> For the complete documentation index, see [llms.txt](https://sdk.twelite.info/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sdk.twelite.info/en/hw-api-ref.md).

# HW API reference

Many of the hardware handling procedures use the procedures described in the semiconductor peripheral API manual.

In the TWELITE SDK, we have compiled a library of typical peripheral API procedures for commonly used UARTs and other hardware.

{% hint style="info" %}
Not all hardware is libraryable. It is used in a mixed way with the peripheral API.
{% endhint %}


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