What is the maximum clk frequency that can be output on a gpio for the nRF52832 ?

[mhaggag]

What is the maximum clk frequency that can be output on a gpio for the nRF52832 ? I want the nRF52832 to output a clk signal on any of the gpios to an external module, and I want to have the maximum clk frequency possible on that pin. So what is the maximum switching frequency for any of the nRF52832 gpio pin ?

What is the best way to implement it (code-wise) at the maximum frequency possible ?

[Carsten Wulff]

The maximum frequency will be limited by the capacitance on the PCB, so it's not possible to answer without knowing the details.

Th maximum frequency will also be limited by how fast you can write to the GPIO output. The fastest you can update the state of the GPIO is 16MHz, so even with no capacitive load you'll be limited to 8MHz output frequency.

[Susheel Nuguru]

also look at this post on nRF51. I was hoping to get double clock output on nRF52 but like carsten Wulff said PCB capacitance also comes into picture.