Hi , I have to come here again .
Two boards have been boot up correctly , but the third board has no CPU power rail generated by TPS65930.
The VBAT is 4.2V and PWRON is directly connected to VBAT, a 0ohm resistor has been used to bridge pin P14 "TEST.RESET" to GND as design_in guide suggested .
I found REGEN never went up. I had tried to measure some LDO output , which seemed directly output from VBAT,buf failed to find the desired output voltage , all were 0;
I don't know where is the issue and where is the begining to debug and find the bugs since two boards are OK.
Could you provide some suggestions or provide some docs which describes the TPS65930 internal power up events or needed external conditions?
Thanks very much!
