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$FreeBSD$
.Dd October 25, 1998 .Dt LPBB 4 .Os .Sh NAME .Nm lpbb .Nd parallel port I2C bit-banging interface .Sh SYNOPSIS .Cd "device iicbus" .Cd "device iicbb"
p .Cd "device lpbb" .Cd "device iic" .Sh DESCRIPTION The .Em lpbb driver supports the Philips official I2C parallel bit-banging interface. d -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 .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 .