steve_mI've implemented bit-banged 100 Mbit/s Ethernet UDP transmission on the RP2040/RP2350. That is sufficient to transfer the data of the internal ADC overclocked to 5 MSPS and digitize some IF signal...
Kevin Karhan 
@kkarhan What do you mean? The MCU is running at 250 MHz (double the Ethernet bit rate), with normal core voltage. It doesn't even get warm.
@steve_m really?
Huh...
Next thing you gonna tell me you're OpenSourcing it as a.general-pirpose Ethernet adaptor to DIY with pinout and firmware to fladh and add a socket to...
@kkarhan Yeah, I'll release it as OSS in the next weeks after ironing out some things and doing some proper host-side receive code.
@steve_m Cool, cuz that'll certainly make it a nifty choice for many projects...
MadMike77@MadMike77 @steve_m Eeyupp!