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What kind of function is the NMI noise canceller of INTC?

Latest Updated:03/25/2009

Question:

What kind of function is the NMI noise canceller function of the Interrupt Controller (INTC)?

Answer:

The NMI noise canceller function determines noise input to the NMI pin by software by monitoring the input signal level at the NMI pin, when NMI interrupts are generated.
The signal level input to the NMI pin can be determined by reading the NMIL bit of the Interrupt Control Register (ICR or ICR1).
Example of use) In the NMI interrupt exception service routine, whether the expected input was made to the NMI pin is dertermined by reading the NMIL bit by software, and the required end processing is performed.
Suitable Products
SH7144 Series
SH7060 Series
SH7065
SH7050 Series
SH7058
SH7055
SH7047 Series
SH7046 Series
SH7040 Series
SH7030 Series
SH7020 Series
SH7010 Series
SH7018
SH7011