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.