> For the complete documentation index, see [llms.txt](https://wiki.wisdpi.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.wisdpi.com/raspberry-pi/cm4-mini-itx-cluster/io-spec.md).

# IO Spec

### Back IO

![](/files/EcR1gUoAT0xkIaBvyBhJ)

### Onboard IO

<figure><img src="/files/0SpEcGJ91JLltQhtccEp" alt=""><figcaption></figcaption></figure>