https://devzone.nordicsemi.com/f/nordic-q-a/23408/drain-current-on-txd-pinHi, I'm interfacing a nrf51822 and a H8/3294. My question is how much can I drain a the txd pin of the H8/3294. That means my question isn't really about nrf51822. In documentation of H8/3294 I found : Allowable output high current (per pin) | Allen-USTelligent Community 13Tue, 14 Nov 2017 10:43:53 GMT