Tool/software:
Hello,
I would like to use a GPIO interrupt to trigger a wake-up the CC2340R5, but I have a concern that my input pulse duration may be too short.
As I understand, the interrupt can be triggered by a rising or falling edge on the GPIO voltage.
In my system, the GPIO is in a normally low state, then the voltage rises to a high state, remains at the high state for an amount of time (t), then falls back down to a low state. The exact time (t) to target is something that will affect the hardware design of the system.
My question is - what is the minimum acceptable duration of this time (t)? I understand that there is a terminal capacitance of 7 pF, so there will be a time constant associated with charging this, but I was wondering if there are any other considerations.
Perhaps related, in the datasheet, in the I2C section, a "Pulse duration of spikes suppressed by input deglitch filter" (tSP) is listed as 50 ns. Is there any internal filtering on the GPIOs that I should be aware of, in the context of edge interrupts?
Thank you