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INTERVAL Compiler Directive

Abbreviation None.
Arguments An optional interval, in parentheses, for the interrupt vector table.
Default INTERVAL (8)
µVision Options — C51 — Misc controls.
Description 

The INTERVAL directive specifies an interval for interrupt vectors. When this directive is specified, the compiler locates interrupt vectors at the absolute address calculated by:

(interval × n) + offset + 3,

where:

intervalis the argument of the INTERVAL directive (default 8).
nis the interrupt number.
offsetis the argument of the INTVECTOR directive (default 0).

Note

  • An interval specification is required for SIECO-51 derivatives which define interrupt vectors in 3-byte intervals.
See Also INTVECTOR, NOINTVECTOR
Example  
C51 SAMPLE.C INTERVAL(3)

#pragma interval(3)

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