---
name: "iicmux"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["freebsd", "openbsd"]
url: "https://new.carta.tech/iicmux"
---

# iicmux(4)

I2C mux

## NAME

**iicmux** – I2C mux

## SYNOPSIS

**iicmux\* at iic?** **iic\* at pcamux?**

## DESCRIPTION

The **iicmux** driver provides support for I2C bus multiplexers that use SoC pin multiplexing to route the I2C signals.

## SEE ALSO

[iic(4)](/iic/4.md), [intro(4)](/intro/4.md)

## HISTORY

The **iicmux** driver first appeared in OpenBSD 7.1.

## AUTHORS

The **iicmux** driver was written by Mark Kettenis ⟨*kettenis@openbsd.org*⟩.