Xilinx Spartan-3A User Manual page 103

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Figure 12-13: iMPACT Uses the JTAG Clock Input TCK for Startup Clock when Programming via JTAG
Spartan-3A/3AN Starter Kit Board User Guide
UG334 (v1.0) May 28, 2007
Creating and Programming Configuration Images for SPI Serial Flash
Select the FPGA bitstream file (*.bit) to be programmed into the FPGA, as shown in
Figure 12-12. This step is superfluous but required for iMPACT 9.1i. This step will be
eliminated starting in iMPACT 9.2i. This file is not the special FPGA-based SPI
programming application.
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Figure 12-12: Select the FPGA Bitstream File and Enable SPI Programming
Select Enable Programming of SPI Flash Device Attached to this FPGA.
Click Open.
The iMPACT software warns that it changed the Startup clock source over to the JTAG
clock pin, TCK. The SPI Flash image is not affected. This warning is safely ignored.
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