mc68hc705j2 Freescale Semiconductor, Inc, mc68hc705j2 Datasheet - Page 20

• Manufacturer Part Number: mc68hc705j2
• Description: 8-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

4.1 CPU Registers
MC68HC705J2
*Bit 11 of the program counter is fixed at 0 in MC68HC05J1 emulation mode.
This section describes the registers, instruction set, and addressing modes of
the M68HC05 central processor unit (CPU).
Figure 4-1 shows the five CPU registers. These are hard-wired registers within
the CPU and are not part of the memory map.
15
15
0
0
0
0
0
0
12 11*
0
0
0
CENTRAL PROCESSOR UNIT
Figure 4-1. Programming Model
0
PCH
CENTRAL PROCESSOR UNIT
0
0
8
SECTION 4
7
7
1
7
7
1
6
1
1
5
5
1
HALF-CARRY FLAG
H
4
PCL
A
X
INTERRUPT MASK
I
SP
NEGATIVE FLAG
N
ZERO FLAG
Z
CARRY/BORROW FLAG
C
0
0
0
0
0
ACCUMULATOR (A)
INDEX REGISTER (X)
STACK POINTER (SP)
PROGRAM COUNTER (PC)
CONDITION CODE REGISTER
(CCR)
MOTOROLA
4-1