Intel MCS 51 - Page 126

HARDWARE DESCRIPTIONOF THE 8051,8052 AND 80C51
WRITE
TO
SBUF
26
SoslMTERNALws
RXD
PS.OALT
OUTPUT
FUNCTION
SHIFT
Tx CONTROL
SERIAL
PORT
INTERRUPT
l-m
P3.1 ALT
OUTPUT
FUNCTION
REN
R
RX(I
P!?OALT
. . ...
INPUT
~T”
FUNCTION
u
I
SeuF
1
REAO
SBUF
nwRrTEToseuF
SEND -
SNIFT
II
n n n n
n n n
MD {DATAOUTI \
W
1
01
x
lx?
,
w 1 M x m I 06 1 07 \
Tli6i6\
n
I
nWRITE T08CON(CUAR Ill)
am I
RECEIVE
I
SNm
n
n
n
I-I
n n
n
n
RXD(DATAIN)
M
“m
.Ds
.0s
“m .0s
.06
D?
L
mmwmaocm
TRANSMIT
RECEIVE
270252-15
Figure 17. 8erial Port Mode O
3-18