VSC8257/VSC8258 Evaluation Board
ENT-AN1280 VPPD-04670 ENT-AN1280 User Guide Revision 1.3
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Quick Start
The following items are recommended for use during evaluation of the evaluation board.
VSC8257/8258 evaluation board (included in the kit)
USB cable (included in the kit)
GUI installation file (available on the website)
SR/LR SFP+ module (not included)
Fiber patch cable (not included)
Pattern generator or protocol tester
Oscilloscope
Personal computer running Windows XP or 7
The following steps allow a user to bring up the VSC8258EV, receive traffic from a tester, loop traffic
internal to the device, and transmit back to the tester.
Provide 5 V power supply to the evaluation board.
Connect the USB cable to the evaluation board (J34) and to a PC.
Insert a 10G module into P1 (channel 2).
Connect the optical patch cable to the module and to the 10G tester.
Install the USB driver as described in section
.
USBXpress® Driver Installation
Install the GUI software as described in section
.
GUI Setup
Launch the GUI.
From the EVB connection window, select the matching board serial number and click
.
Launch GUI
The clock is pre-configured at 156.25 MHz.
On the main page, click the
option. This will initialize the device. Due to the speed of
10G LAN Mode
the microcontroller and USB interface, this operation may take a minute. During initialization, the
bottom status bar will indicate initialization in progress. When completed, the text will change to
indicate so. Closing the GUI and re-launching without power cycling the board or pressing the reset
button will retain the previously initialized mode.
After initialization, the respective line- or host-side Rx and Tx PLL status will show a green state. The
10G protocol tester should also indicate a link-up condition. Because there is no valid data present
at the XAUI receiver, end-to-end traffic will not flow.
On the Routing tab, enable Loopback L3 for channel 0 (R)XAUI Rx. The 10G tester should now see
valid packets at its receiver.
