參數(shù)資料
型號: MC68HC05P18MDWR3
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封裝: SOIC-28
文件頁數(shù): 75/144頁
文件大小: 1348K
代理商: MC68HC05P18MDWR3
Advance Information
MC68HC(8)05P18 — Rev. 2.0
36
Central Processing Unit (CPU)
MOTOROLA
Central Processing Unit (CPU)
3.3 CPU Registers
The five CPU registers are shown in Figure 3-1 and the interrupt
stacking order is shown in Figure 3-2.
Figure 3-1. Programming Model
Figure 3-2. Stacking Order
A
70
X
70
HI
N
Z
C
CCR
11
SP
7
0
PC
12
0
ACCUMULATOR
INDEX REGISTER
PROGRAM COUNTER
STACK POINTER
CONDITION CODE REGISTER
0
12
INDEX REGISTER
PCL
ACCUMULATOR
CONDITION CODE REGISTER
PCH
11
1
70
STACK
I
N
T
E
R
U
P
T
DECREASING
UNSTACK
R
E
T
U
R
N
INCREASING
Note: Since the stack pointer decrements during pushes, the PCL is stacked first,
followed by PCH, etc. Pulling from the stack is in the reverse order.
MEMORY
ADDRESSES
MEMORY
ADDRESSES
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