When the dsp power failure, how to store large amounts of data?

Hello Tin,

You may need to have backup battery or super capacitors for power backup and a non-volatile memory device to store the data. During power failure, you could store the data from the volatile memory like DDR to the non-volatile memory like flash memories.

In software, you have to detect the power failure and run a subroutine to transfer the data. Please note the time taken for the data transfer should at least match or less than the power backup time.

Regards,
Senthil