Motorola MC68HC908AB32 User Manual

MC68HC908AB32 — Rev. 1.0 Technical Data
MOTOROLA Central Processor Unit (CPU) 89
Technical Data — MC68HC908AB32
Section 7. Central Processor Unit (CPU)
7.1 Contents
7.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
7.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
7.4 CPU Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
7.4.1 Accumulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
7.4.2 Index Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
7.4.3 Stack Pointer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
7.4.4 Program Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93
7.4.5 Condition Code Register . . . . . . . . . . . . . . . . . . . . . . . . . . .93
7.5 Arithmetic/Logic Unit (ALU) . . . . . . . . . . . . . . . . . . . . . . . . . . .96
7.6 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
7.6.1 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
7.6.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97
7.7 CPU During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . .97
7.8 Instruction Set Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97
7.9 Opcode Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97
7.2 Introduction
The M68HC08 CPU (central processor unit) is an enhanced and fully
object-code-compatible version of the M68HC05 CPU. The
CPU08
Reference Manual
(Motorola document order number CPU08RM/AD)
contains a description of the CPU instruction set, addressing modes,
and architecture.

Motorola MC68HC908AB32 Specifications

General

Brand	Motorola
Model	MC68HC908AB32
Category	Controller
Language	English