C3 104 R4 100k C1 22P C2 22P J1 B S U GND D+ D- VCC USB 4 3 2 1 +3.3 R2 1.5K R3 R1 3 30 30 U1 AMS1117 AMS1117 VIN VOUT D N G +5 C6 0.1uF C7 4.7uF 1 2 +3.3 C8 1uF +3.3 C9 104 RST EECLK EEDATA 1 2 3 4 R9 1K U3 CS CLK DI DO 93C46 VCC NC ORG GND 8 7 6 5 R7 15K R8 15K R5 30 R6 30 R18 30R19 30 C14 22 C15 22 R20 15K R21 15K 4 3 2 1 4 3 2 1 J2 GND D+ B S D- U VCC USB J3 GND D+ B S D- U VCC USB X1 6M +3.3 2 3 1 3 0 3 9 2 8 2 7 2 6 2 5 2 C4 22 C5 22 U2 1 2 3 4 5 6 7 8 C10 22PC11 22P R10 15K R11 15K RST EECLK EEDATA +3.3 D N E P S U S E D O M T X T DP0 DM0 VCC RESET EECLK EEDATA/GANGED GND BUSPWR 1 N O R W P 1 R U C R V O 1 M D 1 P D 2 R U C R V O 2 N O R W P 2 M D 2 P D D N G 1 L A T X 2 L A T X C C V L L P T S T M E M T X E TUSB2046 DP4 DM4 OVRCUR4 PWRON4 DP3 DM3 OVRCUR3 PWRON3 24 23 22 21 20 19 18 17 +3.3 +3.3 TUSB2046B 9 0 1 1 1 2 1 3 1 4 1 5 1 6 1 +3.3 +3.3 R12 30 R13 30 R14 30 R15 30 C12 22PC13 22P R16 15KR17 15K 1 2 3 4 1 2 3 4 C C V - + D D USB D N G C C V - + D D USB D N G J4 J5