Yes. When the program flash of the MAX79356 is corrupted, the part can become unresponsive upon power-up. The solution is listed below:
- Disconnect all source of power including UART0/1 to MAX79356 (note that reset will not help in this case).
- Press and hold PROG pin.
- Power up the part.
- Release PROG Pin.
It should now be in PROG mode. Then, use the zenoldr.exe utility to reprogram the flash to one of the standard combined MAC-PHY FWs.