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What will be the value of NMI deep standby cancel flag after reset?

Latest Updated:05/28/2013

Question:

After resetting the pins, the value (1) of the NMI deep standby cancel flag (DPSIFR2.DNMIF) is different from the initial value that is shown in the manual.

Answer:

When a pin reset is canceled while the input of the NMI pin is low, the DNMIF flag is set to 1 (a cancel request by the NMI pin is generated).

During a reset, NMI pin input is disabled, so the internal signal is fixed high. After cancellation of a reset, NMI is input-only, so the pin state is conveyed internally.
For this reason, if reset is canceled when NMI input is low, the internal signal changes from high to low, setting the DNMIF flag to 1.
If reset is canceled when NMI input is high, the internal signal does not change, so the DNMIF flag remains 0 (no cancel request by the NMI pin is generated).

Suitable Products
RX62N, RX621
RX62T
RX630
RX63N, RX631
RX210