參數資料
型號: MC68HC05C8MB
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, PDIP42
封裝: PLASTIC, SHRINK, DIP-42
文件頁數: 87/156頁
文件大?。?/td> 1755K
代理商: MC68HC05C8MB
Central Processor Unit (CPU)
Advance Information
MC68HC05C8A — Rev. 4.0
36
Central Processor Unit (CPU)
MOTOROLA
Figure 3-1. Programming Model
Figure 3-2. Stacking Order
3.3.1 Accumulator
The accumulator (A) shown in Figure 3-1 is a general-purpose 8-bit
register used to hold operands and results of arithmetic calculations or
data manipulations.
3.3.2 Index Register
The index register (X) is an 8-bit register used by the indexed addressing
value to create an effective address. The index register also may be
used as a temporary storage area.
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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