P87LPC764BD NXP Semiconductors, P87LPC764BD Datasheet - Page 37

• Manufacturer Part Number: P87LPC764BD
• Description: MCU 8-Bit 87LP 80C51 CISC 4KB EPROM 5V 20-Pin SO Tube
• Manufacturer: NXP Semiconductors

Specifications of P87LPC764BD

• Package: 20SO
• Device Core: 80C51
• Family Name: 87LP
• Maximum Speed: 20 MHz
• Ram Size: 128 Byte
• Program Memory Size: 4 KB
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 Bit
• Program Memory Type: EPROM
• Number Of Programmable I/os: 18
• Interface Type: I2C/UART
• Operating Temperature: 0 to 70 °C
• Number Of Timers: 2

Philips Semiconductors
2003 Sep 03
Low power, low price, low pin count (20 pin)
microcontroller with 4 kbyte OTP
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 29. 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
36
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
P87LPC764
P1.0 ALT
OUTPUT
P1.1 ALT
OUTPUT
TxD
RxD
Product data
TRANSMIT
SU01178
RECEIVE