KSZ9031MNX-EVAL Board User’s Guide
Micrel, Inc.
August 17, 2012
Rev.
1.0
8/23
Jumper
KSZ9031MNX Pin Name
Setting
Function
Close pins (1, 2)
Select GMII TX_EN signal for GMII Loop Back
JP17 RX_DV
Close pins (2, 3)
Select MII RX_DV signal to MII Port (J1)
Close pins (1, 2)
Select GMII TXD3 signal for GMII Loop Back
JP18 RXD3
Close pins (2, 3)
Select MII RXD3 signal to MII Port (J1)
Close pins (1, 2)
Select GMII TXD2 signal for GMII Loop Back
JP19 RXD2
Close pins (2, 3)
Select MII RXD2 signal to MII Port (J1)
Close pins (1, 2)
Select GMII TXD1 signal for GMII Loop Back
JP20 RXD1
Close pins (2, 3)
Select MII RXD1 signal to MII Port (J1)
Close pins (1, 2)
Select GMII TXD0 signal for GMII Loop Back
JP21 RXD0
Close pins (2, 3)
Select MII RXD0 signal to MII Port (J1)
Close pins (1, 2)
Select GMII RX_ER signal for GMII Loop Back
JP22 TX_ER
Close pins (2, 3)
Select MII TX_ER signal to MII Port (J1)
Close pins (1, 2)
Select GMII RX_DV signal for GMII Loop Back
JP23 TX_EN
Close pins (2, 3)
Select MII TX_EN signal to MII Port (J1)
Close pins (1, 2)
Select GMII RXD3 signal for GMII Loop Back
JP24 TXD3
Close pins (2, 3)
Select MII TXD3 signal to MII Port (J1)
Close pins (1, 2)
Select GMII RXD2 signal for GMII Loop Back
JP25 TXD2
Close pins (2, 3)
Select MII TXD2 signal to MII Port (J1)
Close pins (1, 2)
Select GMII RXD1 signal for GMII Loop Back
JP26 TXD1
Close pins (2, 3)
Select MII TXD1 signal to MII Port (J1)
Close pins (1, 2)
Select GMII RXD0 signal for GMII Loop Back
JP27 TXD0
Close pins (2, 3)
Select MII TXD0 signal to MII Port (J1)
JP28
Close Jumper
Select 2.5V for KSZ9031MNX digital I/Os
(Set in conjunction with JP29 and JP30)
JP29
DVDDH
Close Jumper
Select 1.8V for KSZ9031MNX digital I/Os
(Set in conjunction with JP28 and JP30)
Close pins (1, 2)
Select 1.8V or 2.5V for KSZ9031MNX digital I/Os
(Set in conjunction with JP28 and JP29)
JP30 DVDDH
Close pins (2, 3)
Select 3.3V for KSZ9031MNX digital I/Os
Close Jumper
Close MDC clock to USB Controller (U6)
JP31
1
MDC
Open Jumper
Open MDC clock to USB Controller (U6)
Close Jumper
Close MDIO signal to USB Controller (U6)
JP32
1
MDIO
Open Jumper
Open MDIO signal to USB Controller (U6)
Note:
1
JP31 and JP32 connect the MDC/MDIO signals to U6 when U7 is not populated.
Table 1. KSZ9031MNX-EVAL Board – Jumper Definition
