TI中文支持网Other Parts Discussed in Thread:BQ40Z50
您好，有三个问题请教下。
1、请问下为什么我ID学习，updata status总是到不了05。已经按照这个步骤操作了：
A typical C/2 charge rate is recommended; however, the charge rate is of no consequence.
•
Make sure IT is already enabled at this point before the start of charge (the [Gauge_EN] bit in the
manufacturing status() register should be set).
•
At the start of charge, the [VOK] bit in the IT status () register sets automatically.
•
At the end of charge the [FC] bit in the Battery Status () register should be set automatically. If it did
not set then a full charge was not properly detected and the learning cycle fails. Correct either the
charging conditions or the relevant dataflash settings to ensure the [FC] bit gets set and try again from
the beginning
2、放电之前发0x41 VOK置1，RDIS置0，再发0X21则VOK置0，RDIS置1.请问放电过程VOK和RDIS应该处于什么状态。我看TI文档，看到了两个说法。
3、MAXerror一直是100%这个没影响吧，学习成功会自动变为1%吧？
Star Xu：
您好，关于学习请参考下面的traing视频
training.ti.com/how-perform-successful-learning-cycle-gauges
MAXerror会自动更新，以BQ40Z50为例
一般100%表示full reset
5% RA-table 更新
3% Qmax更新
1%RA-table 和QMAX 更新，表示学习成功
,
user6014640：
看视频还需要VCT置1，现在没有置1，是这个原因吗？TC FC都置1了，TCSETVST和FCSETVCT也置1了。
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user6014640：
,
Star Xu：
您好，VCT表示有效的充电截止，请参考TRM 4.6 Valid Charge Termination
www.ti.com/…/sluubc1d.pdf
