User`s guide

KSZ8864 Evaluation Board User’s Guide
Micrel Inc. Page 7 5/9/2014
read the external EEPROM, if EEPROM does not exist, the chip will use the default values and the
strap option setting for all internal registers.
4.1.1 Feature Setting Jumpers
The evaluation board provides jumpers to allow the user to easily set strap in configurations for the
KSZ8864. Table 1 describes the jumpers and their function in the open or closed state.
Table 1 Feature Setting Jumpers
Jumper KSZ8864 Signal 2-pin Jumper Open
3-pin Jumper 1-2 Close
2-pin Jumper Closed
3-pin Jumper 2-3 Close
JP1 SCL SPI and MIIM/SMI EEPROM
JP2 SPIQ SPI EEPROM and MIIM/SMI
JP3 MDC SPI and EEPROM MIIM/SMI
JP4 MDIO SPI and EEPROM MIIM/SMI
JP8 PS0 EEPROM/SPI/SMI Setting. See Section 4.2 and 4.3
JP9 PS1 EEPROM/SPI/SMI Setting. See Section 4.2 and 4.3
JP48 Testing Power of EEPROM comes
from VDDIO
Power of EEPROM comes
from 3.3V only (default)
JP10 SCONF0 MII Setting See Section 4.6
JP11 SCONF1 MII Setting See Section 4.6
JP17
3-pin
Default is 2-3
close for port 4
SW4- MII
1-2 Close: SW4-RMII
provides 50MHz clock
2-3 Close: SW4-MII or
SW4-RMII receive 50MHz
clock from opposite
JP18
3-pin
Default is 1-2
close for port 4
SW4- MII
1-2 Close: SW4-MII mode.
Detail see schematics
2-3 Close: SW4-RMII
interface without clock
provided
JP20 SM4RXD3 Disable SW4-MII/RMII Flow
Control
Enable SW4- MII/RMII Flow
Control
JP21 SM4RXD2 SW4-MII/RMII Half Duplex
Mode
SW4-MII/RMII Full Duplex
Mode
JP22 SM4RXD1 SW4-MII/RMII 100BT mode SW4-MII/RMII 10BT mode
JP23 SMRXD0 LED Mode 0:
PxLED1 = Link/Act
PxLED0 = Speed
LED Mode 1:
PxLED1 = 100Link/Act
PxLED0 = Full Duplex
JP24
3-pin
Default is 2-3
close for pot 3
SW3- MII
1-2 Close: SW3-RMII
provides 50MHz clock
2-3 Close: SW3-MII mode or
SW3-RMII receive 50MHz
clock from opposite
JP27
3-pin
Default is 1-2
close for port 3
SW3- MII
1-2 Close: SW3-MII mode.
Detail see schematics
2-3 Close: SW3-RMII
interface without clock
provided
JP29 SM3RXD3 Enable device flow control Disable device flow control