CONTROL REGISTERSS3F80JB

IPR — Interrupt Priority Register

FFH Set1 Bank0

Bit Identifier

Reset Value

Read/Write

Addressing Mode

.7

.6

.5

.4

.3

.2

.1

.0

x

x

x

x

x

x

x

x

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

Register addressing mode only

.7, .4, and .1

Priority Control Bits for Interrupt Groups A, B, and C

 

0

0

0

Group priority undefined

 

0

0

1

B > C > A

 

0

1

0

A > B > C

 

0

1

1

B > A > C

 

1

0

0

C > A > B

 

1

0

1

C > B > A

 

1

1

0

A > C > B

 

1

1

1

Group priority undefined

.6

Interrupt Subgroup C Priority Control Bit

0IRQ6 > IRQ7

1IRQ7 > IRQ6

.5

Interrupt Group C Priority Control Bit

 

0

IRQ5 > (IRQ6, IRQ7)

 

1

(IRQ6, IRQ7) > IRQ5

.3

Interrupt Subgroup B Priority Control Bit (See Note)

 

0

IRQ3>IRQ4

 

1

IRQ4>IRQ3

.2

Interrupt Group B Priority Control Bit (See Note)

 

0

IRQ2 >(IRQ3, IRQ4)

 

1

(IRQ3, IRQ4) > IRQ2

.0

Interrupt Group A Priority Control Bit

 

0

IRQ0 > IRQ1

 

1

IRQ1 > IRQ0

NOTE: The S3F80JB interrupt structure uses eight levels: IRQ0-IRQ7.

4-16

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Samsung S3F80JB manual IPR Interrupt Priority Register FFH Set1 Bank0