Ref. Description Ref. Description
U5 APDS-9660 Ambient Module DL2 Led Power
Bottom:
Board topology bot
Ref. Description Ref. Description
SJ1 VUSB Jumper SJ2 D7 Jumper
SJ3 3v3 Jumper SJ4 D8 Jumper
2.2 Processor
The Main Processor is a Cortex M4F running at up to 64MHz. Most of its pins are connected to the external headers, however some are
reserved for internal communication with the wireless module and the on-board internal I
2
C peripherals (IMU and Crypto).
NOTE: As opposed to other Arduino Nano boards, pins A4 and A5 have an internal pull up and default to be used as an I
2
C Bus so
usage as analog inputs is not recommended.
2.3 Crypto
The crypto chip in Arduino IoT boards is what makes the difference with other less secure boards as it provides a secure way to store
secrets (such as certificates) and accelerates secure protocols while never exposing secrets in plain text.
Source code for the Arduino Library that supports the Crypto is available [8]
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