https://devzone.nordicsemi.com/f/nordic-q-a/83456/generating-clock-on-gpioHi team, I am trying to generate pulses on a GPIO using timer1. The pulse need not to be very accurate. To start with I used the below given code to generate a clock frequency of 1.6 MHz. /* Start 16 MHz crystal oscillator */ NRF_CLOCK-&gt;EVENTS_HFCLKSTARTEDen-USTelligent Community 13Fri, 07 Jan 2022 14:30:06 GMThttps://devzone.nordicsemi.com/thread/346725?ContentTypeID=1Fri, 07 Jan 2022 14:30:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d6709ccd-787a-425e-ac38-f94f0f27a691Vidar Berg<p>Hi,</p> <p>Any read access to the peripheral bus will stall the processor until the transfer is completed, and I guess that is part of the reason you only get 347 KHz. The nrf_gpio_pin_toggle() is also relatively slow as it first reads the current output state before writing the new state. It would be faster if you used a GPIOTE toggle task for this (<span><a href="https://infocenter.nordicsemi.com/topic/ps_nrf52810/gpiote.html?cp=4_5_0_5_8_3_7#register.CONFIG-0-7">CONFIG[n]</a></span>).</p> <p>I can help set up a sample with PPI if that&#39;s of interest.</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>