KSZ9031RNX-EVAL Board User’s Guide
Micrel, Inc.
August 17, 2012
Rev.
1.1
6/22
4.0 Hardware
Description
The KSZ9031RNX-EVAL board provides a standalone evaluation platform for the KSZ9031RNX
Gigabit Ethernet Transceiver. Configuration of the KSZ9031RNX is accomplished through on-
board jumper selections and/or by PHY register access via the KSZ9031RNX MDC/MDIO
management pins via the USB port (CN1).
Figure 1. KSZ9031RNX-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.
On-board, RGMII receive output clock and signals are looped back to RGMII transmit input clock
and signals to provide a standalone evaluation platform for the KSZ9031RNX device. Optionally,
the RGMII loop back path can be opened to allow the RGMII signals to be wired to a Gigabit MAC
on another board.
The KSZ9031RNX-EVAL board receives power from a DC power jack (J13). Any DC power
adapter in the range of 5V to 12V with a current rating of 2 Amp or better can be used.
Power Jack
(J13)
Reset
(S1)
USB Port
(CN1)
RJ-45 Jack
(RJ1)
RGMII
Signals
KSZ9031RNX
Single LEDs
(D2, D1)
Tri-color Dual LED
(D10)
KSZ9031RNX-
EVAL Board
