DS80C320-MCG Datasheet, PDF (146/175 Pages) Dallas Semiconductor – High-Speed Microcontroller User Guide

SERIAL PORT MODE 0 Figure 12-1
OSC
SBUF
OUTPUT SHIFT REGISTER
S0
High-Speed Microcontroller User’s Guide
P3.0
RXD
LATCH
PIN
DIVIDE
BY 12
0
SM2=
SMS2C=ONx.5
SCONx.5
DIVIDE
BY 4
1
LDSBUF
RDSBUF
LOAD
SHIFT
SERIAL
READ
BUFFER
SERIAL
BAUD
BUFFER
CLOCK
RECEIVE
BUFFER
DATA ^LOAD
CLOCK
DATA BUS
RD RECEIVE DATA BUFFER WR
T1
FLAG =
SCONx.1
R1
FLAG =
SCONx.0
SI
RECEIVE SHIFT REGISTER
TRANSMIT TIMING
LDSBUF
SHIFT
RXD
(DATA OUT)
TXD
(DATA CLOCK)
TI
SERIAL
TXD
INTERRUPT
PIN
WRITE TO SBUF
D0
D1
D2
D3
D4
D5
D6 D7
RECEIVE TIMING
RDSBUF
SHIFT
RXD
(DATA IN)
TXD
(DATA CLOCK)
RI
WRITE TO SCON (CLEAR RI)
D0
D1
D2
D3
D4
D5
D6
D7
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