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bq24250 general purpose register?

Other Parts Discussed in Thread: BQ24250

Hello

I am playing with my evaluation board and I noted that this device has some non-documented registers that seem to be writable without interfering the functioning of the bq24250.

The documented registers are 00h, 01h, 02h, 03h, 04h, 05h and 06h. I've found that the registers 42h and 43h are writable. By default, register 42h have the value 00h, and the register 43h have the value 59h. I've tried to write some random values on them and they keep their values while the device is powered. Actually, I've noted that I can write on the registers 07h, 44h and 45h (I2C ACK), but they don't keep the given values.

I want to know if I can use them to store known values to check if there was a total discharge of my battery when I boot my application.