at83c5122 ATMEL Corporation, at83c5122 Datasheet - Page 162

• Manufacturer Part Number: at83c5122
• Description: At83c5123 C51 Microcontroller With Usb And Smart Card Reader Interfaces
• Manufacturer: ATMEL Corporation

Registers
162
AT8xC5122/23
Table 98. Interrupt Enable Register 0 - IEN0 (A8h)
Reset Value = 0000 0000b (Bit addressable)
Number
6 - 5
Bit
EA
7
7
4
3
2
1
0
Mnemonic Description
ET1
EX1
ET0
EX0
Bit
EA
ES
6
-
-
Enable All interrupt bit
Cleared to disable all interrupts.
Set to enable all interrupts.
Reserved
The value read from this bit is indeterminate. Do not change these bits.
Serial port Enable bit
Cleared to disable serial port interrupt.
Set to enable serial port interrupt.
Timer 1 overflow interrupt Enable bit
Cleared to disable timer 1 overflow interrupt.
Set to enable timer 1 overflow interrupt.
External interrupt 1 Enable bit
Cleared to disable external interrupt 1.
Set to enable external interrupt 1.
Timer 0 overflow interrupt Enable bit
Cleared to disable timer 0 overflow interrupt.
Set to enable timer 0 overflow interrupt.
External interrupt 0 Enable bit
Cleared to disable external interrupt 0.
Set to enable external interrupt 0.
5
-
ES
4
ET1
3
EX1
2
ET0
1
4202E–SCR–06/06
EX0
0