I made a TX2 carrier board based on the B04 schematic, but it cannot be powered on. I checked the power supply circuit against the circuit diagram and there is no problem with the connection. The current phenomenon of the circuit is:
1.VDD_MOD has voltage directly to SOC;
2. There is no voltage on the VDD_PWR_BAD pin;
3. After plugging in the power supply, pin A48 has a voltage of 1.14V;
4. What effect does this part of the circuit of POWER MONITIORS have on power-on (the manual does not explain the principle and level of this part of the circuit)
I want to know, what are the factors that affect SOC startup?