CTR = CMPB
CTR = CMPA
CTR_Dir
CTR = 0
CTR = PRD
Dead
Band
(DB)
Counter
Compare
(CC)
Action
Qualifier
(AQ)
EPWMxA
EPWMxB
CTR = CMPB
CTR = 0
EPWMxINT
EPWMxSOCA
EPWMxSOCB
EPWMxA
EPWMxB
TZ1 to TZ6
CTR = CMPA
Time-Base
(TB)
CTR = PRD
CTR = 0
CTR_Dir
EPWMxSYNCI
EPWMxSYNCO
EPWMxTZINT
PWM-
chopper
(PC)
Event
Trigger
and
Interrupt
(ET)
Trip
Zone
(TZ)
GPIO
MUX
ADC
PIE
PIE
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ePWM Submodules
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Enhanced Pulse Width Modulator (ePWM) Module
3.2.7 Trip-Zone (TZ) Submodule
Figure 3-36 shows how the trip-zone (TZ) submodule fits within the ePWM module.
Figure 3-36. Trip-Zone Submodule
Each ePWM module is connected to six TZn signals (TZ1 to TZ6) that are sourced from the GPIO MUX.
These signals indicate external fault or trip conditions, and the ePWM outputs can be programmed to
respond accordingly when faults occur.
3.2.7.1 Purpose of the Trip-Zone Submodule
The key functions of the Trip-Zone submodule are:
• Trip inputs TZ1 to TZ6 can be flexibly mapped to any ePWM module.
• Upon a fault condition, outputs EPWMxA and EPWMxB can be forced to one of the following:
– High
– Low
– High-impedance
– No action taken
• Support for one-shot trip (OSHT) for major short circuits or over-current conditions.
• Support for cycle-by-cycle tripping (CBC) for current limiting operation.
• Each trip-zone input pin can be allocated to either one-shot or cycle-by-cycle operation.
• Interrupt generation is possible on any trip-zone pin .
• Software-forced tripping is also supported.
• The trip-zone submodule can be fully bypassed if it is not required.
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