SDAA415 September   2026 MSPM0L1126 , MSPM0L1127 , MSPM0L1227 , MSPM0L1227-Q1 , MSPM0L1228 , MSPM0L1228-Q1 , MSPM0L2116 , MSPM0L2117 , MSPM0L2227 , MSPM0L2227-Q1 , MSPM0L2228 , MSPM0L2228-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
  5. 2 Key Features
    1. 2.1 Scope
  6. 3 Detailed Description
    1. 3.1 MSPM0L211x LCD Controller Overview
    2. 3.2 Primary and Secondary Topology
    3. 3.3 Primary MCU
      1. 3.3.1 Secondary MCU
    4. 3.4 Why Synchronization is Critical
  7. 4 System Architecture
    1. 4.1 Block Diagram
    2. 4.2 Signal Flow Diagram
  8. 5 Hardware Implementation
    1. 5.1 Signal Interconnections
  9. 6 Theory of Operation
    1. 6.1 Clock Synchronization
    2. 6.2 Frame Synchronization
    3. 6.3 Enable Synchronization
    4. 6.4 COM and SEG Waveform Phase Relationship
  10. 7 Software Configuration
    1. 7.1 Recommended Start-Up Sequence
    2. 7.2 Secondary Initialization Code
    3. 7.3 Primary Initialization Code
    4. 7.4 Updating the Display at Run Time
    5. 7.5 Configuration Parameters Must Match
  11. 8 Launchpad Connections
  12. 9 Timing of Synchronization Signals
  13. 10Cost Analysis
  14. 11Summary
  15. 12References

11 Summary

The Primary/Secondary LCD configuration using two MSPM0L211x MCUs provides a cost effective, reliable method for driving high-segment-count LCD glass beyond the capability of a single device.

The critical success factors for this design are:

  1. Initialization order: The Secondary must be fully configured and waiting before the Primary enables its LCD peripheral.
  2. Matched configuration: muxRate, biasMode, and waveMode must be identical on both devices.
  3. Correct pin-mux: Both devices must have their LCD synchronization pins routed to the correct IOMUX channels before the LCD peripheral is enabled.

When these conditions are met, the Primary/Secondary topology delivers cycle-exact phase synchronization, zero net DC bias on all LCD cells, and a system cost approximately 20% lower than the next most common alternative.