Re:Verilog Ethernet: Work-in-Progress 100BASE-TX PHY
by crote on Friday March 17, 2023 @10:38AM
(#35197688)
Same reason virtually all keyboards and mice still use USB 1.2: if you don't need the speed, why go through all the trouble trying to design for a way more complicated standard?
You can bitbang USB over a wet string with an ATtiny. If you want USB 2.0 you need dedicated hardware for it in your MCU, and you need to pay some attention to your PCB design. With USB 3.0 you need an expensive MCU, and you need to actually pay close attention to PCB design to ensure the signal remains intact. USB 3.1 and above is basically magic.
The same will apply to Ethernet: stick to the slowest standard which is sufficient for your application to save yourself a lot of headache.
You can bitbang USB over a wet string with an ATtiny. If you want USB 2.0 you need dedicated hardware for it in your MCU, and you need to pay some attention to your PCB design. With USB 3.0 you need an expensive MCU, and you need to actually pay close attention to PCB design to ensure the signal remains intact. USB 3.1 and above is basically magic.
The same will apply to Ethernet: stick to the slowest standard which is sufficient for your application to save yourself a lot of headache.