Datasheet > KS8842-32MQL

KS8842-32MQL

更新时间： 2022-11-24 21:51:24

品牌	Logo	应用领域
麦瑞 - MICREL		PC 以太网
页数	文件大小	规格书
1页	68K
描述
2-Port Ethernet Switch with Non-PCI Interface

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KS8842-32MQL 数据手册

KS8842-16MQL

KS8842-32MQL

Product Brief

www.micrel.com

2-Port Ethernet Switch

with Non-PCI Interface

Description

Benefits

The KS8842M is the industry’s first fully managed 2-port

switch with a non-PCI CPU interface. The KS8842 is a

proven, 4th generation, integrated Layer 2 switch that is

compliant to the IEEE 802.3u standard.

Offers all of the features of an integrated Layer 2

managed switch plus:

• Fully compliant to the IEEE 802.3u standard

• Repeater mode capabilities to allow for ‘cut-thru’ in

latency critical Industrial Ethernet or Embedded

Ethernet applications

• MAC filtering function to filter unicast packets

• Dynamic buffer memory scheme

The KS8842M can also be configured as a low-latency

repeater to allow for ‘cut thru’ in latency critical Embedded

or Industrial Ethernet applications. For industrial automa-

tion applications in the repeater mode, the KS8842M runs

in half-duplex mode regardless of the application.

– Essential for applications such as Video over IP

where image jitter is unacceptable

TheKS8842Moffersanextensivefeaturesetthatincludes

tag/port-based VLAN, QoS priority management, MAC

filtering function, MIB counters, and CPU control/data

interfaces to effectively address both current and emerg-

ing Fast Ethernet applications.

• 2-Port switch with flexible 8/16/32 bit generic host

processor interface

• Micrel LinkMD cable diagnostic capabilities to

determine cable length, diagnose faulty cables, and

determine distance to fault

The KS8842 contains two 10/100 transceivers with pat-

ented mixed-signal low-power technology, two media ac-

cess control (MAC) units and a direct memory access

(DMA) channel, a high-speed non-blocking switch fabric,

a dedicated 1K entry forwarding table, and an on-chip

frame buffer memory.

• HP Auto MDI-X crossover with disable and enable

option

• Industrial Temperature support: –40 C to +85 C

available from Q4

• Four priority queues to handle voice, video, data,

and control packets

Block Diagram

Applications

• Industrial applications for daisy chaining

1K Look-Up

Engine

multiple devices

HP Auto

MDI/MDI-X

10/100

T/TX

PHY 1

10/100

MAC 1

• Industrial control in latency critical

applications

• Port redundancy and port monitoring

• Security cameras

Queue

Management

HP Auto

MDI/MDI-X

10/100

T/TX

PHY 2

10/100

MAC 2

• VoIP phone and ATA adaptors

Buffer

Management

DMA

Channel

Non-PCI

CPU

Bus Interface Unit

Embedded

Processor Interface

Frame

Buffers

8/16/32 Bit

Generic Host Interface

MIB

Counters

Control

Registers

EEPROM

Interface

EEPROM I/F

P1 LED[3:0]

P2 LED[3:0]

LED

Drivers

Note: For an MII/RMII, I²C or SPI interface, use the KS8883ML.

LinkMD is a trademark of Micrel, Inc.

Micrel Semiconductor TEL: 1.408.944.0800 FAX: 1.408.474.1000 HTTP:// www.micrel.com

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