P87LPC764BD NXP Semiconductors, P87LPC764BD Datasheet - Page 22

• 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
KBI
BIT
KBI.7
KBI.6
KBI.5
KBI.4
KBI.3
KBI.2
KBI.1
KBI.0
Note: the Keyboard Interrupt must be enabled in order for the settings of the KBI register to be effective. The interrupt flag
(KBF) is located at bit 7 of AUXR1.
Address: 86h
Not Bit Addressable
SYMBOL
KBI.7
KBI.6
KBI.5
KBI.4
KBI.3
KBI.2
KBI.1
KBI.0
P0.7
P0.6
P0.5
P0.4
P0.3
P0.2
P0.1
P0.0
KBI.7
KBI.6
KBI.5
KBI.4
KBI.3
KBI.2
KBI.1
KBI.0
KBI.7
7
FUNCTION
When set, enables P0.7 as a cause of a Keyboard Interrupt.
When set, enables P0.6 as a cause of a Keyboard Interrupt.
When set, enables P0.5 as a cause of a Keyboard Interrupt.
When set, enables P0.4 as a cause of a Keyboard Interrupt.
When set, enables P0.3 as a cause of a Keyboard Interrupt.
When set, enables P0.2 as a cause of a Keyboard Interrupt.
When set, enables P0.1 as a cause of a Keyboard Interrupt.
When set, enables P0.0 as a cause of a Keyboard Interrupt.
KBI.6
6
Figure 15. Keyboard Interrupt Register (KBI)
KBI.5
5
Figure 14. Keyboard Interrupt
KBI.4
4
21
KBI.3
(FROM IEN1 REGISTER)
3
EKB
KBI.2
2
KBI.1
1
KBI.0
0
KBF (KBI INTERRUPT)
Reset Value: 00h
SU01163
P87LPC764
SU01164
Product data