Datasheet
5V
GND
GND
5V
GND
5V
GND
GND
5V
GND
GND
GND GND GNDGND
5V
MIC5205
GND GND
3.3V5V
GND
GND
5V
GND
5V5V
GND
GND
FT231XS
GNDGND
GNDGND
GNDGND
GND
5V3.3V
VIN
GND
5V
GND
VIN
RESET
MBRA140
AD
5V
ATMEGA328P_TQFP
U2
IN
GND
OUT
EN
BP
ADJ
IN OUT
1A*2
2A*2
3A*2
4A*2
5A*2
6A*2
7A*2
8A*2
9A*2
10A*2
JP10
1A*2
2A*2
3A*2
4A*2
5A*2
6A*2
7A*2
8A*2
D+
D-
VBUS
GND
ID
MTN3
MTN1
MTN2
MTN4
1 2
3 4
5 6
VCC
15
VCCIO
3
3V3OUT
13
USBDM
12
USBDP
11
RESET
14
GND
6
GND
16
TXD
20
CBUS3
19
CBUS2
10
CBUS1
17
CBUS0
18
RI
5
DCD
8
DSR
7
DTR
1
CTS
9
RTS
2
RXD
4
U1
S1
1 3
42
D1
1A*2
2A*2
3A*2
4A*2
5A*2
6A*2
7A*2
8A*2
JP13
1A*2
2A*2
3A*2
4A*2
5A*2
6A*2
U4
PB5(SCK)
17
PB7(XTAL2/TOSC2)
8
PB6(XTAL1/TOSC1)
7
GND
3
GND
5
VCC
4
VCC
6
AGND
21
AREF
20
AVCC
18
PB4(MISO)
16
PB3(MOSI/OC2)
15
PB2(SS/OC1B)
14
PB1(OC1A)
13
PB0(ICP)
12
PD7(AIN1)
11
PD6(AIN0)
10
PD5(T1)
9
PD4(XCK/T0)
2
PD3(INT1)
1
PD2(INT0)
32
PD1(TXD)
31
PD0(RXD)
30
ADC7
22
ADC6
19
PC5(ADC5/SCL)
28
PC4(ADC4/SDA)
27
PC3(ADC3)
26
PC2(ADC2)
25
PC1(ADC1)
24
PC0(ADC0)
23
PC6(/RESET)
29
USB
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