freebsd-skq/share/man/man4/lpbb.4
1999-08-28 00:22:10 +00:00

83 lines
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.\" Copyright (c) 1998, Nicolas Souchu
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.\" $FreeBSD$
.\"
.Dd October 25, 1998
.Dt LPBB 4
.Os FreeBSD
.Sh NAME
.Nm lpbb
.Nd
Parallel port I2C bit-banging interface
.Sh SYNOPSIS
.Cd "controller iicbus"
.Cd "controller iicbb0"
.Pp
.Cd "device lpbb0 at ppbus?"
.Cd "device iic0 at iicbus?"
.Sh DESCRIPTION
The
.Em lpbb
driver supports the Philips official I2C parallel bit-banging interface.
.Pp
.Bd -literal
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 -------------------------------------------------------
.Ed
.Pp
.Sh SEE ALSO
.Xr iicbb 4 ,
.Xr iicbus 4 ,
.Xr ppbus 4
.Sh HISTORY
The
.Nm
manual page first appeared in
.Fx 3.0 .
.Sh AUTHORS
This
manual page was written by
.An Nicolas Souchu .