参数资料
型号: MC68HCL05C12AFN
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC44
封装: PLASTIC, LCC-44
文件页数: 83/156页
文件大小: 3848K
代理商: MC68HCL05C12AFN
NON-DISCLOSURE
AGREEMENT
REQUIRED
Central Processor Unit (CPU)
General Release Specification
MC68HC05C12A Rev. 3.0
Central Processor Unit (CPU)
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
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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c
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.
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