Samsung S3C8275X - Manual (Page 129)

INTERRUPT STRUCTURE S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X
5-12
Interrupt Priority Register (IPR)
FFH, Set 1, Bank 0, R/W
.7 .6 .5 .4 .3 .2 .1 .0 MSB LSB
Group A:
0 = IRQ0 > IRQ1
1 = IRQ1 > IRQ0
Subgroup B:
0 = IRQ3 > IRQ4
1 = IRQ4 > IRQ3
Group C:
0 = IRQ5 > (IRQ6, IRQ7)
1 = (IRQ6, IRQ7) > IRQ5
Subgroup C:
0 = IRQ6 > IRQ7
1 = IRQ7 > IRQ6
Group B:
0 = IRQ2 > (IRQ3, IRQ4)
1 = (IRQ3, IRQ4) > IRQ2
Group priority:
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1 = Undefined
= B > C > A
= A > B > C
= B > A > C
= C > A > B
= C > B > A
= A > C > B
= Undefined
D7 D4 D1
Figure 5-8. Interrupt Priority Register (IPR)