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.\" 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.
.\"
.\" $FreeBSD$
.\"
.Dd October 25, 1998
.Dt LPBB 4
.Os
.Sh NAME
.Nm lpbb
.Nd parallel port I2C bit-banging interface
.Sh SYNOPSIS
.Cd "device iicbus"
.Cd "device iicbb"
.Pp
.Cd "device lpbb"
.Cd "device iic"
.Sh DESCRIPTION
The
.Em lpbb
driver supports the Philips official I2C parallel bit-banging interface.
.Pp
.Bd -literal
LS05 pin 14 (Vcc) o -------
| | |
+--+--+---------------------+--+--+------------+------+-o 1 |
| | | | | | ===.1uF | +5V |
-------- [R][R][R] 3x10K 3x10K [R][R][R] LS05 | | |
| | | | | | | | pin 7 o-+------+-o 2 |
| 12 o-+--+ | | 3|\\ 4 | | | (Gnd) | GND |
| 17 o-+-----|--|----| >o-------------+--|--|--------------+ | |
| | | | |/ 8 /|9 | | 10 /|11 +----+-o 3 |
| 15 o-+-----+--|--------------o< |------+--|------o< |----+ | SCL |
| | | 1|\\ 2 \\| | \\| | |
| 9 o-+--------|----| >o-------------------+--------------+----+-o 4 |
| | | |/ 6 /|5 | | SDA |
| 11 o-+--------+----------------------------------o< |----+ -------
| 10 o-+-+ \\| 4-pin
| 13 o-+-+--oGND Connector
| 25 o-+-+ ------------------ Part List --------------------------
-------- | 1 - .1 uF capacitor | 6 - 10K 5% resistors |
25-pin male D | 1 - 4-pin connector | 1 - 25-pin male D connector |
connector to PC | 1 - 74LS05 open collector hex inverter |
printer port -------------------------------------------------------
.Ed
.Sh SEE ALSO
.Xr iicbb 4 ,
.Xr iicbus 4 ,
.Xr ppbus 4
.Sh HISTORY
The
.Nm
manual page first appeared in
.Fx 3.0 .
.Sh AUTHORS
This
manual page was written by
.An Nicolas Souchu .
|
