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HCS12 数据表(PDF) 17 Page - Freescale Semiconductor, Inc |
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HCS12 数据表(HTML) 17 Page - Freescale Semiconductor, Inc |
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17 / 452 page ![]() S12CPUV2 Reference Manual, Rev. 4.0 Freescale Semiconductor 17 1.3.2 Memory and Addressing M — 8-bit memory location pointed to by the effective address of the instruction M : M+1 — 16-bit memory location. Consists of the contents of the location pointed to by the effective address concatenated with the contents of the location at the next higher memory address. The most significant byte is at location M. M~M+3 M(Y)~M(Y+3) — 32-bit memory location. Consists of the contents of the effective address of the instruction concatenated with the contents of the next three higher memory locations. The most significant byte is at location M or M(Y). M(X) — Memory locations pointed to by index register X M(SP) — Memory locations pointed to by the stack pointer M(Y+3) — Memory locations pointed to by index register Y plus 3 PPAGE — Program overlay page (bank) number for extended memory (>64 Kbytes). Page — Program overlay page XH — High-order byte XL — Low-order byte ( ) — Content of register or memory location $ — Hexadecimal value % — Binary value |
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