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0x0000
0xFFFF
TBCNT[15:0]
UP
DOWN
UP
DOWN
UP
DOWN
TBPHS (value)
TBPRD (value)
EPWMxSYNCI
CTR_dir
CTR = zero
CNT_max
CTR = PRD
2.3 Counter-Compare (CC) Submodule
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
Counter-Compare (CC) Submodule
Figure 2-10. Time-Base Up-Down Count Waveforms, TBCTL[PHSDIR = 1] Count Up On Synchronization
Event
Figure 2-11 illustrates the counter-compare submodule within the ePWM.
Figure 2-11. Counter-Compare Submodule
Figure 2-12 shows the basic structure of the counter-compare submodule.
32 ePWM Submodules SPRU791D – November 2004 – Revised October 2007
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