Micrel KSZ8895ML, Руководство пользователя

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KSZ8895ML Evaluation Board User’s Guide
Micrel Inc. Confidential Page 7 3/26/2014
4.1.1 Feature Setting Jumpers
The evaluation board provides jumpers to allow the user to easily set strap in configurations for the
KSZ8895ML. Table 1 describes the jumpers and their function in the open or closed state.
Table 1 Feature Setting Jumpers
Jumper KSZ8895ML
Signal 2-pin Jumper Open
3-pin Jumper 1-2 Closed
2-pin Jumper Closed
3-pin Jumper 2-3 Closed
JP1 SDA SPI or EEPROM MDC/MDIO for MIIM/SMI
JP2 SCL SPI or EEPROM MDC/MDIO for MIIM/SMI
JP3 SPIQ SPI and EEPROM EEPROM and MDC/MDIO
JP9 SCL MDC/MDIO EEPROM
JP4 PS0 SPI and EEPROM SMI
JP5 PS1 EEPROM and SMI SPI
JP6 SCONF0 MAC mode or disable MII SW5-MII PHY mode or SNI
JP7 SCONF1 PHY mode or disable MII SW5-MII MAC mode or SNI
JP8 PWRDN Normal Operation Hardware power down
JP25 PMRXD3 Enable flow control Disable flow control
JP26 PMRXD2 Disable Back Pressure Enable Back Pressure
JP27 PMRXD1 Drop excessive collision
packets Do not drop excessive
collision packets
JP28 PMRXD0 Aggressive back off disable Aggressive back off enable
JP29 PMRXER Max Packet Size up to
1522/1518 bytes Max Packet Size up to 1536
bytes
JP30 PCRS Force Half Duplex on port 4
if AN is disabled or failed Force Full duplex on port 4 if
AN is disabled or failed
JP31 PCOL No Force Flow Control on
port 4 Force Flow Control on port 4
JP32 SMRXDV Disable SW5-MII and RMII
Flow Control Enable SW5- MII and RMII
Flow Control
JP33 SMRXD3 SW5-MII Half Duplex
Mode SW5-MII Full Duplex Mode
JP34 SMRXD2 SW5-MII 100BT mode SW-MII 10BT mode
JP35 SMRXD1 LED Mode 0:
LEDx_2 = Link/Act
LEDx_1 = Full Duplex/Col
LEDx_0 = Speed LED Mode 1:
LEDx_2 = 100Link/Act
LEDx_1 = 10Link/Act
LEDx_0 = Full Duplex
JP36 SMRXD0 Disable SW5-MII Flow
Control Enable SW5- MII Flow
Control
JP45 LED5_1 Normal Operation (Default)
JP46 LED5_2 Enable Aging Disable Aging
JP44
3-pin DC from 5V Jack 1-2 Close: 5V DC from the
power jack of AC adapter
2-3 Close: 5V DC from the
USB connector.