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KSZ8873RLLI: 产品描述Integrated 3-Port 10/100 Managed Switch with PHYs; 文件大小684KB，共103页; 制造商Micrel ( Microchip ); 官网地址https://www.microchip.com

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KSZ8873RLLI概述

Integrated 3-Port 10/100 Managed Switch with PHYs

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KSZ8873MLL/FLL/RLL

Integrated 3-Port 10/100 Managed

Switch with PHYs

Rev. 1.2

General Description

The KSZ8873MLL/FLL/RLL are highly integrated 3-port

switch on a chip ICs in industry’s smallest footprint. They

are designed to enable a new generation of low port

count, cost-sensitive and power efficient 10/100Mbps

switch systems. Low power consumption, advanced

power management and sophisticated QoS features

(e.g., IPv6 priority classification support) make these

devices ideal for IPTV, IP-STB, VoIP, automotive and

industrial applications.

The KSZ8873 family is designed to support the GREEN

requirement in today’s switch systems. Advanced power

management schemes include hardware power down,

software power down, per port power down and the

energy detect mode that shuts downs the transceiver

when a port is idle.

KSZ8873MLL/FLL/RLL also offer a by-pass mode, which

enables system-level power saving. In this mode, the

processor connected to the switch through the MII

interface can be shut down without impacting the normal

switch operation.

__________________________________________________________________________________________________________

The configurations provided by the KSZ8873 family

enables the flexibility to meet requirements of different

applications:

•

KSZ8873MLL: Two 10/100BASE-T/TX transceivers

and one MII interface.

KSZ8873RLL: Two 10/100BASE-T/TX transceivers

and one RMII interface.

KSZ8873FLL: Two 100BASE-FX transceivers and

one MII interface.

The device is available in RoHS-compliant 64-pin LQFP

package. Industrial-grade and Automotive-grade are

also available.

The datasheets and supporting documents can be found

at Micrel’s web site at: www.micrel.com.

Functional Diagram

LinkMD is a registered trademark of Micrel, Inc

Product names used in this datasheet are for identification purposes only and may be trademarks of their respective companies.

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

408

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

September 2009

M9999-092309-1.2

Micrel, Inc.

KSZ8873MLL/FLL/RLL

Contents

Pin Description and I/O Assignment ................................................................................................................................. 11

Pin Configuration ................................................................................................................................................................ 16

Functional Description ....................................................................................................................................................... 17

Functional Overview: Physical Layer Transceiver .......................................................................................................... 17

100BASE-TX Transmit ..................................................................................................................................................... 17

100BASE-TX Receive ...................................................................................................................................................... 17

PLL Clock Synthesizer...................................................................................................................................................... 17

Scrambler/De-scrambler (100BASE-TX Only) ................................................................................................................. 17

100BASE-FX Operation.................................................................................................................................................... 17

100BASE-FX Signal Detection ......................................................................................................................................... 18

100BASE-FX Far-End Fault ............................................................................................................................................. 18

10BASE-T Transmit.......................................................................................................................................................... 18

10BASE-T Receive........................................................................................................................................................... 18

MDI/MDI-X Auto Crossover .............................................................................................................................................. 18

Straight Cable ............................................................................................................................................................ 19

Crossover Cable ........................................................................................................................................................ 20

Auto-Negotiation ............................................................................................................................................................... 21

LinkMD Cable Diagnostics.............................................................................................................................................. 22

Access ....................................................................................................................................................................... 22

Usage......................................................................................................................................................................... 22

Functional Overview: Power Management....................................................................................................................... 22

Normal Operation Mode..................................................................................................................................................... 23

Energy Detect Mode .......................................................................................................................................................... 23

Soft Power Down Mode ..................................................................................................................................................... 23

Power Saving Mode.......................................................................................................................................................... 23

Port based Power Down Mode ......................................................................................................................................... 23

Functional Overview: MAC and Switch ............................................................................................................................ 24

Address Lookup................................................................................................................................................................ 24

Learning ............................................................................................................................................................................ 24

Migration ........................................................................................................................................................................... 24

Aging................................................................................................................................................................................. 24

Forwarding ........................................................................................................................................................................ 24

Switching Engine .............................................................................................................................................................. 27

MAC Operation ................................................................................................................................................................. 27

Inter Packet Gap (IPG) .............................................................................................................................................. 27

Back-Off Algorithm..................................................................................................................................................... 27

Late Collision ............................................................................................................................................................. 27

Illegal Frames ............................................................................................................................................................ 27

Full Duplex Flow Control............................................................................................................................................ 27

Half-Duplex Backpressure ......................................................................................................................................... 27

Broadcast Storm Protection....................................................................................................................................... 28

Port Individual MAC address and Source Port Filtering ............................................................................................ 28

MII Interface Operation ..................................................................................................................................................... 28

Turbo MII Interface Operation........................................................................................................................................... 29

RMII Interface Operation .................................................................................................................................................. 29

MII Management (MIIM) Interface .................................................................................................................................... 31

Serial Management Interface (SMI).................................................................................................................................. 31

Advanced Switch Functions .............................................................................................................................................. 32

Bypass Mode .................................................................................................................................................................... 32

IEEE 802.1Q VLAN Support............................................................................................................................................. 32

QoS Priority Support......................................................................................................................................................... 33

Port-Based Priority..................................................................................................................................................... 33

802.1p-Based Priority ................................................................................................................................................ 33

DiffServ-Based Priority .............................................................................................................................................. 34

September 2009

M9999-092309-1.2

Micrel, Inc.

KSZ8873MLL/FLL/RLL

Spanning Tree Support..................................................................................................................................................... 34

Rapid Spanning Tree Support .......................................................................................................................................... 35

Tail Tagging Mode ............................................................................................................................................................ 35

IGMP Support ................................................................................................................................................................... 36

IGMP Snooping ......................................................................................................................................................... 36

Multicast Address Insertion in the Static MAC Table ................................................................................................ 36

Port Mirroring Support ...................................................................................................................................................... 36

Rate Limiting Support ....................................................................................................................................................... 37

Unicast MAC Address Filtering......................................................................................................................................... 37

Configuration Interface ..................................................................................................................................................... 37

I C Master Serial Bus Configuration .......................................................................................................................... 37

I2C Slave Serial Bus Configuration ........................................................................................................................... 38

SPI Slave Serial Bus Configuration ........................................................................................................................... 39

Loopback Support............................................................................................................................................................. 42

Far-end Loopback...................................................................................................................................................... 42

Near-end (Remote) Loopback ................................................................................................................................... 43

MII Management (MIIM) Registers ..................................................................................................................................... 44

PHY1 Register 0 (PHYAD = 0x1, REGAD = 0x0): MII Basic Control........................................................................ 45

PHY2 Register 0 (PHYAD = 0x2, REGAD = 0x0): MII Basic Control........................................................................ 45

PHY1 Register 1 (PHYAD = 0x1, REGAD = 0x1): MII Basic Status ......................................................................... 46

PHY2 Register 1 (PHYAD = 0x2, REGAD = 0x1): MII Basic Status ......................................................................... 46

PHY1 Register 2 (PHYAD = 0x1, REGAD = 0x2): PHYID High................................................................................ 46

PHY2 Register 2 (PHYAD = 0x2, REGAD = 0x2): PHYID High................................................................................ 46

PHY1 Register 3 (PHYAD = 0x1, REGAD = 0x3): PHYID Low................................................................................. 46

PHY2 Register 3 (PHYAD = 0x2, REGAD = 0x3): PHYID Low................................................................................. 46

PHY1 Register 4 (PHYAD = 0x1, REGAD = 0x4): Auto-Negotiation Advertisement Ability ..................................... 47

PHY2 Register 4 (PHYAD = 0x2, REGAD = 0x4): Auto-Negotiation Advertisement Ability ..................................... 47

PHY1 Register 5 (PHYAD = 0x1, REGAD = 0x5): Auto-Negotiation Link Partner Ability ......................................... 47

PHY2 Register 5 (PHYAD = 0x2, REGAD = 0x5): Auto-Negotiation Link Partner Ability ......................................... 47

PHY1 Register 29 (PHYAD = 0x1, REGAD = 0x1D): Not supported ........................................................................ 48

PHY2 Register 29 (PHYAD = 0x2, REGAD = 0x1D): LinkMD Control/Status .......................................................... 48

PHY1 Register 31 (PHYAD = 0x1, REGAD = 0x1F): PHY Special Control/Status................................................... 48

PHY2 Register 31 (PHYAD = 0x2, REGAD = 0x1F): PHY Special Control/Status................................................... 48

Memory Map (8-bit Registers)............................................................................................................................................ 49

Global Registers ............................................................................................................................................................... 49

Port Registers ................................................................................................................................................................... 49

Advanced Control Registers ............................................................................................................................................. 49

Register Description ........................................................................................................................................................... 50

Global Registers (Registers 0 – 15) ................................................................................................................................. 50

Register 0 (0x00): Chip ID0 ....................................................................................................................................... 50

Register 1 (0x01): Chip ID1 / Start Switch................................................................................................................. 50

Register 2 (0x02): Global Control 0 ........................................................................................................................... 50

Register 3 (0x03): Global Control 1 ........................................................................................................................... 51

Register 4 (0x04): Global Control 2 ........................................................................................................................... 51

Register 5 (0x05): Global Control 3 ........................................................................................................................... 52

Register 6 (0x06): Global Control 4 ........................................................................................................................... 53

Register 7 (0x07): Global Control 5 ........................................................................................................................... 53

Register 8 (0x08): Global Control 6 ........................................................................................................................... 54

Register 9 (0x09): Global Control 7 ........................................................................................................................... 54

Register 10 (0x0A): Global Control 8......................................................................................................................... 54

Register 11 (0x0B): Global Control 9......................................................................................................................... 54

Register 12 (0x0C): Global Control 10 ...................................................................................................................... 54

Register 13 (0x0D): Global Control 11 ...................................................................................................................... 54

Register 14 (0x0E): Global Control 12....................................................................................................................... 55

Register 15 (0x0F): Global Control 13....................................................................................................................... 55

Port Registers (Registers 16 – 95) ................................................................................................................................... 56

Register 16 (0x10): Port 1 Control 0.......................................................................................................................... 56

September 2009

M9999-092309-1.2

KSZ8873RLLI

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