User's Manual

www.ti.com
EPWMxINT
EPWMxTZINT
EPWMxSOCA
EPWMxSOCB
EPWMxSYNCI
EPWMxSYNCO
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
Peripheral bus
ePWM module
TZ1 to TZ6
EPWMxA
EPWMxB
PIE
ADC
GPIO
MUX
Submodule Overview
Figure 1-2. Submodules and Signal Connections for an ePWM Module
Figure 1-3 shows more internal details of a single ePWM module. The main signals used by the ePWM
module are:
• 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 an external fault condition. Each module on a device
can be configured to either use or ignore any of the trip-zone signals. The trip-zone signals can be
configured as asynchronous inputs through the GPIO peripheral.
• Time-base synchronization input (EPWMxSYNCI) and output (EPWMxSYNCO) signals.
The synchronization signals daisy chain the ePWM modules together. Each module can be configured
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).
• ADC start-of-conversion signals (EPWMxSOCA and EPWMxSOCB).
Each ePWM module has two ADC start of conversion signals (one for each sequencer). Any ePWM
module can trigger a start of conversion for either sequencer. Which event triggers the start of
conversion is configured in the Event-Trigger submodule of the ePWM.
• Peripheral Bus
The peripheral bus is 32-bits wide and allows both 16-bit and 32-bit writes to the ePWM register file.
16 Introduction SPRU791D – November 2004 – Revised October 2007
Submit Documentation Feedback