89C51IC2-CM ATMEL [ATMEL Corporation], 89C51IC2-CM Datasheet - Page 63

• Manufacturer Part Number: 89C51IC2-CM
• Description: 8-bit Flash Microcontroller with 2-wire Interface
• Manufacturer: ATMEL [ATMEL Corporation]

4301A–8051–01/04
Table 51. IEN1 Register
IEN1 - Interrupt Enable Register (B1h)
Reset Value = XXXX X000b
Bit addressable
Number
Bit
7
7
6
5
4
3
2
1
0
-
Mnemonic Description
ETWI
ESPI
KBD
Bit
6
-
-
-
-
-
-
Reserved
Reserved
Reserved
Reserved
Reserved
SPI interrupt Enable bit
Cleared to disable SPI interrupt.
Set to enable SPI interrupt.
TWI interrupt Enable bit
Cleared to disable TWI interrupt.
Set to enable TWI interrupt.
Keyboard interrupt Enable bit
Cleared to disable keyboard interrupt.
Set to enable keyboard interrupt.
5
-
4
-
3
-
ESPI
2
AT89C51IC2
ETWI
1
KBD
0
63