lpbb (4)

Leading comments

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 ot...

(The comments found at the beginning of the groff file "man4/lpbb.4freebsd".)

NAME

lpbb - parallel port I2C bit-banging interface

SYNOPSIS

device iicbus device iicbb

device lpbb device iic

DESCRIPTION

The lpbb driver supports the Philips official I2C parallel bit-banging interface.

                                         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    -------------------------------------------------------

SEE ALSO

iicbb(4), iicbus(4), ppbus(4)

HISTORY

The ifconfig manual page first appeared in Fx 3.0 .

AUTHORS

This manual page was written by An Nicolas Souchu .