MC68HC705C8A Datasheet, PDF (42/222 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Central Processor Unit (CPU)
3.3 CPU Registers
Figure 3-1 shows the five CPU registers. These are hard-wired registers
within the CPU and are not part of the memory map.
Bit 7 6 5 4 3 2 1 Bit 0
ACCUMULATOR (A)
Bit 7 6 5 4 3 2 1 Bit 0
INDEX REGISTER (X)
Bit 12 11 10 9 8 7 6 5 4 3 2 1 Bit 0
0000011
STACK POINTER (SP)
Bit 12 11 10 9 8 7 6 5 4 3 2 1 Bit 0
PROGRAM COUNTER (PC)
Bit 7 6 5 4 3 2 1 Bit 0
1 1 1 H I N Z C CONDITION CODE REGISTER (CCR)
HALF-CARRY FLAG
INTERRUPT MASK
NEGATIVE FLAG
ZERO FLAG
CARRY/BORROW FLAG
Figure 3-1. Programming Model
Technical Data
42
Central Processor Unit (CPU)
MC68HC705C8A — Rev. 2.0
MOTOROLA