SPI Pins for Nano 33 IoT board

Projects General Guidance
1

Hello Dude,

I'v Arduino Nano 33 IoT board and plan to communicate with SPI devices.
I've found the technical specification from official website. But the information is limited for SPI, i.e. SPI MOSI -> Pin 29 (D11) and SPI MISO -> Pin 30 (D12) and SPI SCK pin is not mentioned. Please check attached picture.

Since I cannot manage to find the pin-out or schematic of the board, I have difficulty to make connection for SPI.

Any suggestion is greatly appreciated.

pak

Arduino Nano 33 IoT_SPI Pins.jpg

2

SCK stands for "serial clock". On the product page for the Nano 33 IoT, it is identified as "SPI CLK".

You can find a pinout table for the Nano 33 IoT in the variant file:

The schematic has not been released for this board. However, I do have access to it (though not permission to release it). So if you have any specific questions about the board that the pinout table doesn't answer, I can try to answer them for you.

3

Thank for quick reply,

SCK stands for "serial clock". On the product page for the Nano 33 IoT, it is identified as "SPI CLK".

Are you mentioned about SPI connection between ATSAMD21 and ESP32 (Nina board)? Please refer to attached file. Where are these pins located on the Nano 33 IoT board?

But what I need is SPI communication between Nano 33 IoT board and SPI device like MCP3202. And I take a look at "variant.cpp", but I cannot manage to find the related SPI pin except SPI (Legacy ICSP) pins, where are they in Nano 33 IoT board? Please refer to attached file.

pak

Arduino Nano 33 IoT_SPI Pins_1.jpg
Arduino Nano 33 IoT_SPI Pins_1.jpg724×513 42.9 KB

Arduino Nano 33 IoT_SPI Pins_2.jpg
Arduino Nano 33 IoT_SPI Pins_2.jpg683×735 110 KB

4

the new Nanos have pin mapping similar to classic Nano. so SPI is on pins 10,11,12,13

5

Hi Juraj,

Thank for reply, it works. Now, I realize that why the name of the board comes from.