mc68hc08ln56 Freescale Semiconductor, Inc, mc68hc08ln56 Datasheet - Page 33

• Manufacturer Part Number: mc68hc08ln56
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 3
Central Processing Unit (CPU)
3.1 Introduction
This section describes the central processor unit (CPU08, Version A). The M68HC08 CPU is an
enhanced and fully object-code-compatible version of the M68HC05 CPU. The CPU08 Reference Manual
(Freescale document number CPU08RM/AD) contains a description of the CPU instruction set,
addressing modes, and architecture.
3.2 Features
Features of the CPU include:
3.3 CPU Registers
Figure 3-1
Freescale Semiconductor
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Fully Upward, Object-Code Compatibility with M68HC05 Family
16-Bit Stack Pointer with Stack Manipulation Instructions
16-Bit Index Register with X-Register Manipulation Instructions
8-MHz CPU Internal Bus Frequency
64-Kbyte Program/Data Memory Space
16 Addressing Modes
Memory-to-Memory Data Moves without Using Accumulator
Fast 8-Bit by 8-Bit Multiply and 16-Bit by 8-Bit Divide Instructions
Enhanced Binary-Coded Decimal (BCD) Data Handling
Modular Architecture with Expandable Internal Bus Definition for Extension of Addressing Range
beyond 64 Kbytes
Low-Power Stop and Wait Modes
shows the five CPU registers. CPU registers are not part of the memory map.
MC68HC08LN56 • MC68HC708LN56 General Release Specification, Rev. 2.1
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