KSZ8841-PMQL
Single-Port Ethernet MAC Controller
with PCI Interface
Rev.1.5
General Description
The KSZ8841-series single-port chip includes PCI and
non-PCI CPU interfaces. This datasheet describes the
KSZ8841-PMQL with PCI CPU interface chips. For
information on the KSZ8841 non-PCI CPU interface
chips, refer to the KSZ8841-MQL datasheet.
The KSZ8841-PMQL is a single port Fast Ethernet MAC
chip with a 32-bit/33MHz PCI processor interface.
Designed to be fully compliant with the IEEE 802.3u
standard, the KSZ8841-PMQL is also available in an
industrial temperature-grade version of the KSZ8841-
PMQL, the KSZ8841-PMQLI. (See Ordering Information).
Physical signal transmission and reception are enhanced
through the use of analog circuitry, making the design
more efficient and allowing for lower power consumption.
The KSZ8841-PMQL is designed using a low-power
CMOS process that features a single 3.3V power supply
with 5V tolerant I/O.
LinkMD
®
The KSZ8841-PMQL is a mixed signal analog/digital
device offering Wake-on-LAN technology. Its extensive
feature set includes management information base (MIB)
counters and CPU control/data interfaces.
The KSZ8841-PMQL includes a unique cable diagnostics
feature called LinkMD
®
. This feature calculates the length
of the cabling plant and determines if there is an
open/short condition in the cable. Accompanying
software allows the cable length and cable conditions to
be conveniently displayed. In addition, the KSZ8841-
PMQL supports Hewlett Packard (HP) Auto-MDIX
thereby eliminating the need to differentiate between
straight or crossover cables in applications.
Datasheets and support documentation can be found on
Micrel’s web site at:
www.micrel.com.
Functional Diagram
Figure 1. KSZ8841-PMQL Function Diagram
LinkMD is a registered trademark of Micrel, Inc
Magic Packet is a trademark of Advanced Micro Devices, Inc.
Product/Application names used in this datasheet are for identification purposes only and may be trademarks of their respective companies.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
October 2007
M9999-100407-1.5
MICREL [ MICREL SEMICONDUCTOR ]
