DS80C320-MCG Datasheet, PDF (152/175 Pages) Dallas Semiconductor – High-Speed Microcontroller User Guide

High-Speed Microcontroller User’s Guide
SERIAL PORT MODE 3 Figure 12-4
TIMER 1
OVERFLOW
TIMER 2
OVERFLOW
SBUF
TRANSMIT SHIFT REGISTER
S0
P3.1
LATCH
TXD
PIN
DIVIDE
BY 2
0 ^SMOD_0=
PCON.7
1
OR
SMOD_1=
WDCON.7
01
TCLK =
T2CON.4
RCLK =
T2CON.5 _{0 1}
1
TB8=
SCONx.3
LDSBUF
RDSBUF
DIVIDE
BY 16
LOAD
SERIAL
BUFFER
BAUD
CLOCK
RESET
SHIFT
READ
SERIAL
BUFFER
LOAD
0
DATA BUS
SBUF
RD RECEIVE DATA BUFFER WR
RB8=
SCONx.3
T1
FLAG =
SCONx.1
R1
FLAG =
SCONx.0
SERIAL
INTERRUPT
DIVIDE
BY
16
SI
RECEIVE SHIFT REGISTER
BIT
DETECTION
RXD
PIN
TRANSMIT TIMING
LDSBUF
SHIFT
TXD
START D0
D1
D2
D3
D4
D5
D6 D7
TB8 STOP
TI
RECEIVE TIMING
RXD
BIT DETECTOR
SAMPLING
SHIFT
START D0
D1
D2
D3
D4
D5
D6
D7
RB8 _STOP
RI
152 of 175