MC68HC08AZ0 Datasheet, PDF (69/444 Pages) Motorola, Inc – Advance Information

Freescale Semiconductor, Inc.
Central Processor Unit (CPU)
Central Processor Unit (CPU)
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
CPU registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Accumulator (A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Index register (H:X). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Stack pointer (SP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Program counter (PC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Condition code register (CCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Arithmetic/logic unit (ALU). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
CPU during break interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Instruction Set Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Opcode Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Introduction
This section describes the central processor unit (CPU8). The M68HC08
CPU is an enhanced and fully object-code-compatible version of the
M68HC05 CPU. The CPU08 Reference Manual (Motorola document
number CPU08RM/AD) contains a description of the CPU instruction
set, addressing modes, and architecture.
1-cpu
MOTOROLA
Central Processor Unit (CPU)
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MC68HC08AZ0
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