参数资料
型号: MC68HC05RC8DW
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封装: SOIC-28
文件页数: 51/122页
文件大小: 445K
代理商: MC68HC05RC8DW
Central Processor Unit
General Release Specification
MC68HC05RC16 — Rev. 3.0
34
Central Processor Unit
MOTOROLA
Figure 3-2. Stacking Order
3.3 Accumulator
The accumulator (A) is a general-purpose 8-bit register used to hold
operands and results of arithmetic calculations or data manipulations.
3.4 Index Register
The index register (X) is an 8-bit register used for the indexed
addressing value to create an effective address. The index register also
may be used as a temporary storage area.
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
70
A
70
X
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