---
name: "iic"
section: "4"
platform: "linux"
package: "freebsd-manpages"
version: "6.0-5"
release: "Debian 4.0 (Etch)"
platforms: ["linux", "freebsd", "openbsd"]
url: "https://new.carta.tech/iic"
---

# iic(4)

I2C generic i/o device driver

## NAME

**iic** – I2C generic i/o device driver

## SYNOPSIS

**device iic**

## DESCRIPTION

The *iic* character device driver provides generic i/o to any [iicbus(4)](/iicbus/4.md) instance. In order to control I2C devices, use */dev/iic?* with the following ioctls:

| | |
| --- | --- |
| *Ioctl* | *Description* |
| **I2CSTART** | send start condition to the specified device (with 7-bit address) on the bus |
| **I2CSTOP** | send stop condition to the bus |
| **I2CRSTCARD** | reset the bus |

You may also use read/write routines, then I2C start/stop handshake is managed by the iicbus system.

## SEE ALSO

[iicbus(4)](/iicbus/4.md)

## HISTORY

The **iic** manual page first appeared in FreeBSD 3.0.

## AUTHORS

This manual page was written by Nicolas Souchu.