1, <sch> add SW1 to configure boot selection from NAND or USB
2, <sch> change U6 pin definition pin1 = GND, pin2= OUT
3, <bom> delete R9 to be NC
4, <bom> add SW1 ESP40XX
2, Add USB HOST circuits which including
a) Micro-AB Receptacle,
b) Use a P-Channel MOSFET to switch 5V to external device by ID signel Hi or Low
detection
c) Add LT3925EDCB to convert battery voltage to USB power need