SNAU297 July   2025 LMK5B12212 , LMK5C22212A

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
    5. 1.5 Using LMK5B12212EVM to evaluate LMK5C22212A
  6. 2Hardware
    1. 2.1 Test Equipment Recommended
    2. 2.2 LMK5B12212EVM Default Settings
    3. 2.3 EVM Quick Start
  7. 3Software
    1. 3.1 Getting Started With TICS Pro
    2. 3.2 Programming the LMK5B12212
    3. 3.3 Configuring TICS Pro
      1. 3.3.1  Using the Start Page
        1. 3.3.1.1 Step 1
        2. 3.3.1.2 Step 2
        3. 3.3.1.3 Step 3
        4. 3.3.1.4 Step 4
        5. 3.3.1.5 Step 5
        6. 3.3.1.6 Step 6
        7. 3.3.1.7 Step 7
        8. 3.3.1.8 Step 8
      2. 3.3.2  Using the Status Page
      3. 3.3.3  Using the Input Page
        1. 3.3.3.1 Cascaded Configurations
          1. 3.3.3.1.1 Cascade VCO to APLL Reference
      4. 3.3.4  Using APLLx Pages
        1. 3.3.4.1 APLL DCO
      5. 3.3.5  Using the DPLLx Page
        1. 3.3.5.1 DPLL DCO
      6. 3.3.6  Using the Validation Page
      7. 3.3.7  Using the GPIO Page
        1. 3.3.7.1 SYNC/SYSREF/1-PPS Page
      8. 3.3.8  Using the Outputs Page
      9. 3.3.9  EEPROM Page
      10. 3.3.10 Design Report Page
  8. 4EVM Configuration
    1. 4.1 Evaluation Setup
      1. 4.1.1 Power Supply
      2. 4.1.2 Logic Inputs and Outputs
      3. 4.1.3 Switching Between I2C and SPI
      4. 4.1.4 Generating SYSREF Request
      5. 4.1.5 XO Input
        1. 4.1.5.1 48MHz TCXO (Default)
        2. 4.1.5.2 External Clock Input
        3. 4.1.5.3 Additional XO Input Options
        4. 4.1.5.4 APLL Reference Options
      6. 4.1.6 Reference Clock Inputs
      7. 4.1.7 Clock Outputs
      8. 4.1.8 Status Outputs and LEDS
      9. 4.1.9 Requirements for Making Measurements
    2. 4.2 Typical Phase Noise Characteristics
  9. 5Hardware Design Files
    1. 5.1 Schematics
      1. 5.1.1  Power Supply Schematic
      2. 5.1.2  Alternative Power Supply Schematic
      3. 5.1.3  Power Distribution Schematic
      4. 5.1.4  LMK5B12212 and Input References IN0 to IN1 Schematic
      5. 5.1.5  Clock Outputs OUT0 to OUT3 Schematic
      6. 5.1.6  Clock Outputs OUT4 to OUT7 Schematic
      7. 5.1.7  Clock Outputs OUT8 to OUT11 Schematic
      8. 5.1.8  XO Schematic
      9. 5.1.9  Logic I/O Interfaces Schematic
      10. 5.1.10 USB2ANY Schematic
    2. 5.2 PCB Layouts
      1. 5.2.1 Layout Guidelines
      2. 5.2.2 Layout Example
      3. 5.2.3 Thermal Reliability
    3. 5.3 Bill of Materials (BOM)
      1. 5.3.1 Loop Filter and Vibration Nonsensitive Capacitors

4.1.3 Switching Between I2C and SPI

To switch the EVM between I2C and SPI modes, the switches and jumpers must be configured as follows:

LMK5B12212EVM I2C Mode Jumper ConfigurationFigure 4-3 I2C Mode Jumper Configuration
LMK5B12212EVM SPI Mode Jumper ConfigurationFigure 4-4 SPI Mode Jumper Configuration

In SPI mode, GPIO2 must also be configured as STATUS or INT, SPI Readback Data (SDO), Active High, and CMOS to support SPI readback.

LMK5B12212EVM GPIO2 Setting for SPI Mode Figure 4-5 GPIO2 Setting for SPI Mode

Communication protocols must be set in TICS Pro. From the menu bar, select USB communications → Interface to get the Communication Setup window and change the protocol.

LMK5B12212EVM Communication Setup Window (Changing from I2C to SPI) Figure 4-6 Communication Setup Window (Changing from I2C to SPI)