AT89C51RB2/RC2
Table 44. IENO Register
IEN0 - Interrupt Enable Register (A8h)
7
6
5
4
3
2
1
0
EA
EC
ET2
ES
ET1
EX1
ET0
EX0
Bit
Bit
Number
Mnemonic Description
Enable All Interrupt Bit
7
6
EA
EC
Cleared to disable all interrupts.
Set to enable all interrupts.
PCA Interrupt Enable Bit
Cleared to disable.
Set to enable.
Timer 2 Overflow Interrupt Enable Bit
Cleared to disable timer 2 overflow interrupt.
Set to enable timer 2 overflow interrupt.
5
4
3
2
1
0
ET2
ES
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.
ET1
EX1
ET0
EX0
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.
Reset Value = 0000 0000b
Bit addressable
57
4180E–8051–10/06
ATMEL [ ATMEL ]
