Chapter 15 Pulse-Width Modulation Subsystem (PWMSS).
Chapter 15 Pulse-Width Modulation Subsystem (PWMSS).
Chapter 15 Pulse-Width Modulation Subsystem (PWMSS).
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Enhanced PWM (ePWM) Module www.ti.com<br />
Time−base (TB)<br />
TBPRD shadow (16)<br />
16<br />
16<br />
Figure <strong>15</strong>-8. ePWM Submodules and Critical Internal Signal Interconnects<br />
TBPRD active (16)<br />
Counter<br />
up/down<br />
(16 bit)<br />
TBCNT<br />
active (16)<br />
16 8<br />
TBPHS active (24)<br />
Counter compare (CC)<br />
8<br />
CMPA active (24)<br />
CMPA shadow (24)<br />
CMPB active (16)<br />
CTR = PRD<br />
TBCTL[CNTLDE]<br />
CTR = 0<br />
CTR_Dir<br />
TBPHSHR (8)<br />
Phase<br />
control<br />
CTR = CMPA<br />
CMPAHR (8)<br />
CMPB shadow (16)<br />
CTR = CMPB<br />
Action<br />
qualifier<br />
(AQ)<br />
EPWMA<br />
EPWMB<br />
CTR = 0<br />
CTR = CMPB<br />
Dead<br />
band<br />
Disabled<br />
(DB) (PC)<br />
Sync<br />
in/out<br />
select<br />
Mux<br />
TBCTL[SYNCOSEL]<br />
TBCTL[SWFSYNC]<br />
(software forced sync)<br />
CTR = PRD<br />
CTR = 0<br />
CTR = CMPA<br />
CTR = CMPB<br />
CTR_Dir<br />
PWM<br />
chopper<br />
CTR = 0<br />
Event<br />
trigger<br />
and<br />
interrupt<br />
(ET)<br />
HiRes PWM (HRPWM)<br />
Trip<br />
zone<br />
(TZ)<br />
EPWMxSYNCO<br />
EPWMxSYNCI<br />
EPWMxINT<br />
EPWMxA<br />
EPWMxB<br />
EPWMxTZINT<br />
TZ1 to TZn<br />
1626 <strong>Pulse</strong>-<strong>Width</strong> <strong>Modulation</strong> <strong>Subsystem</strong> (<strong>PWMSS</strong>) SPRUH73E–October 2011–Revised May 2012<br />
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