|
AT89C52内部寄存器列表 |
|
通用寄存器 |
|
地址 |
名称 |
位地址 |
|
00H - 07H |
寄存器组0 |
R7 |
R6 |
R5 |
R4 |
R3 |
R2 |
R1 |
R0 |
|
08H – 0FH |
寄存器组1 |
R7 |
R6 |
R5 |
R4 |
R3 |
R2 |
R1 |
R0 |
|
10H – 17H |
寄存器组2 |
R7 |
R6 |
R5 |
R4 |
R3 |
R2 |
R1 |
R0 |
|
18H – 1FH |
寄存器组3 |
R7 |
R6 |
R5 |
R4 |
R3 |
R2 |
R1 |
R0 |
|
20H
:
2FH |
通用寄存器
16个字节
可位寻址 |
00H |
01H |
02H |
03H |
04H |
05H |
06H |
07H |
|
: |
: |
: |
: |
: |
: |
: |
: |
|
78H |
79H |
7A |
7B |
7C |
7D |
7EH |
7FH |
|
30H
:
7FH |
通用寄存器
79个字节 |
|
|
|
|
|
|
80H
：
FFH |
通用寄存器
128个字节
用间接寻址 |
|
|
|
|
|
|
特殊功能寄存器 |
|
地址 |
标记 |
名称 |
D7 |
D6 |
D5 |
D4 |
D3 |
D2 |
D1 |
D0 |
|
80H |
P0 |
P0口锁存器 |
87H |
86H |
85H |
84H |
83H |
82H |
81H |
80H |
|
P0.7 |
P0.6 |
P0.5 |
P0.4 |
P0.3 |
P0.2 |
P0.1 |
P0.0 |
|
81H |
SP |
|
00000111B |
|
82H |
DPL |
|
|
|
83H |
DPH |
|
|
|
87H |
PCON |
|
|
|
|
|
|
|
|
|
|
88H |
TCON |
定时/
计数器控制寄存器 |
8FH |
8EH |
8DH |
8CH |
8BH |
8AH |
89FH |
88H |
|
TF1 |
TR1 |
TF0 |
TR0 |
IE1 |
IT1 |
IE0 |
IT0 |
|
89H |
TMOD |
|
|
|
|
|
|
|
|
|
|
8AH |
TL0 |
|
|
|
8BH |
TL1 |
|
|
|
8CH |
TH0 |
|
|
|
8DH |
TH1 |
|
|
|
90H |
P1 |
P1口锁存器 |
97H |
96H |
95H |
94H |
93H |
92H |
91H |
90H |
|
P1.7 |
P1.6 |
P1.5 |
P1.4 |
P1.3 |
P1.2 |
P1.1 |
P1.0 |
|
98H |
SCON |
串行口控制寄存器 |
9FH |
9EH |
9DH |
9CH |
9BH |
9AH |
99FH |
98H |
|
SM0 |
SM1 |
SM2 |
REN |
TB8 |
RB8 |
T1 |
R1 |
|
99H |
SBUF |
|
|
|
|
|
|
|
|
|
|
A0H |
P2 |
P2口锁存器 |
A7H |
A6H |
A5H |
A4H |
A3H |
A2H |
A1H |
A0H |
|
P2.7 |
P2.6 |
P2.5 |
P2.4 |
P2.3 |
P2.2 |
P2.1 |
P2.0 |
|
A8H |
IE |
中断允许寄存器 |
AFH |
- |
- |
ACH |
ABH |
AAH |
A9H |
A8H |
|
EA |
- |
- |
ES |
ET1 |
EX1 |
ET0 |
EX0 |
|
B0H |
P3 |
P3锁存器 |
B7H |
B6H |
B5H |
B4H |
B3H |
B2H |
B1H |
B0H |
|
P3.7 |
P3.6 |
P3.5 |
P3.4 |
P3.3 |
P3.2 |
P3.1 |
P3.0 |
|
B8H |
IP |
中断优先级寄存器 |
- |
- |
- |
- |
BBH |
BAH |
B9H |
B8H |
|
- |
- |
- |
- |
PT1 |
PX1 |
PT0 |
PX0 |
|
C8H |
T2CON |
定时/计数器2控制寄存器 |
CFH |
CEH |
CDH |
CCH |
CBH |
CAH |
C9H |
C8H |
|
TF2 |
EXF2 |
RCLK |
TCLK |
EXEN2 |
TR2 |
C/T2 |
CP/RL2 |
|
C9H |
T2MOD |
|
- |
- |
- |
- |
- |
- |
T2OE |
DCEN |
|
CAH |
RCAP2L |
|
|
|
CBH |
RCAP2H |
|
|
|
CCH |
TL2 |
|
|
|
CDH |
TH2 |
|
|
|
D0H |
PSW |
程序状态寄存器 |
D7H |
D6H |
D5H |
D4H |
D3H |
D2H |
D1H |
D0H |
|
CY |
AC |
F0 |
RS1 |
RS0 |
OV |
D1 |
P/D0 |
|
E0H |
ACC |
累加器 |
E7H |
E6H |
E5H |
E4H |
E3H |
E2H |
E1H |
E0H |
|
ACC.7 |
ACC.6 |
ACC.5 |
ACC.4 |
ACC.3 |
ACC.2 |
ACC.1 |
ACC.0 |
|
F0H |
B |
B寄存器 |
F7H |
F6H |
F5H |
F4H |
F3H |
F2H |
F1H |
F0H |
|
B.7 |
B.6 |
B.5 |
B.4 |
B.3 |
B.2 |
B.1 |
B.0 | |
