bq34z110学习过程中，update status一直为4，不更新！

按照bq34z110数据手册（第30页）进行操作：

STEP 8: Run an Optimization Cycle.
1. Start with a fully charged and relaxed battery.  
2. Temporarily Adjust the Cell BL Set Volt Threshold so as not to affect a full discharge.
3. Send the IT Enable command 0x21. The VOK and QEN flags should be set.
4. Discharge the battery at C/10 until the battery is empty.

5. Allow the battery to relax. Wait for The OCV reading to be taken and the VOK flag to clear. The update 

status should now be set to 5.

做完第四步之后，等了10多个小时VOK flag 一直没有clear。update status 也一直停留在4，并没有更新为5.

请问是哪里配置不对还是怎么了？update status从4更新到5需要满足什么条件？

我的也是