SDAA415 September   2026 MSPM0L1126 , MSPM0L1126-Q1 , MSPM0L1127 , MSPM0L1127-Q1 , 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

5.1 Signal Interconnections

Table 5-1 details the signal connections between Primary and Secondary MCUs:

Table 5-1 Primary and Secondary MCU Pin Assignments
Signal Name Primary Function Secondary Function Direction Description
LCD_LFCLK Output Input Primary -> Secondary Low-frequency clock that drives the LCD state machine. Typically 32.768kHz
LCDSON Output Input Primary -> Secondary LCD Segment ON signal. Indicates the start of a new LCD frame and synchronizes the frame timing.
LCD_EN Output Input Primary -> Secondary LCD Enable signal. Controls the overall enable state of the LCD peripheral.
VSS (GND) Common Common Bidirectional Shared ground reference. Mandatory for proper signal integrity and timing accuracy.