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Is interrupt retained when IRQ interrupt is set to the level detection?

Latest Updated:03/25/2009

Question:

Is interrupt retained when the IRQ interrupt is set to the level detection?

Answer:

The interrupt is not retained when the IRQ interrupt is set to the level detection.

When it is level detection interrupts, the interrupt request signal is generated during the duration of IRQ pins in low level, and the interrupt request signal is not generated during the duration of IRQ pins in high level.

Therefore, it is necessary for IRQ pin to be in low level until the interrupt is received.

Suitable Products
SH7261
SH7211
SH7206
SH7641
SH7124, SH7125
SH7146, SH7149
SH7144, SH7145
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