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AR# 15823

5.1isp1 iMPACT - The "Load FPGA" option does not successfully load the FPGA -- INIT toggles more than once


General Description: 

When I use the "Load FPGA" command in iMPACT 5.1i with Service Pack 1, I cannot configure the FPGA with the PROM directly after programming. I must toggle power before the FPGA will successfully load.  


If I watch INIT, I see that it toggles in this situation.


The problem occurs when iMPACT uses concurrent mode, which causes it to put another CONLD instruction after the CONFIG instruction. This can been seen if an SVF file is created for the PROM.  


To work around this issue, program the PROM without concurrent mode by going to Edit -> Preferences -> and de-selecting "Concurrent" mode.

AR# 15823
Date Created 09/03/2007
Last Updated 05/15/2014
Status Archive
Type General Article