BQ27531-G1: 与bq24192I配合使用时，提示[AUTHFAIL]，如何修改ProductNumber？

1、BQ27531-G1与BQ24192I配合使用时，提示[AUTHFAIL]如下；

2、查询bq27531-G1手册发现是Product Number设置不符合导致，

3、查询bq2419x手册发现ProductNumber如下；

4、那么要如何修改DataFlash里的这个ProducNumber的值？

Eric Gyj：

调试BQ27531-G1+BQ24192方案时，Data Flash里的Product Number是40，可以正常使用；BQ24192I的Product Number到底要怎么换算的？

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Star Xu：

您好，The solution to the problem is to set the Product Number in the DF.

The gauge firmware performs the following check for charger authentication:

Read the data from the CHGR_REV_ADDR charger register.
Bitwise AND this data with (CHGR_REV_PN2 | CHGR_REV_PN1 | CHGR_REV_PN0)
This must match ChargerInfo->Product Number (subclass 0x4C, block 0, offset 24, 1 Byte).

If this doesn’t match for 3 attempts then it will set the CHRG_I2C_STAT_AUTHFAIL bit

详细请参考下面的链接

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/921186/bq27531-g1-table-3-14-chrgr_rev_rega-bit-definitions-pn-2-is-set-authfail-flag-set-in-chargerstatus-register/3426172?tisearch=e2e-sitesearch&keymatch=BQ27531-G1%252525252520AUTHFAIL#3426172