MC68HC908GR4MP datasheet(97/286 Pages) FREESCALE

tên linh kiện	MC68HC908GR4MP

Giải thích chi tiết về linh kiện	M68HC08 Microcontrollers

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MC68HC908GR8 • MC68HC908GR4 Data Sheet, Rev. 7

Freescale Semiconductor

Chapter 10

Central Processing Unit (CPU)

The M68HC08 CPU (central processor unit) is an enhanced and fully object-code-compatible version of

the M68HC05 CPU. The CPU08 Reference Manual (document order number CPU08RM/AD) contains a

description of the CPU instruction set, addressing modes, and architecture.

10.1 Features

Features of the CPU include:

•

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

10.2 CPU Registers

Figure 10-1 shows the five CPU registers. CPU registers are not part of the memory map.

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