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M68HC08 数据表(PDF) 68 Page - Freescale Semiconductor, Inc |
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M68HC08 数据表(HTML) 68 Page - Freescale Semiconductor, Inc |
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68 / 288 page ![]() Central Processor Unit (CPU) Data Sheet MC68HC908BD48 — Rev. 2.1 68 Central Processor Unit (CPU) Freescale Semiconductor 6.3 Features • Object code fully upward-compatible with M68HC05 Family • 16-bit stack pointer with stack manipulation instructions • 16-bit index register with x-register manipulation instructions • 8-MHz CPU internal bus frequency • 64-Kbyte program/data memory space • 16 addressing modes • Memory-to-memory data moves without using accumulator • Fast 8-bit by 8-bit multiply and 16-bit by 8-bit divide instructions • Enhanced binary-coded decimal (BCD) data handling • Modular architecture with expandable internal bus definition for extension of addressing range beyond 64 Kbytes • Low-power stop and wait modes 6.4 CPU Registers Figure 6-1 shows the five CPU registers. CPU registers are not part of the memory map. |
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