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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HCS12 데이터시트(PDF) 60 Page - Freescale Semiconductor, Inc |
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HCS12 데이터시트(HTML) 60 Page - Freescale Semiconductor, Inc |
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60 / 452 page  S12CPUV2 Reference Manual, Rev. 4.0 60 Freescale Semiconductor 5.7 Binary-Coded Decimal Instructions To add binary-coded decimal (BCD) operands, use addition instructions that set the half-carry bit in the CCR, then adjust the result with the decimal adjust A (DAA) instruction. Table 5-5 is a summary of instructions that can be used to perform BCD operations. Table 5-5. BCD Instructions Mnemonic Function Operation ABA Add B to A (A) + (B) ⇒ A ADCA Add with carry to A (A) + (M) + C ⇒ A ADCB(1) 1. These instructions are not normally used for BCD operations because, although they affect H correctly, they do not leave the result in the correct accumulator (A) to be used with the DAA instruction. Thus additional steps would be needed to adjust the result to correct BCD form. Add with carry to B (B) + (M) + C ⇒ B ADDA(1) Add memory to A (A) + (M) ⇒ A ADDB Add memory to B (B) + (M) ⇒ B DAA Decimal adjust A (A)10 |
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