SNAU299 January   2024 LMX1214

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1  Evaluation Setup Requirement
    2. 2.2  Connection Diagram
    3. 2.3  Power Requirements
    4. 2.4  How to Enable Full SPI Control
    5. 2.5  Reference Clock
    6. 2.6  Output Connections
    7. 2.7  Switch Information
    8. 2.8  Default Configuration
    9. 2.9  Divider Mode Example
    10. 2.10 Hybrid Mode: SPI and Pin Mode
  8. 3Software
    1. 3.1 Software Installation
    2. 3.2 Software Description
    3. 3.3 USB2ANY Interface
  9. 4Implementation Results
    1. 4.1 Evaluation Setup
      1. 4.1.1 Buffer and Divider Mode
  10. 5Hardware Design Files
    1. 5.1 Schematic
    2. 5.2 PCB Layout
      1. 5.2.1 PCB Layer Stack-Up
    3. 5.3 Bill of Materials
  11. 6Additional Information
    1. 6.1 Troubleshooting Guide
      1. 6.1.1 General Guidance
      2. 6.1.2 If Output Is Not Seen on CLKOUT
      3. 6.1.3 If Device Features Are Not Active
      4. 6.1.4 If Divider Frequency Is Not Accurate
    2. 6.2 Trademarks

2.10 Hybrid Mode: SPI and Pin Mode

The user must first set ALL switches to Low.

The user must next configure the IO expander. This is done by pressing the Configure Driver button in the GUI under the light green PIN MODES section.

GUID-20231220-SS0I-PFXG-SLLB-DCNX92FRR6ZP-low.svg Figure 2-4 How to Configure IO Expander

Successful configuration of the IO expander returns a confirmation message.

GUID-20240123-SS0I-N8TQ-0BD3-2QWZQTMZQV2B-low.svg Figure 2-5 Successful IO Expander Confirmation Message

The user is now able to change the states of the pin mode headers via the IO expander by pulling pins either LOW or HIGH directly without physically needing to move the switches.