I have questions about the power supply pins of HTCC-AB02 board: Based on Heltec web site, I found the schematics, pin out and power consumption of AB02 board (attached). My question:
- Is there a description for each of the 4 power pins: Vs, Vext, Vin and Vdd?
- The schematic does not show the details of the two power management blocks. Is there a detailed schematics for the two blocks on the schematics?
- On the electrical characteristics chart, what is pin of the “3V header powered” (with 3.5 uA) in sleep mode?