Rainbow Electronics AT89C5122 - Manual (Page 162)

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