Arduino® Nano 33 IoT
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Arduino® Nano 33 IoT / Rev. 01 - 06/12/2021
Pin Function Type
Description
27
D9/PWM
Digital
GPIO; can be used as PWM
28
D10/PWM Digital
GPIO; can be used as PWM
29
D11/MOSI Digital
SPI MOSI; can be used as GPIO
30
D12/MISO Digital
SPI MISO; can be used as GPIO
5.3 Debug
On the bottom side of the board, under the communication module, debug signals are arranged as 3x2 test pads
with 100 mil pitch. Pin 1 is depicted in Figure 3 – Connector Positions
Pin
Function
Type
Description
1
+3V3
Power Out
Internally generated power output to be used as voltage reference
2
SWD
Digital
SAMD11 Single Wire Debug Data
3
SWCLK
Digital In
SAMD11 Single Wire Debug Clock
4
UPDI
Digital
ATMega4809 update interface
5
GND
Power
Power Ground
6
RST
Digital In
Active low reset input
6 Mechanical Information
6.1 Board Outline and Mounting Holes
The board measures are mixed between metric and imperial. Imperial measures are used to maintain a 100 mil
pitch grid between pin rows to allow them to fit a breadboard whereas board length is Metric.
Layout
