www.micrel.com
KSZ8841-16MQL
KSZ8841-32MQL
Product Brief
Single-Port Ethernet MAC
Controller with Non-PCI Interface
Description
The KSZ8841-series single-port chip includes PCI and
non-PCI CPU interfaces, and are available in 8/16-bit
and 32-bit bus designs.
The KSZ8841-16MQL (or -32MQL) is a single chip, mixed
analog/digital device offering Wake-on-LAN technology for
effectively addressing Fast Ethernet applications. It con-
sists of a Fast Ethernet MAC controller, an 8-bit, 16-bit, and
32-bit generic host processor interface and incorporates
a unique dynamic, fully utilizable 8KB buffer memory for
both TX and RX directions in host buffer interface.
The KSZ8841-16MQL (or -32MQL) is designed to be fully
compliant with the appropriate IEEE 802.3 standards.
Physical signal transmission and reception are enhanced
through the use of analog circuitry, making the design
more ef鏗乧ient and allowing for lower power consumption.
The KSZ8841M is designed using a low-power CMOS
process that features a single 3.3V power supply with
5V tolerant I/O. It has an extensive feature set that offers
management information base (MIB) counters and CPU
control/data interfaces.
The KSZ8841M includes a unique cable diagnostic
feature called LinkMD
廬
. This feature determines the
length of the cabling plant and also ascertains if there
is an open or short condition in the cable. A companying
software enables the cable length and cable conditions
to be conveniently displayed. In addition, the KSZ8841M
supports Hewlett Packard (HP) Auto-MDIX thereby
eliminating the need to differentiate between straight
or crossover cables in applications.
Industrial temperature support (-40擄C to +85擄C) is also
provided with the KSZ8841-16MVLI.
For additional information, contact your local Micrel Field
Application Engineer or salesperson.
LinkMD is a registered trademark of Micrel, Inc.
Magic Packet is a trademark of Advanced Micro Devices, Inc.
Product names used in this datasheet are for identi鏗乧ation purposes only and
may be trademarks of their respective companies.
Block Diagram
P1 HP Auto
MDI/MDI-X
10/100
Base-T/TX
PHY
Host MAC
Embedded Processor
Interface
8, 16, or 32-bit
Generic Host
Interface
Non-PCI
CPU
Bus
Interface
Unit
QMU
DMA
Channel
RXQ
4KB
TXQ
4KB
Control
Registers
MIB
Counters
P1 LED[3:0]
EEPROM I/F
LED
Driver
EEPROM
Interface
KSZ8841M Functional Diagram
Micrel, Inc.
TEL:
1.408.944.0800
FAX:
1.408.474.1000
HTTP://
www.micrel.com
MICREL
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