KSZ9031MNX-EVAL Board User’s Guide
Micrel, Inc.
August 17, 2012
Rev.
1.0
7/23
4.1 Jumper Setting & Definition
At power-up, the KSZ9031MNX device is configured via strapping pins that are set by external
pull-up and pull-down resistors. The KSZ9031MNX-EVAL board provides jumpers for the
KSZ9031MNX device strap-in settings and for selective board options.
Jumpers allow for quick configuration and re-configuration. To override the current KSZ9031MNX
device and board settings, simply select and close the desired jumper setting(s) and toggle the
on-board manual reset button (S1) for the new setting(s) to take effect.
The KSZ9031MNX-EVAL board jumper settings are defined in the table below.
Jumper
KSZ9031MNX Pin Name
Setting
Function
KSZ9031MNX Device Strapping Pins
Close pins (1, 2)
Set MODE3 = 1
JP1 MODE3
Close pins (2, 3)
Set MODE3 = 0
Close pins (1, 2)
Set MODE2 = 1
JP2 MODE2
Close pins (2, 3)
Set MODE2 = 0
Close pins (1, 2)
Set MODE1 = 1
JP3 MODE1
Close pins (2, 3)
Set MODE1 = 0
Close pins (1, 2)
Set MODE0 = 1
JP4 MODE0
Close pins (2, 3)
Set MODE0 = 0
Close pins (1, 2)
Set PHYAD2 = 1
JP11 PHYAD2
Close pins (2, 3)
Set PHYAD2 = 0
Close pins (1, 2)
Set PHYAD1 = 1
JP12 PHYAD1
Close pins (2, 3)
Set PHYAD1 = 0
Close pins (1, 2)
Set PHYAD0 = 1
JP13 PHYAD0
Close pins (2, 3)
Set PHYAD0 = 0
Close pins (1, 2)
Enable 125 MHz Clock Output
JP10 CLK125_EN
Close pins (2, 3)
Disable 125 MHz Clock Output
Close pins (1, 2)
Select Single LED Mode
JP9 LED_MODE
Close pins (2, 3)
Select Tri-color Dual LED Mode
KSZ9031MNX-EVAL Board Settings
Close pins (1, 2)
Use for Single LED Mode
JP7 LED2
Close pins (2, 3)
Use for Tri-color Dual LED Mode
Close pins (1, 2)
Use for Single LED Mode
JP8 LED1
Close pins (2, 3)
Use for Tri-color Dual LED Mode
Close pins (1, 2)
Select MDC clock to MII Port (J1)
JP6 MDC
Close pins (2, 3)
Select MDC clock to USB Controller (U6)
Close pins (1, 2)
Select MDIO signal to MII Port (J1)
JP5 MDIO
Close pins (2, 3)
Select MDIO signal to USB Controller (U6)
Close pins (1, 2)
Select GMII GTX_CLK clock for GMII Loop Back
JP14 RX_CLK
Close pins (2, 3)
Select MII RX_CLK clock to MII Port (J1)
Close pins (1, 2)
Select GMII RX_CLK clock for GMII Loop Back
JP15 GTX_CLK
Close pins (2, 3)
Select MII TX_CLK clock to MII Port (J1)
Close pins (1, 2)
Select GMII TX_ER signal for GMII Loop Back
JP16 RX_ER
Close pins (2, 3)
Select MII RX_ER signal to MII Port (J1)
