SQ20P(4) BSD Programmer's Manual SQ20P(4)NAME
SQ20P - Physical layer (PHY) driver for Seeq 80220/80221/80223/80225 PHY-
ceiver
SYNOPSIS
sq20p* at de? phy ?
DESCRIPTION
The sq20p driver supports the Seeq/LSI logic 80220/80221/80223/80225 PHY-
ceiver device (PHY) for 10 and 100 Mb/s Ethernet. This device driver is
called upon by network device drivers; no direct administrative control
is provided.
The ifconfig(8) command in conjunction with the device driver making us-
ing of this drivers services provides an administrative interface that
allows various physical level parameters (such as duplex, speed, and
loopback) to be controlled.
The 80220/80221/80223/80225 supports NWay automatic speed and duplex ne-
gotiation as well as automatic speed detection for hubs that do not sup-
port the NWay FLP protocol (both methods are defined by the IEEE 802.3u
standard).
As of recently, Seeq has been purchased by LSI logic; so far, only the
chip labels have changed.
SEE ALSOifconfig(8), de(4)4th Berkeley Distribution January 20, 1999 1