1 .\" Copyright (c) 1998, Nicolas Souchu
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25 .\" $FreeBSD: src/share/man/man4/lpbb.4,v 1.8.2.3 2001/08/17 13:08:38 ru Exp $
26 .\" $DragonFly: src/share/man/man4/lpbb.4,v 1.3 2008/05/02 02:05:05 swildner Exp $
33 .Nd parallel port I2C bit-banging interface
43 driver supports the Philips official I2C parallel bit-banging interface.
46 LS05 pin 14 (Vcc) o -------
48 +--+--+---------------------+--+--+------------+------+-o 1 |
49 | | | | | | ===.1uF | +5V |
50 -------- [R][R][R] 3x10K 3x10K [R][R][R] LS05 | | |
51 | | | | | | | | pin 7 o-+------+-o 2 |
52 | 12 o-+--+ | | 3|\\ 4 | | | (Gnd) | GND |
53 | 17 o-+-----|--|----| >o-------------+--|--|--------------+ | |
54 | | | | |/ 8 /|9 | | 10 /|11 +----+-o 3 |
55 | 15 o-+-----+--|--------------o< |------+--|------o< |----+ | SCL |
56 | | | 1|\\ 2 \\| | \\| | |
57 | 9 o-+--------|----| >o-------------------+--------------+----+-o 4 |
58 | | | |/ 6 /|5 | | SDA |
59 | 11 o-+--------+----------------------------------o< |----+ -------
61 | 13 o-+-+--oGND Connector
62 | 25 o-+-+ ------------------ Part List --------------------------
63 -------- | 1 - .1 uF capacitor | 6 - 10K 5% resistors |
64 25-pin male D | 1 - 4-pin connector | 1 - 25-pin male D connector |
65 connector to PC | 1 - 74LS05 open collector hex inverter |
66 printer port -------------------------------------------------------
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