Samsung S3F80JB User Manual

Page 123

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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

.0

MSB

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)

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