83 lines
3.4 KiB
Groff
83 lines
3.4 KiB
Groff
.\" Copyright (c) 1998, Nicolas Souchu
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd October 25, 1998
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.Dt LPBB 4
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.Os FreeBSD
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.Sh NAME
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.Nm lpbb
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.Nd
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Parallel port I2C bit-banging interface
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.Sh SYNOPSIS
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.Cd "device iicbus"
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.Cd "device iicbb"
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.Pp
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.Cd "device lpbb"
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.Cd "device iic"
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.Sh DESCRIPTION
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The
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.Em lpbb
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driver supports the Philips official I2C parallel bit-banging interface.
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.Pp
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.Bd -literal
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LS05 pin 14 (Vcc) o -------
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| | |
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+--+--+---------------------+--+--+------------+------+-o 1 |
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| | | | | | ===.1uF | +5V |
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-------- [R][R][R] 3x10K 3x10K [R][R][R] LS05 | | |
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| | | | | | | | pin 7 o-+------+-o 2 |
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| 12 o-+--+ | | 3|\\ 4 | | | (Gnd) | GND |
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| 17 o-+-----|--|----| >o-------------+--|--|--------------+ | |
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| | | | |/ 8 /|9 | | 10 /|11 +----+-o 3 |
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| 15 o-+-----+--|--------------o< |------+--|------o< |----+ | SCL |
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| | | 1|\\ 2 \\| | \\| | |
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| 9 o-+--------|----| >o-------------------+--------------+----+-o 4 |
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| | | |/ 6 /|5 | | SDA |
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| 11 o-+--------+----------------------------------o< |----+ -------
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| 10 o-+-+ \\| 4-pin
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| 13 o-+-+--oGND Connector
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| 25 o-+-+ ------------------ Part List --------------------------
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-------- | 1 - .1 uF capacitor | 6 - 10K 5% resistors |
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25-pin male D | 1 - 4-pin connector | 1 - 25-pin male D connector |
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connector to PC | 1 - 74LS05 open collector hex inverter |
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printer port -------------------------------------------------------
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.Ed
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.Pp
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.Sh SEE ALSO
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.Xr iicbb 4 ,
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.Xr iicbus 4 ,
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.Xr ppbus 4
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.Sh HISTORY
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The
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.Nm
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manual page first appeared in
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.Fx 3.0 .
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.Sh AUTHORS
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This
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manual page was written by
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.An Nicolas Souchu .
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