KSZ9031MNX-EVAL Board User’s Guide
Micrel, Inc.
August 17, 2012
Rev.
1.0
6/23
4.0 Hardware
Description
The KSZ9031MNX-EVAL board is the evaluation platform for the KSZ9031MNX Gigabit Ethernet
Transceiver. Configuration of the KSZ9031MNX is accomplished through on-board jumper
selections and/or by PHY register access via the KSZ9031MNX MDC/MDIO management pins
via the USB port (CN1).
Figure 1. KSZ9031MNX-EVAL Board
Features include a RJ-45 Jack for 10/100/1000 Ethernet speed cable connection, programmable
LED indicators for reporting link status and activity, and a manual reset button for quick reboot
after re-configuration of strapping pins.
GMII receive output clock and signals can be looped back to GMII transmit input clock and
signals to provide a standalone platform to evaluate the KSZ9031MNX device in 1000Mbps
mode.
MII Port (J1) provides the 10/100 MAC interface connections to Micrel KSZ88xx 3-port Switch
evaluation boards with the mating MII MAC interface connectors.
The KSZ9031MNX-EVAL board receives power from a DC power jack (J2). Any DC power
adapter in the range of 5V to 12V with a current rating of 2 Amp or better can also be used.
USB Port
(CN1)
Reset
(S1)
Power Jack
(J2)
KSZ9031MNX
RJ-45 Jack
(RJ1)
Single LEDs
(D2, D3)
Tri-color Dual LED
(D4)
Jumpers to select
GMII Loop Back or
MII Port (J1)
MII Port
(J1)
KSZ9031MNX-
EVAL Board
