PageRenderTime 22ms CodeModel.GetById 15ms app.highlight 2ms RepoModel.GetById 1ms app.codeStats 0ms

/share/man/man4/pcf.4

https://bitbucket.org/freebsd/freebsd-head/
Forth | 72 lines | 72 code | 0 blank | 0 comment | 1 complexity | fb2308f5a9d052514e755fe527b19bb0 MD5 | raw file
 1.\" Copyright (c) 1998, Nicolas Souchu
 2.\" All rights reserved.
 3.\"
 4.\" Redistribution and use in source and binary forms, with or without
 5.\" modification, are permitted provided that the following conditions
 6.\" are met:
 7.\" 1. Redistributions of source code must retain the above copyright
 8.\"    notice, this list of conditions and the following disclaimer.
 9.\" 2. Redistributions in binary form must reproduce the above copyright
10.\"    notice, this list of conditions and the following disclaimer in the
11.\"    documentation and/or other materials provided with the distribution.
12.\"
13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23.\" SUCH DAMAGE.
24.\"
25.\" $FreeBSD$
26.\"
27.Dd August 6, 1998
28.Dt PCF 4
29.Os
30.Sh NAME
31.Nm pcf
32.Nd Philips I2C bus controller
33.Sh SYNOPSIS
34.Cd "device pcf"
35.Pp
36In
37.Pa /boot/device.hints :
38.Cd hint.pcf.0.at="isa"
39.Cd hint.pcf.0.port="0x320"
40.Cd hint.pcf.0.irq="5"
41.Pp
42For one or more iicbus busses:
43.Cd "device iicbus"
44.Sh DESCRIPTION
45The
46.Em pcf
47driver provides support to the Philips PCF8584 I2C controller for the
48.Xr iicbus 4
49system.
50.Pp
51The PCF8584 is an integrated circuit designed in CMOS technology which serves
52as an interface between most standard parallel-bus
53microcontrollers/microprocessors and the serial I2C-bus.
54The PCF8584
55provides both master and slave functions.
56Communication with I2C-bus is
57carried out on a byte-wise basis using interrupt or polled handshake.
58It
59controls all the I2C-bus specific sequences, protocol, arbitration and timing.
60The PCF8584 allows parallel-bus systems to communicate bidirectionally with
61the I2C-bus.
62.Sh SEE ALSO
63.Xr iicbus 4
64.Sh HISTORY
65The
66.Nm
67manual page first appeared in
68.Fx 3.0 .
69.Sh AUTHORS
70This
71manual page was written by
72.An Nicolas Souchu .