iic - Inter IC (I2C) bus
iic* at gscsio?
I2C is a two-wire bus developed by Philips used for connecting integrated
circuits. It is commonly used for connecting devices such
temperature sensors, fan controllers, real-time clocks,
tuners, and other
types of integrated circuits.
The iic driver provides a uniform programming interface layer between I2C
master controllers and various I2C slave devices. Each I2C
attaches an iic framework; several slave devices can
then be attached
to the iic bus.
All I2C slave devices are uniquely identified by the address
on the bus.
The master accesses a particular slave device using its address. Device
addresses should be specified in the kernel configuration
file with the
System Management Bus (SMBus) protocol is also supported by
with the I2C commands.
National Semiconductor Geode SC1100 Super I/O
National Semiconductor LM75/LM77 temperature
gscsio(4), intro(4), lmtemp(4), iic(9)
The I2C framework first appeared in NetBSD 2.0. OpenBSD
added in OpenBSD 3.6.
The I2C framework was written by Steve C. Woodford and Jason
for NetBSD and then ported to OpenBSD by Alexander Yurchenko
OpenBSD 3.6 May 15, 2004
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