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AR# 32390

Virtex-5 - How does the Bitgen configrate setting correspond to the actual CCLK frequency?

Description

How does the Bitgen configrate setting correspond to the actual CCLK frequency?

Solution

The configrate setting corresponds directly to the CCLK frequency.

2 -> 2 MHz

6 -> 6 MHz

9 -> 9 MHz

13 -> 13 MHz

Be aware that there is a Tolerance of +/- 50% on this frequency generated by this internal oscillator. This is specified by the FMCCKTOL parameter in the Virtex-5 Data Sheet (DS202) which can be found here:

http://www.xilinx.com/support/documentation/virtex-5.htm

AR# 32390
Date Created 04/09/2009
Last Updated 12/15/2012
Status Active
Type General Article