Holtek HT66F0175 - Page 193

Rev. 1.50 192 August 28, 2017 Rev. 1.50 193 August 28, 2017
HT66F0175/HT66F0185
A/D Flash MCU with EEPROM
HT66F0175/HT66F0185
A/D Flash MCU with EEPROM
CPLA [m]
 ComplementDataMemorywithresultinACC
Description EachbitofthespeciedDataMemoryislogicallycomplemented(1′scomplement).Bitswhich
 previouslycontaineda1arechangedto0andviceversa.Thecomplementedresultisstoredin
 theAccumulatorandthecontentsoftheDataMemoryremainunchanged.
Operation ACC←[m]
Affectedag(s) Z
DAA [m]
Decimal-AdjustACCforadditionwithresultinDataMemory
Description ConvertthecontentsoftheAccumulatorvaluetoaBCD(BinaryCodedDecimal)value
 resultingfromthepreviousadditionoftwoBCDvariables.Ifthelownibbleisgreaterthan9
 orifACagisset,thenavalueof6willbeaddedtothelownibble.Otherwisethelownibble
 remainsunchanged.Ifthehighnibbleisgreaterthan9oriftheCagisset,thenavalueof6
 willbeaddedtothehighnibble.Essentially,thedecimalconversionisperformedbyadding
 00H,06H,60Hor66HdependingontheAccumulatorandagconditions.OnlytheCag
 maybeaffectedbythisinstructionwhichindicatesthatiftheoriginalBCDsumisgreaterthan
 100,itallowsmultipleprecisiondecimaladdition.
Operation [m]←ACC+00Hor
 [m]←ACC+06Hor
 [m]←ACC+60Hor
 [m]←ACC+66H
Affectedag(s) C
DEC [m]
 DecrementDataMemory
Description DatainthespeciedDataMemoryisdecrementedby1.
Operation [m]←[m]−1
Affectedag(s) Z
DECA [m]
 DecrementDataMemorywithresultinACC
Description DatainthespeciedDataMemoryisdecrementedby1.Theresultisstoredinthe
 Accumulator.ThecontentsoftheDataMemoryremainunchanged.
Operation ACC←[m]−1
Affectedag(s) Z
HALT
 Enterpowerdownmode
Description Thisinstructionstopstheprogramexecutionandturnsoffthesystemclock.Thecontentsof
 theDataMemoryandregistersareretained.TheWDTandprescalerarecleared.Thepower
 downagPDFissetandtheWDTtime-outagTOiscleared.
Operation TO←0
 PDF←1
Affectedag(s) TO,PDF
INC [m]
 IncrementDataMemory
Description DatainthespeciedDataMemoryisincrementedby1.
Operation [m]←[m]+1
Affectedag(s) Z
INCA [m]
IncrementDataMemorywithresultinACC
Description DatainthespeciedDataMemoryisincrementedby1.TheresultisstoredintheAccumulator.
 ThecontentsoftheDataMemoryremainunchanged.
Operation ACC←[m]+1
Affectedag(s) Z