參數(shù)資料
型號(hào): MC68HSC05J1A
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: Microcontrollers
中文描述: 微控制器
文件頁數(shù): 37/128頁
文件大?。?/td> 1620K
代理商: MC68HSC05J1A
Central Processor Unit (CPU)
CPU Registers
MC68HC05J1A — Rev. 3.0
Technical Data
MOTOROLA
Central Processor Unit (CPU)
For More Information On This Product,
Go to: www.freescale.com
37
3.3.4 Program Counter
The program counter (PC) shown in
Figure 3-5
is a 16-bit register that
contains the address of the next instruction or operand to be fetched.
The five most significant bits of the program counter are ignored
internally and appear as 00000.
Normally, the address in the program counter automatically increments
to the next sequential memory location every time an instruction or
operand is fetched. Jump, branch, and interrupt operations load the
program counter with an address other than that of the next sequential
location.
Figure 3-5. Program Counter (PC)
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Bit
0
Read:
0
0
0
0
0
Write:
Reset:
0
0
0
0
0
Loaded with vector from$07FE and $07FF
F
Freescale Semiconductor, Inc.
n
.
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