AT8xC51SND2C
Table 54. IEN1 Register
IEN1 (S:B1h) – Interrupt Enable Register 1
7
-
6
5
-
4
3
-
2
1
0
EUSB
EKB
ESPI
EI2C
EMMC
Bit
Bit
Number
Mnemonic Description
Reserved
7
6
5
4
3
2
-
The value read from this bit is always 0. Do not set this bit.
USB Interface Interrupt Enable Bit
Set this bit to enable USB interrupts.
Clear this bit to disable USB interrupts.
EUSB
Reserved
-
The value read from this bit is always 0. Do not set this bit.
Keyboard Interface Interrupt Enable Bit
Set to enable Keyboard interrupt.
Clear to disable Keyboard interrupt.
EKB
-
Reserved
The value read from this bit is always 0. Do not set this bit.
SPI Controller Interrupt Enable Bit
Set to enable SPI interrupt.
ESPI
Clear to disable SPI interrupt.
Two Wire Controller Interrupt Enable Bit
Set to enable Two Wire interrupt.
Clear to disable Two Wire interrupt.
1
0
EI2C
MMC Interface Interrupt Enable Bit
Set to enable MMC interrupt.
EMMC
Clear to disable MMC interrupt.
Reset Value = 0000 0000b
41
4341D–MP3–04/05
ATMEL [ ATMEL ]
