説明

Urgency : Standard 

General Description: 

Setting "Unused I/O Termination" to "Float" does not work. The unused I/Os all behave as if they were pulled up.

ソリューション

This problem is fixed in the latest 5.2i Service Pack available at: 

http://support.xilinx.com/xlnx/xil_sw_updates_home.jsp
The first service pack containing the fix is 5.2i Service Pack 2.