https://devzone.nordicsemi.com/f/nordic-q-a/87691/spis-and-ppi-questionhello, Im using nrf52840 Im trying to emulate a chip select signal for spi slave with gpiote and ppi. I used an active high signal as an event and a signal(cs) that is toggled on any event signal edge. i then connected the task and event using ppi.en-USTelligent Community 13Mon, 09 May 2022 09:28:35 GMThttps://devzone.nordicsemi.com/thread/366874?ContentTypeID=1Mon, 09 May 2022 09:28:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2283b3e9-9533-4dac-8248-0e7f4e6aef4eJared<p>Hi there,</p> [quote user=""] I used an active high signal as an event and a signal(cs) that is toggled on any event signal edge. i then connected the task and event using ppi. while testing[/quote] <p>Exactly what event are you asserting the CS pin on? Maybe it would be easier if you showed me this part of your code?</p> [quote user=""] I notice that the cs pin takes a little more time than expected to toggle which corrupts data received by spis.[/quote] <p></p> <p>How much time is there between the event fires and the CS pin is asserted? Do you have a logical analyzer, could you share a trace that highlights this?&nbsp;</p> <p>regards</p> <p>Jared&nbsp;</p><div style="clear:both;"></div>