Schematic

C2 & C3 to be
near U1G6.32
C4 to be
near U1G6.31
C9 to be
near U4.5
C10 to be
near U5.5
C5, C6 should be
close to U2.1
C1 should be
near U2.5
GND
VIN
3.3V
GND
VCC
10K
GND
2.2uF
1.0uF 0.1uF 0.1uF
VCC
GND
2.2uF0.1uF
GND
VIN
4.7K 4.7K
GND
GND
RED
RED
1K
GND
GND
GND
1K
GND
3.3V
3.3V
3.3V
3.3V
3.3V
PESD1CAN
GND
PESD1CAN
3.3V
USB-MICROB
5V
GND
5V 5V
GND
GND
GND
BAT20J
5V
0.1uF 0.1uF
GND
VIN
SN74LVC1G66
SN74LVC1G66
VIN
VIN
GND
GND
U2
IN
GND
OUT
EN
NC
R1
C1
C2 C3 C4
C5C6
R3 R4
JP1
J2
1
2
3
4
5
D2
SW1
1 3
42
SW2
1 3
42
D3
R5
R6
D4
1
1
2
2
3
3
D1
1
1
2
2
3
3
D+
D-
VBUS
GND
ID
SHIELD1*3
J3
1
2
3
1
2
3
1
2
3
D5
J9
1
2
3
4
5
6
C9 C10
1
4
2
3 5
U4
1
4
2
3 5
U5
P0.0
22
P0.1
23
P0.2
24
P0.3
25
P0.4
26
P0.5
27
P0.6
28
P0.7
29
P1.0
35
P1.1
36
P1.2
37
P1.3
38
P1.4
39
P2.0
1
P2.1
2
P2.2
3
P2.3
4
P2.4
5
P2.5
6
P2.6
7
P2.7
8
P3.0
10
P3.1
11
P3.2
12
P3.3
13
P3.4
14
P3.5
15
P3.6
16
P3.7
17
U1G4
P4.0
18
P4.1
19
P4.2
20
P4.3
21
VCCD
31
VDDA
33
VDDD
32
VREF
40
VSS
9*2
VSSA
34
XRES
30
XRES
XRES
SCL
SCL
SCL
SDA
SDA
SDA
SWD_DATA
SWD_DATA
SWD_CLK
SWD_CLK
TXO
TXO
RXI
RXI
BTN
BTN
LED
LED
ISO_POUR
LED_0
LED_0
LED_1
LED_1
LED_2
LED_2
I2C_OUT_EN
I2C_OUT_EN
I2C_OUT_EN
SDA_OUT
SDA_OUT
SCL_OUT
SCL_OUT
Released under the Creative Commons
Attribution Share-Alike 4.0 License
https://creativecommons.org/licenses/by-sa/4.0/
Design by:
USB B
THIS IS A FOUR-LAYER BOARD!