Samsung S3F80JB User Manual

Page 112

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INTERRUPT STRUCTURE

S3F80JB

5-2

INTERRUPT TYPES

The three components of the S3C8/S3F8-series interrupt structure described above — levels, vectors, and
sources — are combined to determine the interrupt structure of an individual device and to make full use of its
available interrupt logic. There are three possible combinations of interrupt structure components, called interrupt
types 1, 2, and 3. The types differ in the number of vectors and interrupt sources assigned to each level (See
Figure 5-1):

Type 1:

One level (IRQn) + one vector (V

1

) + one source (S

1

)

Type 2:

One level (IRQn) + one vector (V

1

) + multiple sources (S

1

– S

n

)

Type 3:

One level (IRQn) + multiple vectors (V

1

– V

n

) + multiple sources (S

1

– S

n

, S

n+1

– S

n+m

)

In the S3F80JBmicrocontroller, all three interrupt types are implemented.

Vectors

Sources

Levels

S

1

V

1

S

2

Type 2:

IRQn

S

3

S

n

V

1

S

1

V

2

S

2

Type 3:

IRQn

V

3

S

3

V

1

S

1

Type 1:

IRQn

V

n

S

n +

1

S

n

S

n +

2

S

n +

m

NOTE:

The number of S

n

and V

n

value is expandable.

Figure 5-1. S3C8/S3F8-Series Interrupt Types

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