---
name: "uchcom"
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/uchcom"
---

# uchcom(4)

WinChipHead CH9102/343/341/340 based USB serial adapter

## NAME

**uchcom** – WinChipHead CH9102/343/341/340 based USB serial adapter

## SYNOPSIS

**uchcom\* at uhub?** **ucom\* at uchcom?**

## DESCRIPTION

The **uchcom** driver supports WinChipHead CH9102/343/341/340 serial devices.

The CH341/340 devices only support a variety of baud rates up to 921600. CH9102/343 devices support any baud rate up to 6 Mbps.

## SEE ALSO

[tty(4)](/tty/4.md), [ucom(4)](/ucom/4.md), uhub(4), [usb(4)](/usb/4.md)

## HISTORY

The **uchcom** device driver first appeared in OpenBSD 4.3.

## AUTHORS

The **uchcom** driver was written by Takuya SHIOZAKI ⟨*tshiozak@netbsd.org*⟩ and ported to OpenBSD by Jonathan Gray ⟨*jsg@openbsd.org*⟩.