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INTERRUPT STRUCTURE
INTERRUPT TYPES
The three components of the S3C8 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
Type 2:
One level (IRQn) + one vector (V
Type 3:
One level (IRQn) + multiple vectors (V
In the S3C80A5B microcontroller, all three interrupt types are implemented.
Type 1:
Type 2:
Type 3:
5-2
Levels
IRQn
IRQn
IRQn
NOTES:
1.
The number of Sn and Vn value is expandable.
2.
In the S3C80A5B implementation, interrupt types 1, 2, and 3 is used.
Figure 5-1. S3C8-Series Interrupt Types
) + one source (S
)
1
1
) + multiple sources (S
1
– V
) + multiple sources (S
1
n
Vectors
V1
V1
V1
V2
V3
Vn
– S
)
1
n
– S
, S
1
n
n+1
Sources
S1
S1
S2
S3
Sn
S1
S2
S3
Sn
Sn + 1
Sn + 2
Sn + m
S3C80A5B
– S
)
n+m
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