MC908JL8CDWE Datasheet, PDF (45/212 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 4
Central Processor Unit (CPU)
4.1 Introduction
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.
4.2 Features
• Object code fully upward-compatible 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
MC68HC908JL8/JK8 • MC68HC08JL8/JK8 • MC68HC908KL8 Data Sheet, Rev. 3.1
Freescale Semiconductor
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