at89c51re2-slsem ATMEL Corporation, at89c51re2-slsem Datasheet - Page 115

• Manufacturer Part Number: at89c51re2-slsem
• Description: At89c51re2 8-bit Flash Microcontroller
• Manufacturer: ATMEL Corporation

98
AT89C51RE2
Table 78. IEN1 Register
IEN1 - Interrupt Enable Register (B1h)
Reset Value = XXXX 00x0b
Bit addressable
Number
Bit
7
7
6
5
4
3
2
1
0
-
Mnemonic Description
EKBD
ES_1
ESPI
Bit
6
-
-
-
-
-
-
Reserved
Reserved
Reserved
Reserved
Serial port 1 Enable bit
Cleared to disable serial port interrupt.
Set to enable serial port interrupt.
SPI interrupt Enable bit
Cleared to disable SPI interrupt.
Set to enable SPI interrupt.
Reserved
Keyboard interrupt Enable bit
Cleared to disable keyboard interrupt.
Set to enable keyboard interrupt.
5
-
4
-
ES_1
3
ESPI
2
1
-
7663B–8051–03/07
EKBD
0