Schematic

GND
GND
GND GND
GND
GND MCP73831
GND
GND
GND GND
GND
GNDGND
3.3V
GND
3.3V
GND
3.3V3.3V
GND
3.3V
GND
3.3V
3.3V
GNDGND
GND
3.3V
3.3V
GND
GND
GND
ATSAMD21G
GND
GND
GND
GND
3.3V
BAT20J
GND
2.5A/30V
V_USB
3.3V
3.3V
V_BATT
V_BATT
V_BATT
V_USB
V_USB
GND
VIN
U1
VIN
4
STAT
1
VBAT
3
PROG
5
VSS
2
IN
GND
OUT
EN
NC
D+
D-
VBUS
GND
ID
SHIELD*10
1
2
1
2
1 2
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
2
1
1
2
3
4
1
2
3
4
5
6
7
8
9
J13
GNDANA
5
PA00(XIN32/SER1:0/TC2:0)
1
PA01(XOUT32/SER1:1/TC2:1)
2
A0_PA02(AIN0/DAC)
3
PA03(AIN1/REFA)
4
D8_PA06(AIN6/SER0:2/TC1:0)
11
VDDANA
6
A1_PB08(AIN2/SER4:0/TC4:0)
7
A2_PB09(AIN3/SER4:1/TC4:1)
8
A3_PA04(AIN4/REFB/SER0:0/TC0:0)
9
A4_PA05(AIN5/SER0:1/TC0:1)
10
D9_PA07(AIN7/SER0:3/TC1:1)
12
PA08(I2C/AIN16/SER0:0+)_D4
13
PA10(AIN18/SER0:2+)_D1/TX
15
PA09(I2C/AIN17/SER0:1+)_D3
14
PA11(AIN19/SER0:3+)_D0/RX
16
VDDIO
17
GND
18
PB11(SER4:3+)_SCK
20
PB10(SER4:2+)_MOSI
19
PA12(I2C/SER2:0+)_MISO
21
PA13(I2C/SER2:1+)
22
PA14(XIN/SER2:2+)_D2
23
PA15(XOUT/SER2:3+)_D5
24
PA16(I2C/SER1:0+)_D11
25
PA17(I2C/SER1:1+)_D13
26
PA18(SER1:2+)_D10
27
PA19(SER1:3+)_D12
28
PA20(SER5:2+)_D6
29
PA21(SER5:3+)_D7
30
PA22(I2C/SER3:0+)_SDA
31
PA23(I2C/SER3:0+)_SCL
32
PA24(SER3:2+)
33
PA25(SER3:3+)
34
GND
35
VDDIO
36
PB22(SER5:2+)
37
PB23(SER5:3+)
38
PA27
39
RESET
40
PA28
41
GND
42
VDDCORE
43
PA30(SWCLK/SER1:2+)
45
VDDIN
44
PA31(SWDIO/SER1:3+)
46
A5_PB02(AIN10/SER5:0)
47
PB03(AIN11/SER5:1)
48
U4
RESET
3.3V
ANT
DIO0
DIO1
DIO2
DIO3
DIO4
DIO5
GND
MISO
MOSI
NSS
SCK
U3
D3
Q1
Released under the Creative Commons
Attribution Share-Alike 4.0 License
https://creativecommons.org/licenses/by-sa/4.0/
Design by:
USB