Debug; Mechanical Information; Board Outline And Mounting Holes - Arduino Nano 33 IoT Product Reference Manual

Pin Function Type
27 D9/PWM Digital
28 D10/PWM Digital
29 D11/MOSI Digital
30 D12/MISO Digital

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
1 +3V3 Power Out
2 SWD Digital
3 SWCLK Digital In
4 UPDI Digital
5 GND Power
6 RST Digital In

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.
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Description
GPIO; can be used as PWM
GPIO; can be used as PWM
SPI MOSI; can be used as GPIO
SPI MISO; can be used as GPIO
Description
Internally generated power output to be used as voltage reference
SAMD11 Single Wire Debug Data
SAMD11 Single Wire Debug Clock
ATMega4809 update interface
Power Ground
Active low reset input
Layout
Arduino® Nano 33 IoT / Rev. 01 - 06/12/2021
Arduino® Nano 33 IoT