SN8F5708 datasheet(60/204 Pages) SONIX

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SN8F5708 Series

Interrupt

Datasheet Rev. 2.4

When more than one interrupt request occur, the highest priority request must be executed first.

Choose the highest priority request according natural priority and priority level. The steps are as

the following:

Choose the groups which have the highest priority level between all groups.

Choose the group which is the highest nature priority between the groups with the highest

priority level.

Choose the ISR which has the highest nature priority inside the group with the highest

priority.

Group 0

Group 1

Group 2

Group 3

Interrupt Group

Group 4

Group 5

Interrupt Priority

High

Low

All groups within the same priority level

Level 3

Level 2

Level 1

Level 0

Priority Level

Interrupt Priority

High

Low

Higher priority level has higher priority

IP0.0 = IP0.1 = IP0.2 = IP0.3 = IP0.4 = IP0.5

IP1.0 = IP1.1 = IP1.2 = IP1.3 = IP1.4 = IP1.5

As the example, group5 has the highest priority level and group0~group2 have the lowest priority

level. It means the interrupt vector in group5 has the highest interrupt priority, the 2nd interrupt

priority in group4 and the 3rd interrupt priority in group3. Group0~ group2 have the same priority

level thus the nature priority rule will be followed. Therefore, interrupt priority will be group5>

group4> group3> group0> group1> group2.

MOV

IP0, #00101000B

; Set group0 - group5 in different priority level.

MOV

IP1, #00110000B

Group 5

Group 4

Group 3

Group 0

Interrupt Group

Group 1

Group 2

Interrupt Priority

High

Low

Priority Level: GP5>GP4>GP3>GP2=GP1=GP0

Interrupt Priority: GP5>GP4>GP3>GP0>GP1>GP2

Priority Level

SN8F5708 Datasheet(PDF) 60 Page - SONiX Technology Company

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