Battery Backed RAM (BBRAM)
The BBRAM APIs allow interfacing with the unique properties of this memory region. The following common types of BBRAM properties are easily accessed via this API:
IBBR (invalid) state - check that the BBRAM is not corrupt.
VSBY (voltage standby) state - check if the BBRAM is using standby voltage.
VCC (active power) state - check if the BBRAM is on normal power.
Size - get the size (in bytes) of the BBRAM region.
Along with these, the API provides a means for reading and writing to the memory region via
bbram_read() and bbram_write() respectively. Both functions are expected to only
succeed if the BBRAM is in a valid state and the operation is bounded to the memory region.