Motorola DragonBall MC68328 User Manual page 40

TIMER1
This bit indicates that a timer-1 event occurred. Please refer to the timer section for oper-
ation details. This is a Level 6 interrupt.
0 = No timer-1 events
1 = Timer-1 events
TIMER2
This bit indicates that timer-2 timed out. Refer to the timer section for operation details.
This is a Level 4 interrupt.
0 = No timer-2 events
1 = Timer-2 events
IRQ3
This bit, while set, indicates that an external device requests an interrupt on Level 3. If
IRQ3 is set to be a level-sensitive interrupt, users must clear the source of the interrupt.
If IRQ3 is set to be an edge-sensitive interrupt, users must clear the interrupt by writing a
1 to this status bit. Writing a 0 to this bit has no effect.
0 = No Level 3 interrupt pending
1 = Level 3 interrupt pending
IRQ2
This bit, while set, indicates that an external device requests an interrupt on Level 2. If
IRQ2 is set to be a level-sensitive interrupt, users must clear the source of the interrupt.
If IRQ2 is set to be an edge-sensitive interrupt, users must clear the interrupt by writing a
1 to this status bit. Writing a 0 to this bit and the remainder of the bits in this register has
no effect.
0 = No Level 2 interrupt pending
1 = Level 2 interrupt pending
IRQ1
This bit, while set, indicates that an external device requests an interrupt on Level 1. If
IRQ1 is set to be a level-sensitive interrupt, users must clear the source of the interrupt.
If IRQ1 is set to be an edge-sensitive interrupt, users must clear the interrupt by writing a
1 to this status bit. Writing a 0 to this bit and the remainder of the bits in this register has
no effect.
0 = No Level 1 interrupt pending
1 = Level 1 interrupt pending
IRQ7
This bit, while set, indicates that an external device requests an interrupt on Level 7. The
IRQ7 is an active low-edge sensitive interrupt, so users must clear the interrupt by writing
a 1 to this status bit. Writing a 0 to this bit and the remainder of the bits in this register has
no effect.
0 = No Level 7 interrupt pending
1 = Level 7 interrupt pending
MOTOROLA MC68328 DRAGONBALL PROCESSOR USER'S MANUAL
System Integration Module
2-15