Why does the ALTLVDS_RX megafunction only show an input clock frequency of 100 MHz? - Why does the ALTLVDS_RX megafunction only show an input clock frequency of 100 MHz? Description Due to a problem in the Quartus® II software version 10.1 SP1 and earlier, the ALTLVDS_RX MegaWizard™ Plug-In may incorrectly display a constant 100 MHz value for the input clock frequency when running on 64-bit Windows platforms. To work around this problem, review the related solution below. If this does not resolve your problem, a patch is available to fix this problem for the Quartus II software versions 10.1 and 10.1SP1. Download and install the appropriate patch from the links below: For the Quartus II software version 10.1: Download the Quartus II software version 10.1 Patch 0.57 for Windows (.exe) Download the Readme for the Quartus II software version 10.1 Patch 0.57 (.txt) For the Quartus II software version 10.1 SP1: Download the Quartus II software version 10.1 SP1 Patch 1.16 for Windows (.exe) Download the Readme for the Quartus II software version 10.1 Patch 1.16 (.txt) This problem is scheduled to be fixed in a future version of the Quartus II software. Related Articles Why does the ALTLVDS_RX MegaWizard only show an input clock frequency of 100 MHz? Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']