Texas Instruments 28xxx Network Router User Manual


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Action-QualifierSubmoduleRegisters
Figure4-9.Action-QualifierOutputAControlRegister(AQCTLA)
1512111098
ReservedCBDCBU
R-0R/W-0R/W-0
76543210
CADCAUPRDZRO
R/W-0R/W-0R/W-0RW-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table4-9.Action-QualifierOutputAControlRegister(AQCTLA)FieldDescriptions
BitsNameValueDescription
15-12ReservedReserved
11-10CBDActionwhenthetime-basecounterequalstheactiveCMPBregisterandthecounteris
decrementing.
00Donothing(actiondisabled)
01Clear:forceEPWMxAoutputlow.
10Set:forceEPWMxAoutputhigh.
11ToggleEPWMxAoutput:lowoutputsignalwillbeforcedhigh,andahighsignalwillbeforcedlow.
9-8CBUActionwhenthecounterequalstheactiveCMPBregisterandthecounterisincrementing.
00Donothing(actiondisabled)
01Clear:forceEPWMxAoutputlow.
10Set:forceEPWMxAoutputhigh.
11ToggleEPWMxAoutput:lowoutputsignalwillbeforcedhigh,andahighsignalwillbeforcedlow.
7-6CADActionwhenthecounterequalstheactiveCMPAregisterandthecounterisdecrementing.
00Donothing(actiondisabled)
01Clear:forceEPWMxAoutputlow.
10Set:forceEPWMxAoutputhigh.
11ToggleEPWMxAoutput:lowoutputsignalwillbeforcedhigh,andahighsignalwillbeforcedlow.
5-4CAUActionwhenthecounterequalstheactiveCMPAregisterandthecounterisincrementing.
00Donothing(actiondisabled)
01Clear:forceEPWMxAoutputlow.
10Set:forceEPWMxAoutputhigh.
11ToggleEPWMxAoutput:lowoutputsignalwillbeforcedhigh,andahighsignalwillbeforcedlow.
3-2PRDActionwhenthecounterequalstheperiod.
Note:Bydefinition,incountup-downmodewhenthecounterequalsperiodthedirectionisdefined
as0orcountingdown.
00Donothing(actiondisabled)
01Clear:forceEPWMxAoutputlow.
10Set:forceEPWMxAoutputhigh.
11ToggleEPWMxAoutput:lowoutputsignalwillbeforcedhigh,andahighsignalwillbeforcedlow.
1-0ZROActionwhencounterequalszero.
Note:Bydefinition,incountup-downmodewhenthecounterequals0thedirectionisdefinedas1
orcountingup.
00Donothing(actiondisabled)
01Clear:forceEPWMxAoutputlow.
10Set:forceEPWMxAoutputhigh.
11ToggleEPWMxAoutput:lowoutputsignalwillbeforcedhigh,andahighsignalwillbeforcedlow.
100RegistersSPRU791D–November2004–RevisedOctober2007
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