P87LPC764BD NXP Semiconductors, P87LPC764BD Datasheet - Page 41

• 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
TX CLOCK
WRITE TO SBUF
SEND
DATA
SHIFT
TxD
TI
STOP BIT GEN.
RX CLOCK
RxD
BIT DETECTOR SAMPLE TIMES
SHIFT
RI
Low power, low price, low pin count (20 pin)
microcontroller with 4 kbyte OTP
WRITE TO SBUF
SMOD1 = 0
OVERFLOW
TIMER 1
FUNCTION
P1.1 ALT
2
16 RESET
INPUT
RxD
SMOD1
= 1
TRANSITION
DETECTOR
START
1-TO-0
START
BIT
BIT
16
D
D0
CL
D0
TB8
S
DETECTOR
LOAD
SBUF
Q
READ
SBUF
TX CLOCK
START
START
BIT
D1
D1
16
Figure 32. Serial Port Mode 3
CLOCK
D2
RX
D2
ZERO DETECTOR
TX CONTROL
RX CONTROL
INPUT SHIFT REGISTER
80C51 INTERNAL BUS
80C51 INTERNAL BUS
D3
TI
D3
RI
40
SBUF
SBUF
D4
1FFH
D4
LOAD SBUF
DATA
SEND
SHIFT
SHIFT
D5
D5
D6
D6
SERIAL PORT INTERRUPT
D7
D7
TB8
RB8
STOP BIT
STOP BIT
P87LPC764
TxD
P1.0 ALT
OUTPUT
FUNCTION
Product data
TRANSMIT
RECEIVE
SU01181