DS80C320-MCG Datasheet, PDF (150/175 Pages) Dallas Semiconductor – High-Speed Microcontroller User Guide

SERIAL PORT MODE 2 Figure 12-3
High-Speed Microcontroller User’s Guide
OSC/2=
CRYSTAL/2
DIVIDE
BY 2
0 ^SMOD_0=
PCON.7
1
OR
SMOD_1=
WDCON.7
DIVIDE
BY 16
SBUF
TRANSMIT SHIFT REGISTER
S0
P3.1
LATCH
TXD
PIN
1
0
TB8 =
SCONx.3
LDSBUF
RDSBUF
LOAD
SERIAL
BUFFER
SHIFT
CLOCK
RESET
SHIFT
READ
SERIAL
BUFFER
LOAD
DATA BUS
SBUF
RD RECEIVE DATA BUFFER WR
RB8=
SCONx.2
TRANSMIT TIMING
LDSBUF
SHIFT
TXD
TI
RECEIVE TIMING
RXD
BIT DETECTOR
SAMPLING
SHIFT
RI
T1
FLAG =
SCONx.1
R1
FLAG =
SCONx.0
SERIAL
INTERRUPT
DIVIDE
BY
16
SI
RECEIVE SHIFT REGISTER
BIT
DETECTION
RXD
PIN
START D0
D1
D2
D3
D4
D5
D6 D7
TB8 STOP
START D0
D1
D2
D3
D4
D5
D6
D7
RB8 _STOP
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