Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsDev KitsEvaluation board

1951

TBCTR[15:0]

0x0000

0xFFFF

CTR=CMPA

CMPA

(value)

CMPB

(value)

TBPHS

(value)

TBPRD

(value)

CTR=CMPB

EPWMxSYNCI

0x0000

0xFFFF

CTR=CMPA

TBCTR[15:0]

CMPA

(value)

CMPB

(value)

TBPHS

(value)

TBPRD

(value)

CTR=CMPB

EPWMxSYNCI

ePWM Submodules

www.ti.com

• Down-count mode: used to generate an asymmetrical PWM waveform.

• Up-down-count mode: used to generate a symmetrical PWM waveform.

To illustrate the operation of the first three modes, the timing diagrams in Figure 34-13 through Figure 34-

16 show when events are generated and how the EPWMxSYNCI signal interacts.

Figure 34-13. Counter-Compare Event Waveforms in Up-Count Mode

NOTE: An EPWMxSYNCI external synchronization event can cause a discontinuity in the TBCTR count

sequence. This can lead to a compare event being skipped. This skipping is considered normal operation and

must be taken into account.

Figure 34-14. Counter-Compare Events in Down-Count Mode

1730

Enhanced Pulse Width Modulator (ePWM) Module SPNU562–May 2014

Submit Documentation Feedback