Holtek HT66F20 - Page 270

Rev. 2.50 270 June 22, 2017 Rev. 2.50 271 June 22, 2017
HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
A/D Flash MCU with EEPROM
HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
A/D Flash MCU with EEPROM
SUBM A,[m]
 SubtractDataMemoryfromACCwithresultinDataMemory
Description ThespeciedDataMemoryissubtractedfromthecontentsoftheAccumulator.Theresultis
 storedintheDataMemory.Notethatiftheresultofsubtractionisnegative,theCagwillbe
 clearedto0,otherwiseiftheresultispositiveorzero,theCagwillbesetto1.
Operation [m]←ACC−[m]
Affectedag(s) OV,Z,AC,C
SUB A,x
SubtractimmediatedatafromACC
Description TheimmediatedataspeciedbythecodeissubtractedfromthecontentsoftheAccumulator.
 TheresultisstoredintheAccumulator.Notethatiftheresultofsubtractionisnegative,theC
 agwillbeclearedto0,otherwiseiftheresultispositiveorzero,theCagwillbesetto1.
Operation ACC←ACC−x
Affectedag(s) OV,Z,AC,C
SWAP [m]
SwapnibblesofDataMemory
Description Thelow-orderandhigh-ordernibblesofthespeciedDataMemoryareinterchanged.
Operation [m].3~[m].0↔[m].7~[m].4
Affectedag(s) None
SWAPA [m]
 SwapnibblesofDataMemorywithresultinACC
Description Thelow-orderandhigh-ordernibblesofthespeciedDataMemoryareinterchanged.The
 resultisstoredintheAccumulator.ThecontentsoftheDataMemoryremainunchanged.
Operation ACC.3~ACC.0←[m].7~[m].4
 ACC.7~ACC.4←[m].3~[m].0
Affectedag(s) None
SZ [m]
SkipifDataMemoryis0
Description IfthecontentsofthespeciedDataMemoryis0,thefollowinginstructionisskipped.Asthis
 requirestheinsertionofadummyinstructionwhilethenextinstructionisfetched,itisatwo
 cycleinstruction.Iftheresultisnot0theprogramproceedswiththefollowinginstruction.
Operation Skipif[m]=0
Affectedag(s) None
SZA [m]
SkipifDataMemoryis0withdatamovementtoACC
Description ThecontentsofthespeciedDataMemoryarecopiedtotheAccumulator.Ifthevalueiszero,
 thefollowinginstructionisskipped.Asthisrequirestheinsertionofadummyinstruction
 whilethenextinstructionisfetched,itisatwocycleinstruction.Iftheresultisnot0the
 programproceedswiththefollowinginstruction.
Operation ACC←[m]
 Skipif[m]=0
Affectedag(s) None
SZ [m].i
SkipifbitiofDataMemoryis0
Description IfbitiofthespeciedDataMemoryis0,thefollowinginstructionisskipped.Asthisrequires
 theinsertionofadummyinstructionwhilethenextinstructionisfetched,itisatwocycle
 instruction.Iftheresultisnot0,theprogramproceedswiththefollowinginstruction.
Operation Skipif[m].i=0
Affectedag(s) None