Arduino® Nano 33 IoT
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Arduino® Nano 33 IoT / Rev. 01 - 06/12/2021
5.1 USB
Pin Function Type
Description
1
VUSB
Power
Power Supply Input. If board is powered via VUSB from header this is an Output
(1)
2
D-
Differential USB differential data -
3
D+
Differential USB differential data +
4
ID
Analog
Selects Host/Device functionality
5
GND
Power
Power Ground
1. The board can support USB host mode only if powered via the V
USB
pin and if the jumper close to the VUSB
pin is shorted.
5.2 Headers
The board exposes two 15 pin connectors which can either be assembled with pin headers or soldered through
castellated vias.
Pin Function Type
Description
1
D13
Digital
GPIO
2
+3V3
Power Out
Internally generated power output to external devices
3
AREF
Analog
Analog Reference; can be used as GPIO
4
A0/DAC0
Analog
ADC in/DAC out; can be used as GPIO
5
A1
Analog
ADC in; can be used as GPIO
6
A2
Analog
ADC in; can be used as GPIO
7
A3
Analog
ADC in; can be used as GPIO
8
A4/SDA
Analog
ADC in; I2C SDA; Can be used as GPIO (1)
9
A5/SCL
Analog
ADC in; I2C SCL; Can be used as GPIO (1)
10
A6
Analog
ADC in; can be used as GPIO
11
A7
Analog
ADC in; can be used as GPIO
12
VUSB
Power
In/Out
Normally NC; can be connected to VUSB pin of the USB connector by shorting a
jumper
13
RST
Digital In
Active low reset input (duplicate of pin 18)
14
GND
Power
Power Ground
15
VIN
Power In
Vin Power input
16
TX
Digital
USART TX; can be used as GPIO
17
RX
Digital
USART RX; can be used as GPIO
18
RST
Digital
Active low reset input (duplicate of pin 13)
19
GND
Power
Power Ground
20
D2
Digital
GPIO
21
D3/PWM
Digital
GPIO; can be used as PWM
22
D4
Digital
GPIO
23
D5/PWM
Digital
GPIO; can be used as PWM
24
D6/PWM
Digital
GPIO, can be used as PWM
25
D7
Digital
GPIO
26
D8
Digital
GPIO
