To learn about the functions of the pins 481 please refer to their datasheets. An environment with temperatures higher than 85°C should not be used for the CPU microprocessor. There are many applications that use the CPU with Surface Mount mounted.
ALXC700EETH2VC-C3 Features
ALXC700EETH2VC-C3 Applications
There are a lot of AMD ALXC700EETH2VC-C3 Microprocessor applications.