P87LPC764BD NXP Semiconductors, P87LPC764BD Datasheet - Page 27

• 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
Table 8. Sources of Wakeup from Power Down Mode
2003 Sep 03
Wakeup Source
External Interrupt 0 or 1
Keyboard Interrupt
Comparator 1 or 2
Watchdog Timer Reset
Watchdog Timer Interrupt
Brownout Detect Reset
Brownout Detect Interrupt
Reset Input
Low power, low price, low pin count (20 pin)
microcontroller with 4 kbyte OTP
Conditions
The corresponding interrupt must be enabled.
The keyboard interrupt feature must be enabled and properly set up. The corresponding interrupt must be
enabled.
The comparator(s) must be enabled and properly set up. The corresponding interrupt must be enabled.
The watchdog timer must be enabled via the WDTE bit in the UCFG1 EPROM configuration byte.
The WDTE bit in the UCFG1 EPROM configuration byte must not be set. The corresponding interrupt must
be enabled.
The BOD bit in AUXR1 must not be set (brownout detect not disabled). The BOI bit in AUXR1 must not be
set (brownout interrupt disabled).
The BOD bit in AUXR1 must not be set (brownout detect not disabled). The BOI bit in AUXR1 must be set
(brownout interrupt enabled). The corresponding interrupt must be enabled.
The external reset input must be enabled.
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P87LPC764
Product data