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HCS12 Datasheet(PDF) 267 Page - Freescale Semiconductor, Inc |
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HCS12 Datasheet(HTML) 267 Page - Freescale Semiconductor, Inc |
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267 / 452 page  Glossary S12CPUV2 Reference Manual, Rev. 4.0 Freescale Semiconductor 267 Operation: Description: Shifts all bits of accumulator A one place to the right. Bit 7 is loaded from the C status bit. The C bit is loaded from the least significant bit of A. Rotate operations include the carry bit to allow extension of shift and rotate operations to multiple bytes. For example, to shift a 24-bit value one bit to the right, the sequence LSR HIGH, ROR MID, and ROR LOW could be used where LOW, MID, and HIGH refer to the low-order, middle, and high-order bytes of the 24-bit value, respectively. RORA Rotate Right A RORA C b7 – – – – – – b0 C 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: N ⊕ C = [N • C] + [N • C] (for N and C after the shift) Set if (N is set and C is cleared) or (N is cleared and C is set); cleared otherwise (for values of N and C after the shift) C: A0 Set if the LSB of A was set before the shift; cleared otherwise Source Form Address Mode Object Code Access Detail HCS12 M68HC12 RORA INH 46 O O |
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