S3C84E5/C84E9/P84E9

INTERRUPT STRUCTURE

 

 

MSB

Interrupt Priority Register (IPR)

FFH, Set 1, Bank 0, R/W

.7

.6

.5

.4

.3

.2

.1

.0

 

 

 

 

 

 

 

 

LSB

Group priority:

D7

D4

D1

 

0

0

0

= Undefined

0

0

1

= B > C > A

0

1

0

= A > B >C

01 1 = B > A > C

10 0 = C > A > B

1 0 1 = C > B > A

11 0 = A > C > B

11 1 = Undefined

Group A

0 = IRQ0 > IRQ1

1 = IRQ1 > IRQ0

Group B

0 = IRQ2 > (IRQ3, IRQ4)

1 = (IRQ3, IRQ4) > IRQ2

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

Figure 5-8. Interrupt Priority Register (IPR)

5-13

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Image 123
Samsung S3C84E5 user manual Interrupt Priority Register IPR