KSZ8873MML Evaluation Board User’s Guide
Micrel, Inc.
January 11, 2011
Confidential
Rev. 1.1
4/11
1.0 Introduction
The KSZ8873MML is Micrel’s third generation fully integrated 3-port switch. The PHY units
support 10BASE-T and 100BASE-TX. The device has been designed for cost sensitive systems,
however, still offers a multitude of features, such as switch management, port and tag based
VLAN, QoS priority, Two MII interfaces and CPU control and data interfaces.
The KSZ8873MML 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 KSZ8873MML Evaluation Board provides a convenient means to evaluate the
KSZ8873MML’s rich feature set. Easy access is provided to all of the KSZ8873MML 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 KSZ8873MML, via a PC USB port.
2.0 Board Features
•
Micrel’s KSZ8873MML Integrated 3-Port 10/100 Managed Ethernet Switch
•
One RJ-45 Jacks for Ethernet LAN Interfaces with corresponding Isolation Magnetics
•
Auto MDI/MDI-X on the PHY port
•
PHY Mode and MAC Mode MII Connector for the Switch MII Interface
•
1 USB port to emulate an MIIM, EEPROM, SPI Interface
•
On board EEPROM
•
2 LEDs to Indicate the Status and Activity of the RJ45 port
•
1 power jack for 5VDC Universal Power Supply
3.0 Evaluation Kit Contents
The KSZ8873MML Evaluation kit includes the following:
•
KSZ8873MML Evaluation Board Revision 1.0
•
KSZ8873MML Evaluation Board User’s Guide
•
Micrel USB Configuration Software Version 1.05
•
KSZ8873MML 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 KSZ8873MML 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 KSZ8873MML’s full feature set. The board also features two MII
connectors for the Switch MII interface. These are to facilitate connections from the switch to
either the external CPUs or the external PHYs.
The KSZ8873MML evaluation board is easy to use. There are programmable LED indicators for
link and activity on port 2 and a power LED. A manual reset button allows the user to reset the
board without removing the power plug. A standard 5VDC power supply is included so that the
