https://devzone.nordicsemi.com/f/nordic-q-a/72292/nrf52-spi-clock-tri-stateI use arduino to program a nRF52832 board. I had problems to move a running project with a ST7789 SPI display to the nRF52832. I use the Adafruit lib to drive the display: name=Adafruit ST7735 and ST7789 Library version=1.6.0 author=Adafruit maintaineren-USTelligent Community 13Wed, 03 Mar 2021 11:57:45 GMThttps://devzone.nordicsemi.com/thread/297482?ContentTypeID=1Wed, 03 Mar 2021 11:57:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:09a62f7d-7b73-4fb1-a274-22fbe37dfe5aKenneth<p>I haven&#39;t played with the library specific, but it is common to disable a peripheral when not in use to save current consumption. When a peripheral is disabled (e.g. spi) then the pin will fall back to the gpio configuration (which by default is high impedance disconnected = floating), so you may need to set the gpio to your&nbsp;preferred&nbsp;level to ensure it has a fixed values between spi transacation (which may depend on the spi mode that is used) or you can place a pull-up on the pin.</p> <p>Kenneth</p><div style="clear:both;"></div>