1998-10-28 00:51:40 +00:00
|
|
|
.\" Copyright (c) 1998, Nicolas Souchu
|
|
|
|
|
.\" All rights reserved.
|
|
|
|
|
.\"
|
|
|
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
|
|
|
.\" modification, are permitted provided that the following conditions
|
|
|
|
|
.\" are met:
|
|
|
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
|
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
|
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
|
|
|
.\"
|
|
|
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
|
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
|
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
|
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
|
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
|
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
|
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
|
|
|
.\" SUCH DAMAGE.
|
|
|
|
|
.\"
|
1999-08-28 00:22:10 +00:00
|
|
|
.\" $FreeBSD$
|
1998-10-28 00:51:40 +00:00
|
|
|
.\"
|
|
|
|
|
.Dd August 6, 1998
|
1999-09-04 12:56:28 +00:00
|
|
|
.Dt PCF 4 i386
|
2001-07-10 15:31:11 +00:00
|
|
|
.Os
|
1998-10-28 00:51:40 +00:00
|
|
|
.Sh NAME
|
|
|
|
|
.Nm pcf
|
2001-04-18 15:54:10 +00:00
|
|
|
.Nd Philips I2C bus controller
|
1998-10-28 00:51:40 +00:00
|
|
|
.Sh SYNOPSIS
|
2001-10-13 09:08:37 +00:00
|
|
|
.Cd "device pcf"
|
|
|
|
|
.Pp
|
|
|
|
|
In
|
|
|
|
|
.Pa /boot/device.hints :
|
|
|
|
|
.Cd hint.pcf.0.at="isa"
|
|
|
|
|
.Cd hint.pcf.0.port="0x320"
|
|
|
|
|
.Cd hint.pcf.0.irq="5"
|
1998-10-28 00:51:40 +00:00
|
|
|
.Pp
|
|
|
|
|
For one or more iicbus busses:
|
2000-01-23 17:00:18 +00:00
|
|
|
.Cd "device iicbus"
|
1998-10-28 00:51:40 +00:00
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
The
|
|
|
|
|
.Em pcf
|
|
|
|
|
driver provides support to the Philips PCF8584 I2C controller for the
|
|
|
|
|
.Xr iicbus 4
|
|
|
|
|
system.
|
|
|
|
|
.Pp
|
|
|
|
|
The PCF8584 is an integrated circuit designed in CMOS technology which serves
|
2001-07-14 19:41:16 +00:00
|
|
|
as an interface between most standard parallel-bus
|
2000-03-03 14:05:08 +00:00
|
|
|
microcontrollers/microprocessors and the serial I2C-bus.
|
2001-07-14 19:41:16 +00:00
|
|
|
The PCF8584
|
2000-03-03 14:05:08 +00:00
|
|
|
provides both master and slave functions.
|
|
|
|
|
Communication with I2C-bus is
|
|
|
|
|
carried out on a byte-wise basis using interrupt or polled handshake.
|
|
|
|
|
It
|
1998-10-28 00:51:40 +00:00
|
|
|
controls all the I2C-bus specific sequences, protocol, arbitration and timing.
|
|
|
|
|
The PCF8584 allows parallel-bus systems to communicate bidirectionally with
|
|
|
|
|
the I2C-bus.
|
|
|
|
|
.Sh SEE ALSO
|
|
|
|
|
.Xr iicbus 4
|
|
|
|
|
.Sh HISTORY
|
|
|
|
|
The
|
|
|
|
|
.Nm
|
|
|
|
|
manual page first appeared in
|
|
|
|
|
.Fx 3.0 .
|
1999-08-15 10:48:36 +00:00
|
|
|
.Sh AUTHORS
|
1998-10-28 00:51:40 +00:00
|
|
|
This
|
|
|
|
|
manual page was written by
|
|
|
|
|
.An Nicolas Souchu .
|
