at89c51rd2-smsum ATMEL Corporation, at89c51rd2-smsum Datasheet - Page 77

• Manufacturer Part Number: at89c51rd2-smsum
• Description: 8-bit Flash Microcontroller
• Manufacturer: ATMEL Corporation

4235J–8051–01/08
Table 17-6.
IEN1 - Interrupt Enable Register (B1h)
Reset Value = XXXX X000b
Bit addressable
Number
Bit
7
7
6
5
4
3
2
1
0
-
Mnemonic
IEN1 Register
ESPI
KBD
Bit
6
-
-
-
-
-
-
Description
Reserved
Reserved
Reserved
Reserved
Reserved
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
-
3
-
AT89C51RD2/ED2
ESPI
2
1
-
KBD
0
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