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2.8.1 Operational Overview of the Event-Trigger Submodule
EPWM1INT
EPWM1SOCA
EPWM1SOCB
EPWM1
module
EPWM2SOCB
EPWM2SOCA
EPWM2INT
EPWM2
module
EPWMxSOCB
EPWMxSOCA
EPWMxINT
EPWMx
module
PIE
SOCB SOCA
ADC
Event-Trigger (ET) Submodule
The following sections describe the event-trigger submodule's operational highlights.
Each ePWM module has one interrupt request line connected to the PIE and two start of conversion
signals (one for each sequencer) connected to the ADC module. As shown in
Figure 2-39
, ADC start of
conversion for all ePWM modules are ORed together and hence multiple modules can initiate an ADC
start of conversion. If two requests occur on one start of conversion line, then only one will be recognized
by the ADC.
Figure 2-39. Event-Trigger Submodule Inter-Connectivity of ADC Start of Conversion and Interrupt
Signals
The event-trigger submodule monitors various event conditions (the left side inputs to event-trigger
submodule shown in
Figure 2-40
) and can be configured to prescale these events before issuing an
Interrupt request or an ADC start of conversion. The event-trigger prescaling logic can issue Interrupt
requests and ADC start of conversion at:
•
Every event
•
Every second event
•
Every third event
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ePWM Submodules
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