P87LPC769 NXP Semiconductors, P87LPC769 Datasheet - Page 44

• Manufacturer Part Number: P87LPC769
• Description: The P87LPC769 is a 20-pin single-chip microcontroller designed forlow pin count applications demanding high-integration, low costsolutions over a wide range of performance requirements
• Manufacturer: NXP Semiconductors

Philips Semiconductors
2002 Mar 12
Low power, low price, low pin count (20 pin)
microcontroller with 4 kB OTP 8-bit A/D, and DAC
WRITE TO SBUF
SEND
SHIFT
RXD (DATA OUT)
TXD (SHIFT CLOCK)
TI
WRITE TO SCON (CLEAR RI)
RI
RECEIVE
SHIFT
TxD (SHIFT CLOCK)
RxD (DATA IN)
S1 ... S6
WRITE
TO
SBUF
REN
S6
RI
S1 ... S6
SERIAL PORT
INTERRUPT
S1 ... S6
D
CL
LOAD
SBUF
S1 ... S6
READ
SBUF
D0
S
Q
TX CLOCK
START
TX CLOCK
START
D0
S1 ... S6
1
D1
1
80C51 INTERNAL BUS
D1
INPUT SHIFT REGISTER
S1 ... S6
Figure 32. Serial Port Mode 0
D2
ZERO DETECTOR
1
TX CONTROL
RX CONTROL
80C51 INTERNAL BUS
1
SBUF
D2
S1 ... S6
TI
RI
D3
1
SBUF
41
D3
1
S1 ... S6
D4
RECEIVE
1
SHIFT
SEND
D4
SHIFT
0
S1 ... S6
D5
D5
S1 ... S6
D6
D6
FUNCTION
S1 ... S6
P1.1 ALT
INPUT
RXD
D7
CLOCK
SHIFT
D7
S1 ... S6
S1 ... S6
FUNCTION
FUNCTION
P87LPC769
P1.0 ALT
OUTPUT
P1.1 ALT
OUTPUT
TxD
RxD
Preliminary data
TRANSMIT
SU01178
RECEIVE