OVRD_ALERT (Bit 4): External pull-up on the ALERT pin indicator. Only active when ALERT pin is not already
being driven high by the AFE itself.
0 = No external override detected
1 = External override detected. Remains latched high until cleared by the host.
在ALERT引脚上下接470K欧电阻，并接470pF电容，接入MCU引脚配置为输入态，对BQ76940上电后读SYS_STAT状态值bit[4]一直为1，写入1亦无法消除，不知哪抽风了一直检测异常，望指导。
