Thread: [HW-FIX] losing time/date on battery swap? Replace bupbat
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joerg_rw is offline joerg_rw
2015-10-15 , 15:41
Posts: 2,222 | Thanked: 12,651 times | Joined on Mar 2010 @ SOL 3
#22
hmm, the charging *should* be enabled per default, afaik. You might want to check the registers, and/or probe voltage on bupbat during and after inserting main battery and attaching wallcharger
maybe useful: http://www.ti.com/lit/an/swca025/swca025.pdf
actually seems it's not on per default: http://www.datasheetarchive.com/SWCU050G-datasheet.html

In the boot sequence for the device, going from wait-on to active mode, the backup battery charging sequence must be initiated by setting the BB_CFG[4] BBCHEN bit to 1.
[ SWCU050G – April 2008 – Revised December 2010 p438 "7.4.2.1 Backup Battery Charger"]
I would have expected this getting done by NOLO
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Last edited by joerg_rw; 2015-10-15 at 16:30.
 

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