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
a) Added D6/MSCD104 for raising efficiency
b) Changed C57 to 0.1uF/16V, C49 to 1uF/16V, TP31 to CKE
c) Added R46/10k/5%,
d) Added TP85 for +5V USB host voltage measurement
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
