Owner's manual

20
A/T8xC5121
4164G–SCR–07/06
Table 5. IE0 Register
IE0
Interrupt Enable Register (A8h)
Reset Value = 0XX0 0000b
76543210
EA - - ES ET1 EX1 ET0 EX0
Bit
Number
Bit
Mnemonic Description
7EA
Enable All interrupt 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.
6-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
5-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
4ES
Serial port Enable bit
Clear to disable serial port interrupt.
Set to enable serial port interrupt.
3ET1
Timer 1 overflow interrupt Enable bit
Clear to disable Timer 1 overflow interrupt.
Set to enable Timer 1 overflow interrupt.
2EX1
External interrupt 1 Enable bit
Clear to disable external interrupt 1.
Set to enable external interrupt 1.
1ET0
Timer 0 overflow interrupt Enable bit
Clear to disable Timer 0 overflow interrupt.
Set to enable Timer 0 overflow interrupt.
0EX0
External interrupt 0 Enable bit
Clear to disable external interrupt 0.
Set to enable external interrupt 0.