KSZ8873MLL/FLL/RLL Evaluation Board User’s Guide
Micrel, Inc.
January 11, 2011
Confidential
Rev. 1.1
4/10
1.0 Introduction
The KSZ8873MLL/FLL/RLL is Micrel’s third generation fully integrated 3-port switch. The two
PHY units of KSZ8873MLL/RLL support 10BASE-T and 100BASE-TX. The KSZ8873FLL
supports 100BASE-FX. The devices have been designed for cost sensitive systems, however,
still offer a multitude of features, such as switch management, port and tag based VLAN, QoS
priority, one MII interfaces and CPU control and data interfaces.
The KSZ8873MLL/FLL/RLL is an excellent choice for VoIP Phone, Set-top/Game Box, SOHO
Residential Gateway, industrial Ethernet systems and as a standalone 3-port switch.
The KSZ8873MLL/FLL/RLL Evaluation Board provides a convenient means to evaluate the
KSZ8873MLL/FLL/RLL’s rich feature set. Easy access is provided to all of the
KSZ8873MLL/FLL/RLL pins, with jumpers and interface connectors allowing quick configuration
and re-configuration of the board. MIIM, EEPROM programming, SPI emulation software are
also provided to access the more extensive features of the KSZ8873MLL/FLL/RLL, via a PC USB
port.
2.0 Board Features
•
Micrel’s KSZ8873MLL/FLL/RLL Integrated 3-Port 10/100 Managed Ethernet Switch
•
Two RJ-45 Jacks for Ethernet LAN Interfaces with corresponding Isolation Magnetics
(KSZ8873MLL/RLL)
•
Auto MDI/MDI-X on the PHY port
•
1 PHY Mode and 1 MAC Mode MII Connectors for the Switch RMII/MII Interface
•
2 100Base-FX fiber interface(KSZ8873FLL)
•
1 USB port to emulate an MIIM, EEPROM, SPI Interface
•
On board EEPROM
•
2 LEDs per port to Indicate the Status and Activity of the RJ45 port
•
1 power jack for 5VDC Universal Power Supply
3.0 Evaluation Kit Contents
The KSZ8873MLL/FLL/RLL Evaluation kit includes the following:
•
KSZ8873MLL/FLL/RLL Evaluation Board Revision 1.0
•
KSZ8873MLL/FLL/RLL Evaluation Board User’s Guide
•
Micrel Switch Configuration Software Version 1.0.5
•
Micrel Switch Configuration Software User Guide
•
KSZ8873MLL/FLL/RLL Evaluation Board Schematic Revision 1.0
(Contact your Micrel FAE for the latest schematic)
Note: USB cable and 5V DC Wall Power Supply is not included in the design kit (the dimension of
the output plug of 5V DC wall power supply is 2.5x5.5x9.5mm or 0.1x0.218x0.375inch)
4.0 Hardware Description
The KSZ8873MLL/FLL/RLL Evaluation Board is in a compact form factor and can sit on a bench
near a computer. There are three options for configuration: strap in mode, EEPROM mode, and
SPI mode. Strap in mode configuration is easily done with on board jumper options. EEPROM
mode and SPI mode are accomplished through a built in USB port interface. With the Micrel
software and your PC, you can use the USB port to reprogram the EEPROM on board, or use the
SPI interface to access the KSZ8873MLL/FLL/RLL’s full feature set. The board also features one
