OpenBSD-4.6/share/man/man4/gscsio.4

.\"	$OpenBSD: gscsio.4,v 1.5 2007/05/31 19:19:50 jmc Exp $
.\"
.\" Copyright (c) 2004 Alexander Yurchenko <grange@openbsd.org>
.\"
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.Dd $Mdocdate: May 31 2007 $
.Dt GSCSIO 4
.Os
.Sh NAME
.Nm gscsio
.Nd National Semiconductor Geode SC1100 I2C controller
.Sh SYNOPSIS
.Cd "gscsio* at isa?"
.Cd "iic* at gscsio?"
.Sh DESCRIPTION
The
.Nm
driver provides support for the National Semiconductor Geode SC1100
System-on-Chip Super I/O module.
The Super I/O (SIO) module incorporates one serial port, an infrared
communication port, two ACCESS.bus interface (ACB) ports, system wakeup
control (SWC), and a real-time clock (RTC).
Only the ACCESS.bus interface is currently supported.
.Pp
ACB is a two-wire synchronous serial interface compatible with the
Philips'
.Tn I2C
bus, and can be accessed through the
.Xr iic 4
framework.
The
.Nm
driver
programs the ACB port to work with a standard
.Tn I2C
frequency 100kHz.
.Sh SEE ALSO
.Xr iic 4 ,
.Xr intro 4 ,
.Xr isa 4
.Sh HISTORY
The
.Nm
driver first appeared in
.Ox 3.6 .
.Sh AUTHORS
The
.Nm
driver was written by
.An Alexander Yurchenko Aq grange@openbsd.org .