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BQ40Z50-R2: Golden Learning fails, Updata Status is always 0X04

Part Number: BQ40Z50-R2

Hi team,

Golden Learning failed, and the customer would like to know the reason.

During S2 phase, FC set, 2 hours after static, then finds REST = 1, VOK = 0, but the Updata Status is always 0X04, no change, and no further learning is possible. (In S0 phase, GAUGE_EN = 0 disabled, 5 hours static, then GAUGE_EN = 1, S2 phase starts charging).

Remain the same after repeating a few times during the S0-S2 phase, looking for gg.csv, and finding that the EoC has been updated. The gg files are as follows:

https://e2echina.ti.com/cfs-file/__key/communityserver-discussions-components-files/24/1r2_5F00_11_5F00_12DLearnDsg.gg.rar

Could you help check this case? Thanks.

Best Regards,

Cherry