Submodules And Signal Connections For An Epwm Module - Texas Instruments Concerto F28M35 Series Technical Reference Manual

Table of Contents

Introduction

Figure 7-2. Submodules and Signal Connections for an ePWM Module

Peripheral bus

shows more internal details of a single ePWM module. The main signals used by the ePWM

PWM output signals (EPWMxA and EPWMxB).

The PWM output signals are made available external to the device through the GPIO peripheral

described in the system control and interrupts guide for your device.

Trip-zone signals (TZ1 to TZ6).

These input signals alert the ePWM module of fault conditions external to the ePWM module. Each

module on a device can be configured to either use or ignore any of the trip-zone signals. The TZ1 to

TZ3 trip-zone signals can be configured as asynchronous inputs through the GPIO peripheral using the

GPTRIP logic, Refer to

which can be generated from any one of the EQEP module (for those devices with an EQEP module).

TZ5 is connected to the system clock fail logic, and TZ6 is connected to the EMUSTOP output from

the CPU. This allows you to configure a trip action when the clock fails or the CPU halts.

Time-base synchronization input (EPWMxSYNCI) and output (EPWMxSYNCO) signals.

The synchronization signals daisy chain the ePWM modules together. Each module can be configured

via GPTRIP6 to either use or ignore its synchronization input. The clock synchronization input and

output signal are brought out to pins only for ePWM1 (ePWM module #1). The synchronization output

for ePWM1 (EPWM1SYNCO) is also connected to the SYNCI of the first enhanced capture module

(eCAP1). Refer to Time-Base Counter Synchronization Scheme 4 in this chapter.

ADC start-of-conversion signals (EPWMxSOCA and EPWMxSOCB).

Each ePWM module has two ADC start of conversion signals . Any ePWM module can trigger a start

of conversion. Whichever event triggers the start of conversion is configured in the Event-Trigger

submodule of the ePWM.

C28 Enhanced Pulse Width Modulator (ePWM) Module

Time-base (TB) module

Counter-compare (CC) module

Action-qualifier (AQ) module

Dead-band (DB) module

PWM-chopper (PC) module

Event-trigger (ET) module

Trip-zone (TZ) module

Digital Compare (DC) module

7-48. TZ4 is connected to an inverted EQEPx error signal (EQEPxERR)

SPRUH22I – April 2012 – Revised November 2019

Submit Documentation Feedback

Chapters

Table of Contents