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HT37B90 Datasheet(PDF) 75 Page - Holtek Semiconductor Inc |
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HT37B90 Datasheet(HTML) 75 Page - Holtek Semiconductor Inc |
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75 / 80 page  SIZ [m] SkipifincrementDataMemoryis0 Description The contents of the specified Data Memory are first incremented by 1. If the result 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 proceedswiththefollowinginstruction. Operation [m] ¬ [m]+1 Skipif[m]=0 Affectedflag(s) None SIZA [m] SkipifincrementDataMemoryiszerowithresultin ACC Description The contents of the specified Data Memory are first incremented by 1. If the result is 0, the following instruction is skipped. The result is stored in the Accumulator but the specified Data Memory contents remain unchanged. As this requires the insertion of a dummy in- struction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0theprogramproceedswiththefollowinginstruction. Operation ACC ¬ [m]+1 Skipif ACC =0 Affectedflag(s) None SNZ [m].i Skipifbit i ofDataMemoryisnot0 Description If bit i of the specified Data Memory is not 0, the following instruction is skipped. As this re- quires the insertion of a dummy instruction while the next instruction is fetched, it is a two cycleinstruction.Iftheresultis0theprogramproceedswiththefollowinginstruction. Operation Skipif[m].i ¹ 0 Affectedflag(s) None SUBA,[m] SubtractDataMemoryfrom ACC Description The specified Data Memory 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 flag will beclearedto0,otherwiseiftheresultispositiveorzero,theCflagwillbesetto1. Operation ACC ¬ ACC - [m] Affectedflag(s) OV,Z,AC,C SUBM A,[m] SubtractDataMemoryfrom ACC withresultinDataMemory Description The specified 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 flag will beclearedto0,otherwiseiftheresultispositiveorzero,theCflagwillbesetto1. Operation [m] ¬ ACC - [m] Affectedflag(s) OV,Z,AC,C SUBA,x Subtractimmediatedatafrom ACC Description The immediate data specified by the code is subtracted from the contents of the Accumu- lator. The result is stored in the Accumulator. Note that if the result of subtraction is nega- tive, the C flag will be cleared to 0, otherwise if the result is positive or zero, the C flag will besetto1. Operation ACC ¬ ACC - x Affectedflag(s) OV,Z,AC,C HT37B90/HT37B70/HT37B50/HT37B30 Rev.1.00 75 June22,2017 |
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