MC68HC08AZ60A Datasheet, PDF (99/480 Pages) Motorola, Inc – Microcontrollers

Advance Information — MC68HC08AZ60A
Section 7. Central Processor Unit (CPU)
7.1 Contents
7.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
7.3 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
7.4 CPU registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
7.4.1 Accumulator (A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
7.4.2 Index Register (H:X) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101
7.4.3 Stack Pointer (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
7.4.4 Program Counter (PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
7.4.5 Condition Code Register (CCR) . . . . . . . . . . . . . . . . . . .103
7.5 Arithmetic/Logic Unit (ALU). . . . . . . . . . . . . . . . . . . . . . . . . 105
7.6 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
7.7 CPU During Break Interrupts. . . . . . . . . . . . . . . . . . . . . . . . 106
7.8 Instruction Set Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
7.9 Opcode Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
7.2 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.
MC68HC08AZ60A — Rev 0.0
MOTOROLA
Central Processor Unit (CPU)
Advance Information
99