KSZ8841_11 Datasheet, PDF (105/105 Pages) Micrel Semiconductor – Single-Port Ethernet MAC Controller with Non-PCI Interface

Micrel, Inc.
MDI-X Medium Dependent Interface Crossover
MIB
Management Information Base
MII
Media Independent Interface
NIC
Network Interface Card
NPVID
PLL
Non Port VLAN ID
Phase-Locked Loop
PME
QMU
Power Management Event
Queue Management Unit
SA
TDR
Source Address
Time Domain Reflectometry
UTP
Unshielded Twisted Pair
VLAN Virtual Local Area Network
KSZ8841-16/32 MQL/MVL/MBL
An Ethernet port connection that allows networked end stations (i.e.,
PCs or workstations) to connect to each other using a null-modem, or
crossover, cable. For 10/100 full-duplex networks, an end point (such
as a computer) and a switch are wired so that each transmitter
connects to the far end receiver. When connecting two computers
together, a cable that crosses the TX and RX is required to do this.
With auto MDI-X, the PHY senses the correct TX and RX roles,
eliminating any cable confusion.
The MIB comprises the management portion of network devices. This
can include things like monitoring traffic levels and faults (statistical),
and can also change operating parameters in network nodes (static
forwarding addresses).
The MII accesses PHY registers as defined in the IEEE 802.3
specification.
An expansion board inserted into a computer to allow it to be
connected to a network. Most NICs are designed for a particular type
of network, protocol, and media, although some can serve multiple
networks.
The Port VLAN ID value is used as a VLAN reference.
An electronic circuit that controls an oscillator so that it maintains a
constant phase angle (i.e., lock) on the frequency of an input, or
reference, signal. A PLL ensures that a communication signal is
locked on a specific frequency and can also be used to generate,
modulate, and demodulate a signal and divide a frequency.
An occurrence that affects the directing of power to different
components of a system.
Manages packet traffic between MAC/PHY interface and the system
host. The QMU has built-in packet memories for receive and transmit
functions called TXQ (Transmit Queue) and RXQ (Receive Queue).
The address from which information has been sent.
TDR is used to pinpoint flaws and problems in underground and aerial
wire, cabling, and fiber optics. They send a signal down the conductor
and measure the time it takes for the signal -- or part of the signal -- to
return.
Commonly a cable containing 4 twisted pairs of wires. The wires are
twisted in such a manner as to cancel electrical interference
generated in each wire, therefore shielding is not required.
A configuration of computers that acts as if all computers are
connected by the same physical network but which may be located
virtually anywhere.
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL [phone] FAX [phone] WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use.
Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into
the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s
use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
© 2005 Micrel, Incorporated.
October 2007
105
M9999-102207-1.6