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

# ytphy(4)

MotorComm YT8511 10/100/1Gb Ethernet PHY

## NAME

**ytphy** – MotorComm YT8511 10/100/1Gb Ethernet PHY

## SYNOPSIS

**ytphy\* at mii?**

## DESCRIPTION

The **ytphy** driver supports the MotorComm YT8511 10/100/1Gb Ethernet PHY.

## SEE ALSO

[ifmedia(4)](/ifmedia/4.md), [intro(4)](/intro/4.md), [mii(4)](/mii/4.md), [ifconfig(8)](/ifconfig/8.md)

## HISTORY

The **ytphy** device driver first appeared in OpenBSD 7.3.

## AUTHORS

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