01-30-2015
1uF looks rather large to me, I wonder if 0.1 would work.
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LPBB(4) BSD Kernel Interfaces Manual 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.
BSD
October 25, 1998 BSD