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HCS12 Datasheet(PDF) 145 Page - Freescale Semiconductor, Inc |
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HCS12 Datasheet(HTML) 145 Page - Freescale Semiconductor, Inc |
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145 / 452 page  S12CPUV2 Reference Manual, Rev. 4.0 Freescale Semiconductor 145 Operation: (A) – (B) Description: Compares the content of accumulator A to the content of accumulator B and sets the condition codes, which may then be used for arithmetic and logical conditional branches. The contents of the accumulators are not changed. CBA Compare Accumulators CBA CCR Details: S X HIN Z V C –––– ∆∆∆∆ N: Set if MSB of result is set; cleared otherwise Z: Set if result is $00; cleared otherwise V: A7 • B7 • R7 + A7 • B7 • R7 Set if a two’s complement overflow resulted from the operation; cleared otherwise C: A7 • B7 + B7 • R7 + R7 • A7 Set if there was a borrow from the MSB of the result; cleared otherwise Source Form Address Mode Object Code Access Detail HCS12 M68HC12 CBA INH 18 17 OO OO |
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