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AR# 20737

Virtex-4 - What is the I/O Standard for VCC_CONFIG (VCCO of configuration bank, Bank0)?


General Description:

Page 9 of the Virtex-4 Configuration Guide (UG 071, v1.1, September 10, 2004) states that all dedicated input pins operate at the VCC_CONFIG LVTTL level. Is this correct? Can LVCMOS be used?

The Virtex-4 Configuration Guide is available at:



The I/O Standard for this is actually LVCMOS_12_F. The configuration guide should read as follows:

"All dedicated input pins operate at the VCC_CONFIG LVCMOS level. All active dedicated output pins operate at the VCC_CONFIG voltage level with the output standard set to LVCMOS_12F."

This will be updated in a future version of the Virtex-4 Configuration Guide.

AR# 20737
Date Created 09/04/2007
Last Updated 12/15/2012
Status Active
Type General Article