Figure a-3 – Digilent 6003-410-000P-KIT User Manual

Page 73

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XUP Virtex-II Pro Development System

www.xilinx.com

73

UG069 (v1.0) March 8, 2005

1-800-255-7778

R

When the Cable Communications Setup dialog box is displayed, the Communications
Mode radio button must be set to Platform Cable USB as shown in

Figure A-3

. If no USB

host is available, then select Parallel IV, attach a PC4 cable to J27.

Regardless of the native communications speed of the host USB port, target devices can be
clocked at any of six different frequencies by making the appropriate selection in the TCK
Speed/Baud Rate drop-down list.

The default clock rate of 6 MHz is selected by iMPACT, because all Xilinx devices are
guaranteed to be programmed at that rate. The basic XUP Virtex-II Pro Development
System contains a Platform FLASH PROM and a Virtex-II Pro FPGA. This combination of
devices does not support the maximum JTAG TCK clock frequency. This means that the
TCK Speed/Baud Rate could be set to 12 MHz. If expansion circuit boards that contain
programmable devices are added to the basic system, the user must ensure that the JTAG
clock frequency does not exceed the capability of the additional devices.

Figure A-3:

iMPACT Cable Communication Setup Dialog

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