[srinibas]

Originally Posted by shadab_a4u

I have opened some Spiderman Box and found NXP controller in it, with some ROMs, switches.

Basically, every pin finder, as i think, checks pins for RX/TX level voltages, and sequentially puts RX and TX signal to them and tries to read reply.

A successful transmit of data, and then a expected correct reply confirms about RX TX pins.

Just my 2 cents.

Br,
Shadab Ahmad

Yes you r absolutely right . this is the main logic to find TX RX / DP DM

Same logic will not applicable with all CPU .