I'm using Virtex-II DCM frequency synthesizer to get 52MHz clock from
16MHz. Two questions: 1) Since my input frequency is outside the minimum operating range in the low frequency mode(24MHz), I cannot use CLKFB feedback. Is there any easy way to override this restriction. 2) I tried doing this freq. conversion without CLKFB using CLKFX_DIVIDE = 4, CLKFX_MULTIPLY=13 parameters. Output is connected to CLKFX. Input is connected directly from external source. I'm measuring 64MHz on that output instead of 52MHz. Is there anything wrong with those particular parameters?Thanks, Eugene.