Action-Qualifier Submodule Inputs And Outputs; Action-Qualifier Submodule Possible Input Events - Texas Instruments Concerto F28M35 Series Technical Reference Manual

ePWM Submodules
Register Address Offset
Name
AQCSFRCM
AQCTLR
The action-qualifier submodule is based on event-driven logic. It can be thought of as a programmable
cross switch with events at the input and actions at the output, all of which are software controlled via the
set of registers shown in
Figure 7-19. Action-Qualifier Submodule Inputs and Outputs
TBCLK
CTR = PRD
CTR = Zero
CTR = CMPA
CTR = CMPB
CTR_dir
For convenience, the possible input events are summarized again in
Signal
CTR = PRD
CTR = Zero
CTR = CMPA
CTR = CMPB
Software forced event
The software forced action is a useful asynchronous event. This control is handled by registers AQSFRC
and AQCSFRC.
The action-qualifier submodule controls how the two outputs EPWMxA and EPWMxB behave when a
particular event occurs. The event inputs to the action-qualifier submodule are further qualified by the
counter direction (up or down). This allows for independent action on outputs on both the count-up and
count-down phases.
The possible actions imposed on outputs EPWMxA and EPWMxB are:
• Set High:
Set output EPWMxA or EPWMxB to a high level.
662
C28 Enhanced Pulse Width Modulator (ePWM) Module
Table 7-8. Action-Qualifier Submodule Registers (continued)
Shadowed
0x76 No
0x47 No
Table 7-8.
Action-qualifier (AQ) Module
AQCTLR[15:0]
Action-qualifier control register
AQCTLA[15:0]
Action-qualifier control A
AQCTLB[15:0]
Action-qualifier control B
AQSFRC[15:0]
Action-qualifier S/W force
AQCSFRC[3:0] (shadow)
continuous S/W force
AQCSFRC[3:0] (active)
continuous S/W force
Table 7-9. Action-Qualifier Submodule Possible Input Events
Description
Time-base counter equal to the period value
Time-base counter equal to zero
Time-base counter equal to the counter-compare A
Time-base counter equal to the counter-compare B
Asynchronous event initiated by software
Copyright © 2012–2019, Texas Instruments Incorporated
Description
Action Qualifier Continuous S/W Force Mirror Register
Action Qualifier Control Register
Table 7-9.
Registers Compared
TBCTR = TBPRD
TBCTR = 0x00
TBCTR = CMPA
TBCTR = CMPB
SPRUH22I – April 2012 – Revised November 2019
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EPWMA
EPWMB
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