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description: Information on the ABX00030 SKU
---

# Arduino Nano 33 BLE

Somebody may think that information on the Arduino Nano 33 BLE board should be clear and exact. It turns out that this is not exactly so. I will speak about the ABX00030 variant on this page. Here is the datasheet from the Arduino web site:

* [https://docs.arduino.cc/static/9a5b2c8dfc3d3049722c35896221dac0/ABX00030-datasheet.pdf](https://docs.arduino.cc/static/9a5b2c8dfc3d3049722c35896221dac0/ABX00030-datasheet.pdf)

Processor on the board:

* &#x20;64 MHz Arm® Cortex-M4F (with FPU)
* &#x20;1 MB Flash + 256 KB RAM

This manual gives this picture of the board:

<figure><img src="https://1791219135-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FifYnTDP7IFJCZallDj96%2Fuploads%2FLS47EYwOgeO2Gwl0K1zS%2Fimage.png?alt=media&#x26;token=f3c013f1-743d-4083-b983-fdcfbec5f15b" alt=""><figcaption></figcaption></figure>

The picture above matches what I ordered and received exactly. The manual is also giving this schematic diagram:

<figure><img src="https://1791219135-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FifYnTDP7IFJCZallDj96%2Fuploads%2FYE5UFmgJKmtxb84cJX79%2Fimage.png?alt=media&#x26;token=0c4834da-4395-4a87-a0f2-083a609dfca3" alt=""><figcaption></figcaption></figure>

If you will look carefully, you will see that these two boards differ in details. Manual mentions the following elements on the diagram:

<table><thead><tr><th width="83.33333333333331">ID</th><th width="141">Type</th><th>Notes</th></tr></thead><tbody><tr><td>U1</td><td>NINA-B306</td><td>Main CPU, Bluetooth 5.0 Module</td></tr><tr><td>U2</td><td>LSM9DS1TR</td><td>The 9-axis IMU (Accelerometer, Gyroscope, Magnetometer)</td></tr><tr><td>U6</td><td>MP2322GQH</td><td>Synchronous Step-Down Converter, 1A Load Current</td></tr><tr><td>L2</td><td>Inductor</td><td>3.3 micro henry</td></tr></tbody></table>

Arduino site also contains the following circuit diagram:

* [https://content.arduino.cc/assets/NANO33BLE\_V2.0\_sch.pdf](https://content.arduino.cc/assets/NANO33BLE_V2.0_sch.pdf)

Below is the same diagram in the form of a picture (with little bit improved readability):

<figure><img src="https://1791219135-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FifYnTDP7IFJCZallDj96%2Fuploads%2Fzbxt3Q3PUaJy0LlShSr8%2Fimage.png?alt=media&#x26;token=741fc2cf-6a76-43fc-aa53-4a77d14671cc" alt=""><figcaption></figcaption></figure>

Elements from this circuit diagram:

<table><thead><tr><th width="103.33333333333331">ID</th><th width="152">Type</th><th>Notes</th></tr></thead><tbody><tr><td>U1 A,B</td><td>NINA-B3X</td><td>Main CPU, Bluetooth 5.0 Module</td></tr><tr><td>U2</td><td>LSM9DS1</td><td>The 9-axis IMU (Accelerometer, Gyroscope, Magnetometer)</td></tr><tr><td>U3</td><td>MP34DT06JTR</td><td>Omnidirectional Digital Microphone</td></tr><tr><td>U4 A,B</td><td>  --</td><td>Crypto Auth (it is not clear what is that)</td></tr><tr><td>U5</td><td>APDS-9960</td><td>Proximity, Ambient Light, RGB and Gesture Sensor</td></tr><tr><td>LPS-1</td><td>LPS22</td><td>Pressure Sensor</td></tr><tr><td>IC1</td><td>MPM3610</td><td>Synchronous Step-Down Converter with Integrated Inductor</td></tr><tr><td>IC2</td><td>HTS221</td><td>Humidity and Temperature Sensor</td></tr></tbody></table>

As you can see, several ICs, mentioned on the circuit diagram are not installed on the board plus some of them may not even have pads on the PCB.

Most important takeaways from this diagram:

* Only the U1, U2 and IC1 are installed. Just these 3 ICs. Not any other
* The step down power convertor is MPM3610. I can read "3610" on the chip if looking closely.
* There is no inductor on the boards as it is integrated into the voltage regulator chip
* All LEDs are software driven. None of the LEDs are are driven by the hardware.

These notes are written in January 2023. It may happen that details described above will change.
