T89C51CC02 Atmel, T89C51CC02 Datasheet - Page 123

• Manufacturer Part Number: T89C51CC02
• Description: 8-Bit MCU
• Manufacturer: Atmel

18.2. Registers
IEN0 (S:A8h)
Interrupt Enable Register
Reset Value: 0000 0000b
bit addressable
Rev.A - May 17, 2001
Bit Number Bit Mnemonic
EA
7
7
6
5
4
3
2
1
0
EX1
EX0
ET2
ET1
ET0
EC
EA
EC
ES
6
Enable All interrupt bit
PCA Interrupt Enable
Timer 2 overflow interrupt Enable bit
Serial port Enable bit
Timer 1 overflow interrupt Enable bit
External interrupt 1 Enable bit
Timer 0 overflow interrupt Enable bit
External interrupt 0 Enable bit
Clear to disable all interrupts.
Set to enable all interrupts.
If EA=1, each interrupt source is individually enabled or disabled by setting or clearing its interrupt
enable bit.
Clear to disable the PCA interrupt.
Set to enable the PCA interrupt.
Clear to disable timer 2 overflow interrupt.
Set to enable timer 2 overflow interrupt.
Clear to disable serial port interrupt.
Set to enable serial port interrupt.
Clear to disable timer 1 overflow interrupt.
Set to enable timer 1 overflow interrupt.
Clear to disable external interrupt 1.
Set to enable external interrupt 1.
Clear to disable timer 0 overflow interrupt.
Set to enable timer 0 overflow interrupt.
Clear to disable external interrupt 0.
Set to enable external interrupt 0.
ET2
5
Figure 127. IE0 Register
Preliminary
ES
4
ET1
3
Description
EX1
2
T89C51CC02
ET0
1
EX0
0
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