User`s guide

KSZ8864 Evaluation Board User’s Guide
Micrel Inc. Page 8 5/9/2014
JP30 SM3RXD2 Disable Back Pressure Enable Back Pressure
JP31 SM3RXD1 Drop excessive collision
packets
Do not drop excessive
collision packets
JP32 SM3RXD0 Aggressive back off disable Aggressive back off enable
JP39 P1LED0 SW4-MII mode SW4-RMII mode
JP41 P1LED1 Device is clock mode when use
RMII interface
Device is normal mode when
use RMII interface
JP42 P2LED0 SW3-MII mode SW3-RMII mode
JP47
3-pin
Default is 1-2
close for DC
from 5V Jack
1-2 Close: 5V DC is from the
power jack of AC adapter
2-3 Close: 5V DC is from the
USB connector.
JP49
3-pin
Default is 1-2
close for 3.3V
1-2 Close: Provide 3.3V to port
4 connector for external single
PHY eval board
2-3 Close: Provide 5V to port
4 connector for external single
PHY eval board
JP50
3-pin
Default is 1-2
close for 3.3V
1-2 Close: Provide 3.3V to port
3 connector for external single
PHY eval board
2-3 Close: Provide 5V to port
3 connector for external single
PHY eval board
Table 2 Reserved Jumpers
Jumper Number Description Recommended Settings
JP19 SM4RXDV Open
JP28 SM3RXDV Open
JP34 SM3CRS Open
JP35 SM3COL Open
4.2 EEPROM Mode
The evaluation board has an EEPROM to allow the user to explore more extensive capabilities of
the KSZ8864. 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 KSZ8864 evaluation board for EEPROM configuration follow these steps:
1. Copy the Micrel provided EEPROM software to your computer.
2. Set JP3, JP4, JP5 and JP9 as specified in Table 3 for EEPROM mode configuration. Make sure
that the EEPROM is installed on the board.
Table 3 EEPROM Mode Settings
Jumper Description Setting
JP1 EEPROM Closed
JP2 EEPROM Closed
JP3 MDC Open