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HCS12 датащи(PDF) 159 Page - Freescale Semiconductor, Inc |
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HCS12 датащи(HTML) 159 Page - Freescale Semiconductor, Inc |
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159 / 452 page ![]() S12CPUV2 Reference Manual, Rev. 4.0 Freescale Semiconductor 159 Operation: (X) – (M : M + 1) Description: Compares the content of index register X with a 16-bit value at the address specified and sets the condition codes accordingly. The compare is accomplished internally by a 16-bit subtract of (M : M + 1) from index register X without modifying either index register X or (M : M + 1). CPX Compare Index Register X CPX CCR Details: S X HIN Z V C –––– ∆∆∆∆ N: Set if MSB of result is set; cleared otherwise Z: Set if result is $0000; cleared otherwise V: X15 • M15 • R15 + X15 • M15 • R15 Set if two’s complement overflow resulted from the operation; cleared otherwise C: X15 • M15 + M15 • R15 + R15 • X15 Set if the absolute value of the content of memory is larger than the absolute value of the index register; cleared otherwise Source Form Address Mode Object Code Access Detail HCS12 M68HC12 CPX #opr16i CPX opr8a CPX opr16a CPX oprx0_xysp CPX oprx9,xysp CPX oprx16,xysp CPX [D,xysp] CPX [oprx16,xysp] IMM DIR EXT IDX IDX1 IDX2 [D,IDX] [IDX2] 8E jj kk 9E dd BE hh ll AE xb AE xb ff AE xb ee ff AE xb AE xb ee ff PO RPf RPO RPf RPO fRPP fIfRPf fIPRPf OP RfP ROP RfP RPO fRPP fIfRfP fIPRfP |
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