mc68hc908bd48 Freescale Semiconductor, Inc, mc68hc908bd48 Datasheet - Page 67

• Manufacturer Part Number: mc68hc908bd48
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

6.1 Contents
6.2 Introduction
MC68HC908BD48
Freescale Semiconductor
Data Sheet — MC68HC908BD48
—
Rev. 2.1
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
CPU Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Arithmetic/Logic Unit (ALU) . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
CPU During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Instruction Set Summary
Opcode Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Accumulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Index Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Stack Pointer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Program Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Condition Code Register . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
Central Processor Unit (CPU)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Data Sheet
67