1JNB TIOUT
CLR TI TI
MOV A#0FEH LED
ACALL DELAY
RL A LED
(Transmit/Receive)
2. MSC-51

JNB TI$
MOV A#0FEH LED
ACALL DELAY
RL A LED
MOV A, SBUF
RI=0 REN=1RXD108SBUFRI=1



D0
D1
D2
D3
D4
D5
D6
D7
D8


2

13
T12T1


SMOD0X249.49≈2500FAHSMOD1X242.98≈2430F3H

MOV SCON, #50H 1
MOV TMOD, #20H 12
MOV TH1, #0E6H 1200
MOV SBUF, A
AJMP WAIT
MOV SCON, #50H 1
MOV TMOD, #20H 12
MOV TH1, #0E6H 1200
JMP JSHOU
MOV P1,A P2
CLR RI RI

MOV PCON#80H
MOV R0#30H 30HR0
MOV R7#10H 16
MOV CP
MOV TB8C TB8
MOV SBUFA
AJMP HERE TI1
CONT INC R0
SJMP $
END