KSZ8851-16MLLJ_10 Datasheet, PDF (1/90 Pages) Micrel Semiconductor – Single-Port Ethernet MAC Controller with 8-Bit or 16-Bit Non-PCI Interface

KSZ8851-16MLLJ
Single-Port Ethernet MAC Controller
with 8-Bit or 16-Bit Non-PCI Interface
(Extended Temperature Support)
General Description
The KSZ8851-16MLLJ is a single-port controller chip with
a non-PCI CPU interface and is available in 8-bit and 16-
bit bus designs with extended temperature support (-40°C
to +125°C). This datasheet describes the 48-pin LQFP
KSZ8851-16MLLJ for applications requiring high-
performance from single-port Ethernet Controller with 8-bit
or 16-bit generic processor interface. The KSZ8851-
16MLLJ offers the most cost-effective solution for adding
high-throughput Ethernet connectivity to traditional
embedded systems.
The KSZ8851-16MLLJ is a single-chip, mixed
analog/digital device offering Wake-on-LAN technology for
effectively addressing Fast Ethernet applications. It
consists of a Fast Ethernet MAC controller, an 8-bit or 16-
bit generic host processor interface and incorporates a
unique dynamic memory pointer with 4-byte buffer
boundary and a fully utilizable 18KB for both TX (allocated
6KB) and RX (allocated 12KB) directions in host buffer
interface.
The KSZ8851-16MLLJ is designed to be fully compliant
with the appropriate IEEE 802.3 standards. An extended
temperature-grade version of the KSZ8851-16MLLJ is
available (see “Ordering Information section).
LinkMD^®
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 KSZ8851-16MLLJ is designed using a low-power
CMOS process that features a single 3.3V power supply
with options for 1.8V, 2.5V or 3.3V VDD I/O. The device
includes an extensive feature set that offers management
information base (MIB) counters and CPU control/data
interfaces with single shared data bus timing.
The KSZ8851-16MLLJ includes unique cable diagnostics
feature called LinkMD^®. This feature determines the length
of the cabling plant and also ascertains if there is an open
or short condition in the cable. Accompanying software
enables the cable length and cable conditions to be
conveniently displayed. In addition, the KSZ8851-16MLLJ
supports Hewlett Packard (HP) Auto-MDIX thereby
eliminating the need to differentiate between straight or
crossover cables in applications.
Functional Diagram
Figure 1. KSZ8851-16MLLJ Functional Diagram
LinkMD is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
Month 2010
M9999-030210-1.0