KSZ8851MQL/MLL/SNL
Product Brief
LinkMD is a registered trademark of Micrel, Inc.
Micrel, Inc. TEL: +1 408.944.0800 FAX: + 1 408.474.1000 http://www.micrel.com
Single Port MAC/PHY Controller with Non PCI Interface
Description
The KSZ8851 is a single-port embedded controller chip
with 8/16/32-bit and SPI host interfaces. The device is pin
compatible with Micrel’s KSZ8841 and KSZ8842 product
families.
The KSZ8851 integrates a Fast Ethernet MAC/PHY with
an 8/16/32-bit generic host processor interface and SPI
interface. The device has 18KB of internal buffer memory
shared between the RXQ and TXQ. The buffer memory on
the receive queue is 12KB while the buffer memory for the
transmit queue is 6KB.
The KSZ8851 is designed with flexibility in mind. The
device is designed using a low-power CMOS process
which features programmable IO options of 1.8/2.5/3.3V.
The KSZ8851 supports cable diagnostics feature LinkMD®
and Hewlett Packard (HP) Auto-MDIX. The LinkMD®
feature determines the length of the cabling plant and also
ascertains if there is an open or short condition in the
cable. Hewlett Packard (HP) Auto-MDIX features
eliminates the need to differentiate between straight or
crossover cables.
The KSZ8851 is designed to be fully compliant with the
IEEE 802.3 standards. The KSZ8851 is also available in
industrial grade version.
All datasheets and support documentation can be found
on Micrel’s web site at: www.micrel.com.
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Block Diagram
KSZ8851 Block Diagram
Micrel, Inc. TEL: +1 408.944.0800 FAX: + 1 408.474.1000 http://www.micrel.com
M9999-070308
Features
• Single chip 10BASE-T/100BASE-TX Ethernet controller with
IEEE802.3u support
• Supports IEEE 802.3x full-duplex flow contr ol an d half-
duplex backpressure collision flow control
• Single bus timing for register and data acces s es
• Supports burst data transfers
• Flexible 8-bit, 16-bit, 32-bit generic host processor interfaces
and SPI host interface
• Supports both Big- and Little-Endian processors
• Efficient architecture design with confi gurable host interrupt
schemes to minimize host CPU overhead and utilization
• 18KB internal memory for RX/TX FIFO buffers
– 12KB RXQ and 6KB TXQ
• Ability to transmit and receive frames up to 2000 bytes
• Supports TCP/UDP/ICMP/IPv4/IPv6 32-bit CRC checksum
generation and checkin g
• Powerful and flexible address filtering sch eme
• Support for loop back mode
• Wake-on-LAN functionality
– Incorporates Magic Packet™, network link state, and
wake-up frame technology
• Enhanced power managemen t feature with energy detect
mode and power-do wn mode to ensure low-power
dissipation during device id le periods
• HP Auto MDI-X™ crossover with disable/enable option
• Micrel LinkMD® cable diagnostic capabilities to determine
cable length, diagnose faulty cables, and determine distance
to fault
• Comprehensive LED indicator support for link, activity,
full/half duplex, and 10/100 speed (4 LE Ds)
– User programmable
• Low-power CMOS design
• Programmable IO Options: 3.3V/2.5/1.8V
• Commercial temperature range: 0oC to +70oC
• Industrial temperature range: –40oC to +85oC
• Available in 128-pin PQFP (8/16/32 Generic Bus), 48-pin
LQFP (8/16 Generic Bus) and 32-pin QFN (SPI)
Applications
• Video Distribution Systems
• High-end Cable, Satellite, an d IP set-top boxes
• Video over IP (VoIP)
• Analog Telephone Adapters (ATA)
• Industrial Control in Latency Critical Applications
• Motion Control
• Industrial Control Sensor Devices (Temperature, Pressure,
Levels, and Valves)
• Security and Surveillance Cameras
Corporate Sales Offices
Location Address Telephone Fax
Corporate HQ 2180 Fortune Dr. San Jose, CA 95131 USA (408) 944-0800 (408) 474-1000
Western USA 2180 Fortune Dr. San Jose, CA 95131 USA (408) 944-0800 (408) 474-1000
Central USA 2425 N. Central Expressway, Suite 351 Richardson, TX 57080 USA (972) 393-2533 (408) 474-1210
Eastern USA 93 Branch St. Medford, NJ 08 055 USA (609) 654-0078 (609) 654-0989
Latin America 2425 N. Central Expressway, Suite 351 Richardson, TX 57080 USA (972) 393-2533 (408) 474-1210
China Rm 601, Bldg., Int’l Chamber of Commerce
Mansion, Fuhua Rd., Futian District Shenzhen, P.R. China +86-755-8302-7618 +86-755-8302-7637
Japan Queen’s Tower A 14F, 2-3-1, Minato Mirai, Nishi-
Ku, Yokoha ma-Shi Kanagawa 220-6014, Japan +81-45-224-6616 +81-45-224-6716
Korea 8F AnnJay Tower Bldg., 718-2, Yeoksam-Dong Kangnam-Ku, Seoul 135-080
Korea 82 (2) 538-2380 82 (2) 538-2381
Singapore/India 300 Beach Rd., #10-07 Concourse Singapor e 199555 +65-6291-1318 +65-6291-1332
Taiwan 4F, No. 43 La ne 188, Rueiguang Rd., Neihu District Taipei, Taiwan, R.O.C. +866 (2) 8751-0600 +866 (2) 8751-0746
France/Southern
Europe Les Lauren tides
Immeuble Ontario, 3 avenue du Quebec 91140 Villebon sur Yvette,
France +33 (0) 1.6092.4190 +33 (0) 1.6092.4189
UK/EMEA 1st Floor, 3 Lockside Place, Mill Lane, Newbury,
Berks United Kingdom RG14 5QS +44 (1635) 524455` +44 (1635) 524466
Sweden/Nordic Lundagatan 11 6tr SE-171 63 Solna Sweden +46 (8) 470-5950 +46 (8) 470-5950
