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Event-TriggerSubmoduleRegisters
Table4-23.Event-TriggerSelectionRegister(ETSEL)FieldDescriptions(continued)
BitsNameValueDescription
2-0INTSELePWMInterrupt(EPWMx_INT)SelectionOptions
000Reserved
001Enableeventtime-basecounterequaltozero.(TBCTR=0x0000)
010Enableeventtime-basecounterequaltoperiod(TBCTR=TBPRD)
011Reserved
100Enableeventtime-basecounterequaltoCMPAwhenthetimerisincrementing.
101Enableeventtime-basecounterequaltoCMPAwhenthetimerisdecrementing.
110Enableevent:time-basecounterequaltoCMPBwhenthetimerisincrementing.
111Enableevent:time-basecounterequaltoCMPBwhenthetimerisdecrementing.
Figure4-24.Event-TriggerPrescaleRegister(ETPS)
15141312111098
SOCBCNTSOCBPRDSOCACNTSOCAPRD
R-0R/W-0R-0R/W-0
743210
ReservedINTCNTINTPRD
R-0R-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table4-24.Event-TriggerPrescaleRegister(ETPS)FieldDescriptions
BitsNameDescription
15-14SOCBCNTePWMADCStart-of-ConversionBEvent(EPWMxSOCB)CounterRegister
ThesebitsindicatehowmanyselectedETSEL[SOCBSEL]eventshaveoccurred:
00Noeventshaveoccurred.
011eventhasoccurred.
102eventshaveoccurred.
113eventshaveoccurred.
13-12SOCBPRDePWMADCStart-of-ConversionBEvent(EPWMxSOCB)PeriodSelect
ThesebitsdeterminehowmanyselectedETSEL[SOCBSEL]eventsneedtooccurbeforean
EPWMxSOCBpulseisgenerated.Tobegenerated,thepulsemustbeenabled
(ETSEL[SOCBEN]=1).TheSOCBpulsewillbegeneratedevenifthestatusflagissetfrom
apreviousstartofconversion(ETFLG[SOCB]=1).OncetheSOCBpulseisgenerated,the
ETPS[SOCBCNT]bitswillautomaticallybecleared.
00DisabletheSOCBeventcounter.NoEPWMxSOCBpulsewillbegenerated
01GeneratetheEPWMxSOCBpulseonthefirstevent:ETPS[SOCBCNT]=0,1
10GeneratetheEPWMxSOCBpulseonthesecondevent:ETPS[SOCBCNT]=1,0
11GeneratetheEPWMxSOCBpulseonthethirdevent:ETPS[SOCBCNT]=1,1
11-10SOCACNTePWMADCStart-of-ConversionAEvent(EPWMxSOCA)CounterRegister
ThesebitsindicatehowmanyselectedETSEL[SOCASEL]eventshaveoccurred:
00Noeventshaveoccurred.
011eventhasoccurred.
102eventshaveoccurred.
113eventshaveoccurred.
112RegistersSPRU791D–November2004–RevisedOctober2007
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