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 microcontrollers/microprocessors and the serial I2C-bus.  The PCF8584 provides
       both master and slave functions.  Communication with I2C-bus is carried 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.

Debian                                           August 6, 1998                                           PCF(4)