Hi all, what physical DIO pins are used for programming? I am building a custom board and am having trouble figuring out from the datasheet which pins to use. I come from a background with Nordic nRF series chips and it’s very easy to understand - 4 routes, VDD GND SWDIO SWDCLK. It appears to program a board with JLink, this RSL10 needs 5 connections? JTag IN, JTag OUT, then a clock signal, VDD and GND.
I can see that DIO and  are JTag in and out, and you can source VDD/GND from anywhere, but what pin supplies clock signal for programming? And why are there 2 DIO pins for JTag, why not one line for IO?