Manual

High-Speed Microcontroller User’s Guide
Rev: 062210 148 of 176
Figure 12-3. Serial Port Mode 2
SBUF
DIVIDE
BY 2
D7
LOAD
CLOCK
TRANSMIT SHIFT REGISTER
S0
P3.1
LATCH
TXD
PIN
RECEIVE DATA BUFFER
WR
RD
CLOCK
RECEIVE SHIFT REGISTER
SI
READ
SERIAL
BUFFER
SHIFT
CLOCK
LOAD
SERIAL
BUFFER
LOAD
INTS
SERIAL I/O
CONTROL
SHIFT
T1
FLAG =
SCONx.1
RXD
PIN
SERIAL
INTERRUPT
LDSBUF
RDSBUF
STOP START
10
STOP
START
RB8=
SCONx.2
R1
FLAG =
SCONx.0
DIVIDE
BY
16
BIT
DETECTION
DATA BUS
SBUF
RESET
DIVIDE
BY 16
SMOD_0=
PCON.7
OR
SMOD_1=
WDCON.7
D6 D5 D4 D3 D2 D1 D0
D7 D5 D4 D3 D2 D1 D0 D6
OSC/2=
CRYSTAL/2
1 0
D8
TB8 =
SCONx.3
D8
TRANSMIT TIMING
LDSBUF
SHIFT
RECEIVE TIMING
BIT DETECTOR
SAMPLING
SHIFT
TI
RI
TXD
D0 D1 D2 D3 D4 D5 D6 D7 STOP
START
RXD
D0 D1 D2 D3 D4 D5 D6 D7
START
STOP
TB8
RB8