Specifications

Contents
Preface ............................................................................................................................... 9
1 Introduction ............................................................................................................. 13
1.1 Introduction .................................................................................................................. 14
1.2 Submodule Overview ...................................................................................................... 14
1.3 Register Mapping ........................................................................................................... 17
2 ePWM Submodules ................................................................................................... 19
2.1 Overview..................................................................................................................... 20
2.2 Time-Base (TB) Submodule .............................................................................................. 23
2.2.1 Purpose of the Time-Base Submodule ......................................................................... 23
2.2.2 Controlling and Monitoring the Time-base Submodule ....................................................... 24
2.2.3 Calculating PWM Period and Frequency ....................................................................... 25
2.2.4 Phase Locking the Time-Base Clocks of Multiple ePWM Modules ......................................... 30
2.2.5 Time-base Counter Modes and Timing Waveforms .......................................................... 30
2.3 Counter-Compare (CC) Submodule ..................................................................................... 33
2.3.1 Purpose of the Counter-Compare Submodule ................................................................ 33
2.3.2 Controlling and Monitoring the Counter-Compare Submodule .............................................. 34
2.3.3 Operational Highlights for the Counter-Compare Submodule ............................................... 35
2.3.4 Count Mode Timing Waveforms ................................................................................ 35
2.4 Action-Qualifier (AQ) Submodule ........................................................................................ 38
2.4.1 Purpose of the Action-Qualifier Submodule ................................................................... 38
2.4.2 Action-Qualifier Submodule Control and Status Register Definitions ...................................... 38
2.4.3 Action-Qualifier Event Priority ................................................................................... 41
2.4.4 Waveforms for Common Configurations ....................................................................... 42
2.5 Dead-Band Generator (DB) Submodule ................................................................................ 51
2.5.1 Purpose of the Dead-Band Submodule ........................................................................ 51
2.5.2 Controlling and Monitoring the Dead-Band Submodule ...................................................... 51
2.5.3 Operational Highlights for the Dead-Band Submodule ....................................................... 52
2.6 PWM-Chopper (PC) Submodule ......................................................................................... 56
2.6.1 Purpose of the PWM-Chopper Submodule .................................................................... 56
2.6.2 Controlling the PWM-Chopper Submodule .................................................................... 56
2.6.3 Operational Highlights for the PWM-Chopper Submodule ................................................... 56
2.6.4 Waveforms ......................................................................................................... 57
2.7 Trip-Zone (TZ) Submodule ................................................................................................ 60
2.7.1 Purpose of the Trip-Zone Submodule .......................................................................... 60
2.7.2 Controlling and Monitoring the Trip-Zone Submodule ........................................................ 61
2.7.3 Operational Highlights for the Trip-Zone Submodule ......................................................... 61
2.7.4 Generating Trip Event Interrupts ................................................................................ 63
2.8 Event-Trigger (ET) Submodule ........................................................................................... 64
2.8.1 Operational Overview of the Event-Trigger Submodule ...................................................... 65
3 Applications to Power Topologies .............................................................................. 71
SPRU791F – November 2004 – Revised July 2009 Contents 3
Submit Documentation Feedback