Datasheet
PC5
PCINT
13
ADC5 SCL
28
AREF21
GND
PD0
PCINT
16
RXD
2
0
PD1
PCINT
17
TXD
3
1
INT0PD2
PCINT
18
4
2
INT1PD3
PCINT
19
OC2B
5
3
PD4
PCINT
20
SCK
6
T0XCK
4
PD5
PCINT
21
11
T1 OC0B
5
PD6
PCINT
22
SCK
12
OC0AAIN0
6
PD7
PCINT
23
13
AIN1
7
PB0
PCINT
0
SCK
14
CLKO ICP1
8
PB1
PCINT
1
15
OC1A
9
PB2
PCINT
2
SS
16
OC1B
10
PB3
PCINT
3
MOSI
17
OC2A
11
PB4
PCINT
4
MISO
18
12
PB5
PCINT
5
SCK
19
13
PC4
PCINT
12
ADC4 SDA
27
18 A4
19 A5
PC6PCINT
14
RESET 1
3V3
IOREF
5V
Vin
GND
NC
GND
SCL
PC5PCINT
13
28ADC5
19 A5
SDA
PC4PCINT
12
27
ADC4
18 A4
PC3PCINT
11
26ADC3
17 A3
PC2PCINT
10
25ADC2
16 A2
PC1PCINT
9
24ADC1
15 A1
PC0PCINT
8
23
ADC0
14 A0
1
ICSP Pinout
PC6PCINT
14
1RESET
GND
5V
PB5
PCINT
5
SCK
19
PB4
PCINT
4
MISO
18
PB3
PCINT
3
MOSI
17
OC2A
Connected to the ATmega and used for USB
IOREF
Logic reference voltage for shields that
use it. Is connected to the 5V bus
3V3
The Absolute output from the 3.3V regulator
is MAX 150MA
Vin
PWM Pin
Port power group
Power
GND
Physical PIN
Port PIN
Analog PIN
Serial PIN
PIN Function
Interrupt PIN
Control PIN
IDE
Vin
GND
USB JACK
Micro Type B
Absolute MAX per pin
Absolute MAX per pin
Absolute
for the entire package
The total current of each
should
not exceed 100mA
When I/O level is 3.3V
I/O level Selection
Disable Autoreset
RESET
METRO
09 MAY 2017
ver 2 rev 0