KSZ8873MML Evaluation Board User’s Guide
Micrel, Inc.
January 11, 2011
Confidential
Rev. 1.1
6/11
start in strap in configuration mode, make sure that the USB cable is unplug, JP34 and JP35 ,
JP3 and JP9 are connected, JP21, JP25 have jumpers fitted between pins 2 to 3.
4.1.1
Feature Setting Jumpers
The evaluation board provides jumpers to allow easy setting of strap in configurations for the
KSZ8873MML. Table 1 describes the jumpers and their functionalities.
Table 1: Feature Setting Jumpers
JUMPER
KSZ8873MML
SIGNAL
OPEN
CLOSED
JP3
SPIQ
SPI
EEPROM
JP25
P2LED0
EEPROM/SPI Setting. See Section 4.2 and 4.3
JP21
P2LED1
EEPROM/SPI Setting. See Section 4.2 and 4.3
JP26
SMRXDV3
P3 MII Setting. Pull Up: PHY mode, Pull Down: MAC mode
JP27
SMRXD13
P1 MII Setting. Pull Up: PHY mode, Pull Down: MAC mode
JP78
FXSD1
Pins 1-2 closed : Force port 1 FX mode
Pins 5-6 closed : Force port 1 TX mode
For KSZ8873MML, close 5-6 since this device doesn’t
support FX mode.
JP2
PWRDN
Normal Operation
KSZ8873MML
Chip Power Down
JP30
P1FFC
Pull Down = Disable
Pull Up(default) = Enable
JP46
P1DPX
Pull Down = Half Duplex
Pull Up(default) = Full Duplex
JP31
P1SPD
Pull Down = 10BT
Pull Up(default) = 100BT
JP32
P2FFC
Pull Down = Disable
Pull Up(default) = Enable
JP47
P2DPX
Pull Down = Half Duplex
Pull Up(default) = Full Duplex
JP33
P2SPD
Pull Down = 10BT
Pull Up(default) = 100BT
JP33
P2ANEN
Pull Down = Disable
Pull Up(default) = Enable
JP37
P3FFC
Pull Down = Disable
Pull Up(default) = Enable
JP48
P3DPX
Pull Down = Full Duplex
Pull Up(default) = Half Duplex
JP38
P3SPD
Pull Down = 100BT
Pull Up(default) = 10BT
JP33
XCLK
Pull Down = 50MHz
Pull Up(default) = 25MHz
Note:
JP33, JP47 and JP32 are only valid if Auto-Negotiation is disabled.
The following table shows the recommended settings for the evaluation board reserved jumpers.
