---
name: "ismt"
section: "4"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["freebsd"]
url: "https://new.carta.tech/ismt"
---

# ismt(4)

Intel SMBus Message Transport (SMBus 2.0) driver

## NAME

**ismt** – Intel SMBus Message Transport (SMBus 2.0) driver

## SYNOPSIS

**device** **pci** **device** **smbus** **device** **smb** **device** **ismt**

## DESCRIPTION

This driver provides access to the SMBus 2.0 controller device contained in the Intel Atom S1200, C2000 and C3000 CPUs.

## SEE ALSO

[ichsmb(4)](/ichsmb/4.md), [smb(4)](/smb/4.md), [smbus(4)](/smbus/4.md)

## HISTORY

The **ismt** driver first appeared in FreeBSD 10.3.

## AUTHORS

Jim Harris ⟨*jimharris@FreeBSD.org*⟩