BANK1 outputs. JP4 must be removed and R51 must be depopulated. If SMBus mode needs to be activated after removing R51, then on-board header jumper JP4 needs to be set to high.
Table 3-5 Output Enable Pin Control
OE0# to OE3# INPUT LEVEL OUTPUT STATUS
Low (default) Enabled.
High Disabled
Note: For OE3#, when controlling the pin by only using the on-board jumper header on JP5 (and not the MSP430 MCU) and SMBus is disabled/SMB_EN = high, thenR52 must be depopulated. If SMBus mode needs to be activated after removing R52, then on-board header jumper on JP5 needs to be set to high.
Table 3-6 Loss of Signal (LOS) Detection (Status pin)
LOSb OUTPUT LEVEL LOS STATUS
Low Not detected
High Detected
Table 3-7 LP-HCSL Differential CLock Output Impedance Select
ZOUT_SEL Output Level Function
Low LMKDB1204 has 85Ω output termination.
High LMKDB1204 has 100Ω output termination.