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S3F80JB INTERRUPT STRUCTURE
5-13
Interrupt Priority Register (IPR)
FEH, Set 1, Bank 0 , R/W
.7 .6 .5 .4 .3 .2 .1 .0MSB LSB
Group A
0 = IRQ0 > IRQ1
1 = IRQ0 < IRQ1
Subgroup B (see note)
0 = IRQ3>IRQ4
1 = IRQ3<IRQ4
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 = IRQ2 < (IRQ3,IRQ4)
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)