我在应用BQ40Z50时，遇到一些问题：数据电平（第九位）有拉不低现像，时钟有时也不高不低。如下图：望各位大神解答，谢谢！
When I use BQ40Z50, I encounter some problems: data level (No. 9) can not be pulled down, and the clock is sometimes not too high or too low. The following picture: I hope you can answer, thank you!
应用电路路如下图：电池输出直接DSP，内部上拉到1.8V
The application circuit is as follows: Battery output direct DSP, internal pull-up to 1.8V
