Owner's manual

12-13
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
BAUD
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.3
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
TIMER 2
OVERFLOW
TIMER 1
OVERFLOW
AVAILABLE TO SERIAL
PORT 0 ONLY
10
10
10
TCLK =
T2CON.4
RCLK =
T2CON.5
D8
TB8 =
SCONx.
3
D8
TRANSMIT TIMING
LDSBUF
SHIFT
RE
C
EIVE TIMIN
G
BIT DETECTOR
SAMPLING
SHIFT
TI
RI
TXD
D0 D1 D2 D3 D4 D5 D6 D7 STOPSTART
RXD
D
0
D1 D2 D3 D4 D5 D6 D7
START
STOP
TB8
RB8
Figure 12-4. Serial Port Mode 3
Ultra-High-Speed Flash
Microcontroller User’s Guide
Maxim Integrated