Datasheet

220
103
104
220
105
105
010
222
GND
GND
INT3
INT1
INT2
SDA
42
AREF
PF7TDI 36ADC7
PF0 41ADC0
PF6TDO
37
ADC6
VBUS
VBAT
PB1PCINT
1
9
INT0
PD0 SCLOC0B
PC6 OC4AOC3A
PD7
ADC10
OC4DT0
T1
PD1
19
13
RESET
3V3
7PF5TMS 38ADC5
PF4TCK
SCLK
PB2PCINT
2
10
PDIMOSI
PB3PCINT
3
11
PDOMISO
PD2 20
RXD1
PD3 21
TXD1
39
ADC4
PF1 40
ADC1
PCINT
5
PB5
ADC12OC1A OC4B
PCINT
6
PB6
ADC13
ADC9
OC1B OC4B
RTS
PCINT
7
PB7
OC1C OC0A
PD6
OC4D
PC7
32
CLK0 ICP3
En
12
30
29
27
18
31
OC4A
26
2
3
5
11
13
6 A7
1
0
14
16
15
23 A5
22 A4
21 A3
20 A2
19 A1
18 A0
9 A9
10 A10
12 A11
Optional Lipoly Battery
USB JACK
Micro Type B
Absolute MAX per pin

Absolute MAX 200mA for
the entire package
The total current of each port
power group 100mA
Can’t go higher than 3.3V

VBAT

Absolute 
3V3 output from regulator
Absolute MAX 400mA
VBUS
3V3
It’s the positive voltage
from to JST Batt jack

06 MAY 2017
ver 2 rev 2


Power
GND
Physical PIN
Port PIN
Analog PIN
Serial PIN
PIN Function
Interrupt PIN
Control PIN
RESET
32u4 Basic