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lpbb(4)
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 lpbb manual page first appeared in FreeBSD 3.0.
AUTHORS
This manual page was written by Nicolas Souchu.
FreeBSD 5.4 October 25, 1998 FreeBSD 5.4
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