MC68HC08AZ32A Datasheet, PDF (77/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Technical Data — MC68HC08AZ32A
Section 6. Central Processor Unit (CPU)
6.1 Contents
6.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
6.3 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
6.4 CPU registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
6.4.1 Accumulator (A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
6.4.2 Index Register (H:X) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
6.4.3 Stack Pointer (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
6.4.4 Program Counter (PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
6.4.5 Condition Code Register (CCR) . . . . . . . . . . . . . . . . . . . .81
6.5 Arithmetic/Logic Unit (ALU). . . . . . . . . . . . . . . . . . . . . . . . . . 83
6.6 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
6.7 CPU During Break Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . 84
6.8 Instruction Set Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
6.9 Opcode Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
6.2 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.
MC68HC08AZ32A — Rev 1.0
MOTOROLA
Central Processor Unit (CPU)
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Technical Data
77