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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

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY | AUTHORS

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=lpbb&sektion=4&manpath=FreeBSD+12.1-RELEASE+and+Ports>

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