mc68hc705c9a Freescale Semiconductor, Inc, mc68hc705c9a Datasheet - Page 33

• Manufacturer Part Number: mc68hc705c9a
• Description: M68hc05 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 3
Central Processor Unit (CPU)
3.1 Introduction
This section contains the basic programmers model and the registers contained in the CPU.
3.2 CPU Registers
The MCU contains five registers as shown in the programming model of
order is shown in
Freescale Semiconductor
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15
0
Figure
0
INCREASING
ADDRESSES
MEMORY
0
3-2.
0
MC68HC05C9A Advance Information Data Sheet, Rev. 4.1
UNSTACK
0
0
R
E
U
R
N
T
Figure 3-2. Interrupt Stacking Order
0
Figure 3-1. Programming Model
7
1
0
7
7
7
PC
1
1
1
1
INDEX REGISTER
ACCUMULATOR
CONDITION CODE REGISTER
H
PCH
PCL
A
X
I
SP
CCR
N
Z
C
0
0
0
0
0
PROGRAM COUNTER
ACCUMULATOR
INDEX REGISTER
STACK POINTER
CONDITION CODE REGISTER
N
R
R
U
T
E
P
T
I
Figure
STACK
DECREASING
ADDRESSES
MEMORY
3-1. The interrupt stacking
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