Article Details

ID: 2005
Case Type: faq
Category: Architecture
Related To: IO
Family: All FPGA

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How do I select between the two Vol Max values 0.4V, or 0.2V documented in the LatticeECP3 device datasheet sysI/O Single-Ended DC Electrical Characteristics? 

Vol Max is not a user configurable setting.  For any of the LVCMOS pin configurations, under normal operating conditions Vol is specified to be a a maximum of 0.4V regardless of the drive strength that the pin was configured.  If the current draw falls below 0.1mA, Vol Max will drop to 0.2V or less.  This is true for all of the latest Lattice FPGA devices. 

Please refer to page 3-7 of the datasheet ds1021.