pcf(4) [netbsd man page]

PCF(4)							   BSD Kernel Interfaces Manual 						    PCF(4)

NAME

     pcf -- Philips I2C bus controller

SYNOPSIS

     device pcf

     In /boot/device.hints:
     hint.pcf.0.at="isa"
     hint.pcf.0.port="0x320"
     hint.pcf.0.irq="5"

     For one or more iicbus busses:
     device iicbus

DESCRIPTION

     The pcf driver provides support to the Philips PCF8584 I2C controller for the iicbus(4) system.

     The PCF8584 is an integrated circuit designed in CMOS technology which serves as an interface between most standard parallel-bus microcon-
     trollers/microprocessors and the serial I2C-bus.  The PCF8584 provides both master and slave functions.  Communication with I2C-bus is car-
     ried out on a byte-wise basis using interrupt or polled handshake.  It controls all the I2C-bus specific sequences, protocol, arbitration and
     timing.  The PCF8584 allows parallel-bus systems to communicate bidirectionally with the I2C-bus.

SEE ALSO

     iicbus(4)

HISTORY

     The pcf manual page first appeared in FreeBSD 3.0.

AUTHORS

     This manual page was written by Nicolas Souchu.

BSD
								  August 6, 1998							       BSD

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