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HT86B10 データシート(PDF) 73 Page - Holtek Semiconductor Inc |
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HT86B10 データシート(HTML) 73 Page - Holtek Semiconductor Inc |
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73 / 83 page  SIZ [m] Skip if increment Data Memory is 0 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 proceeds with the following instruction. Operation [m] ¬ [m]+1 Skip if [m] = 0 Affected flag(s) None SIZA [m] Skip if increment Data Memory is zero with result in 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 0 the program proceeds with the following instruction. Operation ACC ¬ [m]+1 Skip if ACC = 0 Affected flag(s) None SNZ [m].i Skip if bit i of Data Memory is not 0 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 cycle instruction. If the result is 0 the program proceeds with the following instruction. Operation Skip if [m].i ¹ 0 Affected flag(s) None SUB A,[m] Subtract Data Memory from 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 be cleared to 0, otherwise if the result is positive or zero, the C flag will be set to 1. Operation ACC ¬ ACC - [m] Affected flag(s) OV, Z, AC, C SUBM A,[m] Subtract Data Memory from ACC with result in Data Memory 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 be cleared to 0, otherwise if the result is positive or zero, the C flag will be set to 1. Operation [m] ¬ ACC - [m] Affected flag(s) OV, Z, AC, C SUB A,x Subtract immediate data from 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 be set to 1. Operation ACC ¬ ACC - x Affected flag(s) OV, Z, AC, C HT86BXX/HT86BRXX Rev. 1.80 73 March 12, 2010 |
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