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HT95C30P データシート(PDF) 36 Page - Holtek Semiconductor Inc |
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HT95C30P データシート(HTML) 36 Page - Holtek Semiconductor Inc |
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36 / 42 page  RRCA [m] Rotate right through carry and place result in the accumulator Description Data of the specified data memory and the carry flag are rotated 1 bit right. Bit 0 replaces the carry bit and the original carry flag is rotated into the bit 7 position. The rotated result is stored in the accumulator. The contents of the data memory remain unchanged. Operation ACC.i ¬ [m].(i+1); [m].i:bit i of the data memory (i=0~6) ACC.7 ¬ C C ¬ [m].0 Affected flag(s) TC2 TC1 TO PD OV Z AC C ¾ ¾ ¾¾¾¾¾ Ö SBC A,[m] Subtract data memory and carry from the accumulator Description The contents of the specified data memory and the complement of the carry flag are sub- tracted from the accumulator, leaving the result in the accumulator. Operation ACC ¬ ACC+[m]+C Affected flag(s) TC2 TC1 TO PD OV Z AC C ¾ ¾ ¾ ¾ ÖÖÖÖ SBCM A,[m] Subtract data memory and carry from the accumulator Description The contents of the specified data memory and the complement of the carry flag are sub- tracted from the accumulator, leaving the result in the data memory. Operation [m] ¬ ACC+[m]+C Affected flag(s) TC2 TC1 TO PD OV Z AC C ¾ ¾ ¾ ¾ ÖÖÖÖ SDZ [m] Skip if decrement data memory is 0 Description The contents of the specified data memory are decremented by 1. If the result is 0, the next instruction is skipped. If the result is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruc- tion (2 cycles). Otherwise proceed with the next instruction (1 cycle). Operation Skip if ([m] -1)=0, [m] ¬ ([m]-1) Affected flag(s) TC2 TC1 TO PD OV Z AC C ¾ ¾ ¾¾¾¾¾¾ SDZA [m] Decrement data memory and place result in ACC, skip if 0 Description The contents of the specified data memory are decremented by 1. If the result is 0, the next instruction is skipped. The result is stored in the accumulator but the data memory remains unchanged. If the result is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cy- cles). Otherwise proceed with the next instruction (1 cycle). Operation Skip if ([m] -1)=0, ACC ¬ ([m]-1) Affected flag(s) TC2 TC1 TO PD OV Z AC C ¾ ¾ ¾¾¾¾¾¾ HT95L100/10P Rev. 0.10 36 October 1, 2002 Preliminary |
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