mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 81

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

6.1 Contents
6.2 Introduction
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
Data Sheet — MC68HC908SR12•MC68HC08SR12
6.2
6.3
6.4
6.4.1
6.4.2
6.4.3
6.4.4
6.4.5
6.5
6.6
6.6.1
6.6.2
6.7
6.8
6.9
The M68HC08 CPU (central processor unit) is an enhanced and fully
object-code-compatible version of the M68HC05 CPU. The CPU08
Reference Manual (Freescale document order number CPU08RM/AD)
contains a description of the CPU instruction set, addressing modes,
and architecture.
Section 6. Central Processor Unit (CPU)
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
CPU Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Arithmetic/Logic Unit (ALU) . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
CPU During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Instruction Set Summary
Opcode Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Accumulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Index Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Stack Pointer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Program Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Condition Code Register . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
Central Processor Unit (CPU)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Data Sheet
81