Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller PLCC 44 (16.59x16.59) 8-Bit 60 MHz I/O number 32

60

AT89C51RB2/RC2

4180E–8051–10/06

Table 47. IEN1 Register

IEN1 - Interrupt Enable Register (B1h)

Reset Value = XXXX X000b

Bit addressable

76543210

-----ESPI-KBD

Bit

Number

Bit

Mnemonic Description

7-Reserved

6-Reserved

5-Reserved

4-Reserved

3-Reserved

2ESPI

SPI Interrupt Enable Bit

Cleared to disable SPI interrupt.

Set to enable SPI interrupt.

1-Reserved

0 KBD

Keyboard Interrupt Enable Bit

Cleared to disable keyboard interrupt.

Set to enable keyboard interrupt.