There is some information which should be kept while system power is off. The flash memory is a non-volatile memory so it is a very good choice in this case.
There are a system data area for the system and a user data area for user data in the flash memory of PHPoC.
|system data area (/mmap/envs)||the area which values for system are saved into||network related data, other system data|
|user data area (/mmap/envu)||the area for user data||user data|
There is only user data area information in this document. Please refer to other document for the system data area.