MC68HC705C4ACB MOTOROLA [Motorola, Inc], MC68HC705C4ACB Datasheet - Page 44

• Manufacturer Part Number: MC68HC705C4ACB
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Central Processor Unit (CPU)
3.3 CPU Registers
Technical Data
44
Figure 3-1
These are hard-wired registers within the CPU and are not part of the
memory map.
Bit 12 11
Bit 12 11
•
•
•
•
•
0
Accumulator (A)
Index register (X)
Stack pointer (SP)
Program counter (PC)
Condition code register (CCR)
0
10
10
0
Central Processor Unit (CPU)
shows the five CPU registers:
CARRY/BORROW FLAG
9
0
9
HALF-CARRY FLAG
INTERRUPT MASK
NEGATIVE FLAG
8
0
8
Figure 3-1. Programming Model
ZERO FLAG
Bit 7
Bit 7
Bit 7
7
1
7
1
6
6
6
1
6
6
1
5
5
5
5
5
1
MC68HC705C4A • MC68HSC705C4A — Rev. 3.0
H
4
4
4
4
4
3
3
3
3
3
I
N
2
2
2
2
2
1
1
1
1
1
Z
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
C
INDEX REGISTER (X)
STACK POINTER (SP)
PROGRAM COUNTER (PC)
CONDITION CODE REGISTER (CCR)
ACCUMULATOR (A)
MOTOROLA