pcf man page on FreeBSD

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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 carried
     out on a byte-wise basis using interrupt or polled handshake.  It con‐
     trols all the I2C-bus specific sequences, protocol, arbitration and tim‐
     ing.  The PCF8584 allows parallel-bus systems to communicate bidirection‐
     ally 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
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