FreeBSD manual
download PDF document: pcf.4.pdf
PCF(4) FreeBSD 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
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.
FreeBSD 14.0-RELEASE-p6 August 6, 1998 FreeBSD 14.0-RELEASE-p6