ksz8851snltr Micrel Semiconductor, ksz8851snltr Datasheet

ksz8851snltr

Manufacturer Part Number

ksz8851snltr

Description

Single-port Ethernet Controller With Spi Interface

Manufacturer

Micrel Semiconductor

Datasheet

1.KSZ8851SNLTR.pdf (80 pages)

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General Description

The KSZ8851SNL is a single-chip Fast Ethernet controller

consisting of a 10/100 physical layer transceiver (PHY), a

MAC, and a Serial Peripheral Interface (SPI). The

KSZ8851SNL is designed to enable an Ethernet network

connectivity with any host micro-controller equipped with

SPI interface. The KSZ8851SNL offers the most cost-

effective solution for adding high-throughput Ethernet link

to traditional embedded systems with SPI interface.

The KSZ8851SNL 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, SPI 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 KSZ8851SNL is designed to be fully compliant with

the appropriate IEEE 802.3 standards. An industrial

temperature-grade version of the KSZ8851SNL, the

KSZ8851SNLI is also available (see “Ordering Information”

section).

Functional Diagram

LinkMD is a registered trademark of Micrel, Inc.

Magic Packet is a trademark of Advanced Micro Devices, Inc.

MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.

February 2009

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

Figure 1. KSZ8851SNL/SNLI Functional Diagram

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 KSZ8851SNL 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 a fast SPI interface

with clock speed up to 50MHz.

The KSZ8851SNL includes unique cable diagnostics

feature called LinkMD

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 KSZ8851SNL

supports Hewlett Packard (HP) Auto-MDIX thereby

eliminating the need to differentiate between straight or

crossover cables in applications.

408

) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

Product names used in this datasheet are for identification purposes

only and may be trademarks of their respective companies.

Single-Port Ethernet Controller

KSZ8851SNL/SNLI

with SPI Interface

. This feature determines the length

Rev. 1.1

M9999-021309-1.1

LinkMD

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