maximum input frequency on GPIO port of nRF52840

[manoj008]

Hi,

What is the maximum frequency that i can capture on GPIO port of nRF52840 ?

I'm planning to capture a frequency of 32MHz from a sensor on GPIO pin , can I do this ?

Thanks,

[awneil]

I'd just have to look it up in the Product Specification.

[Jørgen Holmefjord]

Hi,

There is no way to read GPIOs at a regular interval, other than reading the state of the pin/port in a timer interrupt. The timer runs at maximum 16 MHz, but you will not be able to sample that fast. There are two peripherals in nRF52840 that can operate on higher frequencies, high-speed SPI (SPIM3) and QSPI, both running at up to 32 MHz.

Best regards,
Jørgen