KSZ8873MML Evaluation Board User’s Guide
Micrel, Inc.
January 11, 2011
Confidential
Rev. 1.1
7/11
Table 2: Reserved Jumpers
JUMPER
Description
Recommended Setting
JP79
MDC_PHY,MDIO_PHY
Open
JP40
P3 MII configuration
(For test only)
Open
JP41
P1 MII configuration
(For test only)
Open
JP106
3.3V Biased of transformer
Center (For test only)
Open
JP11
Power for Fiber Module.
(KSZ8873MLL doesn’t
support Fiber mode)
Open
JP29
REFCLKO1 enable.
(Only for RMII interface.
(KSZ8873MLL doesn’t
support RMII interface)
Open
JP28
REFCLKO3 enable.
(Only for RMII interface.
(KSZ8873MLL doesn’t
support RMII interface)
Open
4.2 I2C Master (EEPROM) Mode
The evaluation board has an EEPROM to allow the user to explore more extensive
capabilities of the KSZ8873MML. The user can conveniently program the EEPROM on
board using the USB port from any computer with a WIN 2000/XP environment and the
Micrel provided software. This makes it easy for the user to evaluate features like
“broadcast storm protection” and “rate control”.
To prepare the KSZ8873MML evaluation board for EEPROM configuration follow these
steps:
1.
Copy the Micrel provided EEPROM software to your computer.
2.
Set JP3, JP9, JP21, JP25, JP34 and JP35 as specified in Table 3 for EEPROM mode
configuration. Make sure that the EEPROM is installed on the board.
3.
Connect the computer’s USB port to the KSZ8873MML board with a USB port
cable.
4.
There are two way to power up the evaluation board:
a). Connect the 5 VDC power supply to the KSZ8873MML when JP44 pin1-2 is
closed.
b). 5 VDC power source from the USB port when JP44 pin 2-3 is closed.
5. The KSZ8873MML will power up in its default configuration if there is no
information in the EEPROM.
6. Program the desired settings into the EEPROM using the Micrel software. See the
USB_SPI Software User’s Guide
for details.
