SAB80515 Datasheet, PDF (115/270 Pages) Siemens Semiconductor Group – 8-Bit Single-Chip Microcontroller Family

Interrupt System
Figure 8-2
Special Function Register IEN0 (Address 0A8H)
0AFH 0AEH 0ADH 0ACH 0ABH
0A8H EAL WDT ET2 ES ET1
0AAH
EX1
0A9H
ET0
0A8H
EX0
IEN0
This bit is not used for interrupt control.
Bit
Function
EX0
Enables or disables external interrupt 0.
If EX0 = 0, external interrupt 0 is disabled.
ET0
Enables or disables the timer 0 overflow interrupt.
If ET0 = 0, the timer 0 interrupt is disabled.
EX1
Enables or disables external interrupt 1.
If EX1 = 0, external interrupt 1 is disabled.
ET1
Enables or disables the timer 1 overflow interrupt.
If ET1 = 0, the timer 1 interrupt is disabled.
ES
Enables or disables the serial channel interrupt.
If ES = 0, the serial channel interrupt is disabled.
ET2
Enables or disables the timer 2 overflow or external reload interrupt.
If ET2 = 0, the timer 2 interrupt is disabled.
EAL
Enables or disables all interrupts. If EAL = 0, no interrupt will be acknowledged.
If EAL = 1, each interrupt source is individually enabled or disabled by setting or
clearing its enable bit.
Semiconductor Group
115