nRF52832 SPIS Tvso timing issue

[Atlas]

Hi

We measured the SPIS waveform and found some issue on tspis, vso.

In nRF52832 v1.4 page 303, the max value of tspis, vso is 19ns but we measured it is around 39ns~49ns and it works well.

Have any side effect in this and how to fixed this issue?

Please refer attach file and advise.

Thanks.

Atlas

[haakonsh]

Hey Atlas,

You waveform looks a bit capacitively loaded, it might be that the probes you're using or another part of the circuit adds a significant amount of capacitance and therefore a longer rise time of the signal. 

I do not know what side effects to expect, but I suggest that you set the GPIOs as high drive at least in logic high (NRF_GPIO_PIN_S0H1) in order to reduce the rise time.