I am using the WIZ830MJ module to send UDP packets.
I finished work with him last night, everything was fine. The wiring diagram did not change, nobody touched the module and the board.
Today, after turning on the power, it stopped working. Diagnostics show that the W5300 chip is in permanent reset mode - reading the MR register gives the value 0x0080. The Reset pin is constantly connected to the power supply plus, but a short-term connection to the ground does not change anything.
The module does not respond to any commands.
What happened, please tell me.