https://devzone.nordicsemi.com/f/nordic-q-a/58161/mosi-output-confusion-when-the-speed-less-5-tickHi there, I&#39;m working on nrf52832 and using a PPI channel between a Timer and an SPI to output a voltage, for now, it works fine. But when I try to make it faster, e.g every 4 clock tick at 16Mhz timer send a byte by SPI, the pulse in the digitalen-USTelligent Community 13Mon, 24 Feb 2020 10:36:24 GMThttps://devzone.nordicsemi.com/thread/235921?ContentTypeID=1Mon, 24 Feb 2020 10:36:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e00cb7ce-9cde-43bb-913b-97dc3df9ef33J&#248;rgen Holmefjord<p>Hi,</p> <p>You will need to wait for the SPI transfer to finish before starting a new one. The transfer time of one byte will be more than 5 tick on the 16 MHz timer when you run SPI on 8 MHz. There may also be some overhead on starting/stopping a transfer in the HW peripheral, see <a href="https://devzone.nordicsemi.com/f/nordic-q-a/56180/reduce-time-between-spi-transfers/227755#227755">this post</a>.</p> <p>Best regards,<br />Jørgen</p><div style="clear:both;"></div>