Central Processor Unit (CPU)
Technical Data MC68HC908AB32 — Rev. 1.0
90 Central Processor Unit (CPU) MOTOROLA
7.3 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
• 64K-byte 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 64K-bytes
• Low-power stop and wait modes
7.4 CPU Registers
Figure 7-1 shows the five CPU registers. CPU registers are not part of
the memory map.
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