参数资料
型号: MC68HC05C5CP
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, PDIP40
封装: DIP-40
文件页数: 14/58页
文件大小: 166K
代理商: MC68HC05C5CP
Page 15
Section 4: CPU Core
MOTOROLA
MC68HC05C5 Specification Rev. 1.2
SECTION 4
CPU CORE
4.1
REGISTERS
The MCU contains five registers as shown in the programming model of Figure 4-1. The
interrupt stacking order is shown in Figure 4-2.
4.1.1
ACCUMULATOR (A)
The accumulator is a general purpose 8-bit register used to hold operands and results of
arithmetic calculations or data manipulations.
A
70
X
70
HI
N
Z
C
CCR
11
SP
70
PC
12
0
Accumulator
Index Register
Program Counter
Stack Pointer
Condition Code Register
Figure 4-1: Programming Model
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
Figure 4-2: Stacking Order
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