Other Parts Discussed in Thread: BQSTUDIO, , EV2400
Hello,
I'm working with a customer who is running into the following issue. Can you recommend some troubleshooting steps for this? Thank you!
I'm using the BQStudio software to connect to the BQ35100 eval board via EV2400. At first I was able to change a few of the registers in the flash like the design capacity and as far as I can tell the changes were written. Yesterday, however, I was going through the calibration sequence in the "Using the BQ35100 with Li-Primary Based Applications" app note. When I got the point of putting the device into EOS mode, the attempt to write the GMSEL1 bit never succeeded. The read back comparison that BQStudio does after attempting the write always fails. In attempting to understand what was going on, it seems I managed to get the device back into a default state (with the original 2200mAh design capacity and 2000mV termination voltage.) Now I'm unable to change any of the values in flash.
Is it possible to lock myself out of flash permanently? (UNSEAL still works fine as far as I can tell)
Are there some steps that I may be missing to get the write access to succeed?
Regards,
Ryan B.
