TPS65217C的PB_IN脚问题

看手册说是pb_in是接电池的时候，需要接一个开关，然后低电平触发开机

我也是悬空的

目前pmic上电电压都正常，不过时序没有测

还有一个问题，我的板子全都起不来，uart0 保持3.3V高电平，tx，rx都是

确认复位和sysboot都对

不知你那边有啥建议没有？

Figure 24 (Global State Diagram) shows the possible power on scenarios. From the OFF state, USB or AC detection can cause a power on, so if they are used then PB_IN can be floating. If a start-up condition is needed without USB or AC being plugged in, then a falling edge on PB_IN needs to be generated.

As noted in the upper right corner of Figure 24, if PB_IN is tied to GND, then after 8 s the device will reset (long key press, similar to a phone / smart watch / etc).