SPRADL7 July   2025 F28E120SC

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
  5. 2 Key Differences Between EPWM and MCPWM
  6. 3 Time-Base Submodule Differences
    1. 3.1 Register Differences
    2. 3.2 Driverlib Differences
  7. 4 Counter-Compare Submodule Differences
    1. 4.1 Register Differences
    2. 4.2 Driverlib Differences
  8. 5 Action-Qualifier Submodule Differences
    1. 5.1 Register Differences
    2. 5.2 Driverlib Differences
  9. 6 Dead-Band Submodule Differences
    1. 6.1 Register Differences
    2. 6.2 Driverlib Differences
  10. 7 Trip-Zone Submodule Differences
    1. 7.1 Register Differences
    2. 7.2 Driverlib Differences
  11. 8 Event-Trigger Submodule Differences
    1. 8.1 Register Differences
    2. 8.2 Driverlib Differences
  12. 9 Global Load Differences
    1. 9.1 Register Differences
    2. 9.2 Driverlib Differences
  13. 10Summary
  14. 11References

5 Action-Qualifier Submodule Differences

The Action-Qualifier Submodule determines PWM output behavior on specified events such as CMPx events, CTR=0 or CTR=TBPRD events. The feature difference of MCPWM when compared to EPWM are as follows:

  • Addition of memory mapped shadow registers AQCTLAS, AQCTLBS
  • Separate AQCTLA and AQCTLB registers for each PWM pair: PWM1_AQCTLA, PWM1_AQCTLB, PWM2_AQCTLA, etc.
  • T1/T2 events removed from MCPWM
Action-Qualifier Submodule Block Diagram for EPWM Figure 5-1 Action-Qualifier Submodule Block Diagram for EPWM
Action-Qualifier Submodule Block Diagram for MCPWM Figure 5-2 Action-Qualifier Submodule Block Diagram for MCPWM