51单片机寄存器/指令/标志位/英语 缩写
转自：http://hi.baidu.com/%B0%EB%CA%C0%CC%F4%D5%BD/blog/item/1984633dd855d53071cf6c64.html
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Symbol
Description
Byte Address
P0
Port 0
80h
SP
Stack pointer
81h
DPL
Data pointer (low byte)
82h
DPH
Data pointer (high byte)
83h
TCON
Counter/Timer control
88h
TMOD
Counter/Timer operation mode
89h
TL0
Counter/Timer 0 (low byte)
8Ah
TL1
Counter/Timer 1 (low byte)
8Bh
TH0
Counter/Timer 0 (high byte)
8Ch
TH1
Counter/Timer 1 (high byte)
8Dh
P1
Port 1
90h
SCON
Serial port control
98h
SBUF
Serial port buffer
99h
P2
Port 2
0A0h
IE
Interrupt Enable
0A8h
P3
Port 3
0B0h
PSW
Program Status Word
0D0h
ACC
Accumulator
0E0h
B
Multiplication Register
0F0h
BIT SymbolsSymbol
Description
Bit Position
Bit Address
CY
Carry Flag
PSW.7
0D7h
AC
Auxiliary Carry Flag
PSW.6
0D6h
F0
Flag 0
PSW.5
0D5h
RS1
Register Bank Select, Bit 1
PSW.4
0D4h
RS0
Register Bank Select, Bit 0
PSW.3
0D3h
OV
Overflow Bit
PSW.2
0D2h
P
Parity Bit
PSW.0
0D0h
TF1
Timer-1 Overflow Bit
TCON.7
8Fh
TR1
Timer-1 RUN Control Bit
TCON.6
8Eh
TF0
Timer-0 Overflow Bit
TCON.5
8Dh
TR0
Timer-0 RUN Control Bit
TCON.4
8Ch
IE1
Interrupt 1 Edge Flag
TCON.3
8Bh
IT1
Interrupt 1 Control Bit
TCON.2
8Ah
IE0
Interrupt 0 Edge Flag
TCON.1
89h
IT0
Interrupt 0 Control Bit
TCON.0
88h
SM0
Serial Mode Control Bit 0
SCON.7
9Fh
SM1
Serial Mode Control Bit 1
SCON.6
9Eh
SM2
Serial Mode Control Bit 2
SCON.5
9Dh
REN
Receiver Enable Bit
SCON.4
9Ch
TB8
Transmit Bit 8 (9-Bit Mode)
SCON.3
9Bh
RB8
Receive Bit 8 (9-Bit Mode)
SCON.2
9Ah
TI
Transmitter Interrupt Flag
SCON.1
99h
RI
Receiver Interrupt Flag
SCON.0
98h
EA
Enable all Interrupts
IE.7
0AFh
ES
Enable serial Port Interrupt
IE.4
0ACh
ET1
Enable Timer 1 Interrupt
IE.3
0ABh
EX1
Enable External Interrupt 1
IE.2
0AAh
ET0
Enable Timer 0 Interrupt
IE.1
0A9h
EX0
Enable External Interrupt 0
IE.0
0A8h
RD
Read Data for External Memory
P3.7
0B7h
WR
Write Data for External Memory
P3.6
0B6h
T1
Timer/Counter 1 Input/Output
P3.5
0B5h
T0
Timer/Counter 0 Input/Output
P3.4
0B4h
INT1
Interrupt 1 Input Pin
P3.3
0B3h
INT0
Interrupt 0 Input Pin
P3.2
0B2h
TXD
Serial Port Transmit Pin
P3.1
0B1h
RXD
Serial Port Receive Pin
P3.0
0B0h
PS
Serial Port Interrupt Priority
IP.4
0BCh
PT1
Timer 1 Interrupt Priority
IP.3
0BBh
PX1
External Interrupt 1 Priority
IP.2
0BAh
PT0
Timer 0 Interrupt Priority
IP.1
0B9h
PX0
External Interrupt 0 Priority
IP.0
0B8h
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