hello.I’ve just downloaded “NET+50/NET+20M BGA/PQFP Schematic, version 7.2 (75KB - ORCAD)”, and now I have got a question about two pins. they are “PHYRST-” at PORTB4 and “BURST_T” at PORTA4. any special reasons why they should be located at there? or just put them to spare pins? thank you.
The burst terminate circuit needs a GPIO pin, any GPIO would due. PortA4 was chosen for no particular reason. The PHY is normally reset with the same signal (rst-) which resets the NetARM. It could also be reset under software control with any GPIO pin.