https://devzone.nordicsemi.com/f/nordic-q-a/1902/nrf51822---is-it-possible-to-use-hardware-flowcontrol-half-a-wayThat means, that the nRF51822 is always allowed to send, but on it&#39;s receiving side, he could slow down the opponent side by using it&#39;s Rts line? I now, I could archive that by just fixing the nRF51822&#39;s Cts input to Gnd. The question is, if it is alsoen-USTelligent Community 13Mon, 17 Mar 2014 15:19:45 GMThttps://devzone.nordicsemi.com/thread/8190?ContentTypeID=1Mon, 17 Mar 2014 15:19:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1ddb14b8-2815-4504-84c4-0a997203861bOle Morten<p>It seems it should work to just leave the PSELCTS register unset, which the nRF51822 will interpret as CTS always asserted, meaning it assumes it&#39;s always allowed to set. However, this is somewhat unspecified, so I can&#39;t right now guarantee that this will always be possible, on all future variants of the nRF51822, so please make sure you test this explicitly on all revisions you&#39;ll use for production.</p> <p>Another option could be to configure CTS to use P0.31. This is a GPIO that isn&#39;t actually bound to a pin on the QFN48 package, so if you configure the CTS to use this pin and configure the pin to be pulled down, you should achieve the same.</p><div style="clear:both;"></div>