5497 - All Devices: Can the USERCODE be defined using an HDL attribute in RTL?

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• Radiant and VHDL: How to enable open drain on I/O using RTL code?

  Description: The opendrain I/O properties can be done on RTL using synthesis attribute (SynplifyPro). Solution: VHDL example: entity counter is Port ( rst,clk : in std_logic; o: out std_logic_vector(0 to 3); myoutput: out std_logic); attribute ...

• Diamond and Radiant version 2023.2 SP1 and older: HDL Parameter set under Active Implementation options not taking effect in VHDL design when using LSE

  Description: In Diamond and Radiant 2023.2 SP1 and older, while using LSE as the Synthesis Tool, the HDL Parameter in Active Implementation options may not take effect. Solution: This is a known issue for VHDL designs. See the following code: ...

• 1048 - Lattice Diamond: Synthesis: Synplify Pro: How to change the type of memory resources Synplify Pro uses when using inferred memory in HDL code?<br>

  Lattice Diamond: Synthesis: Synplify Pro: In many cases HDL code that infers a memory is implemented as EBR-based memory. This can cause issues for a customer who needs to be able to reset this memory to zero during operation. The Synplify compiler ...

• JEDEC File USERCODE location: When editing USERCODE of the JED file at Program File Utility editor, the USERCODE data was updated on U field but not on the config data. When editing USERCODE of the JED file at Diamond Spreadsheet View, the USERCODE data was updated on both U field and config data.

  There are two different USERCODE for two different memory blocks. One for SRAM and one for FLASH. The SRAM USERCODE stored in the bitstream USERCODE frame and the FLASH USERCODE stored in the U field of the JEDEC file. Using the Diamond Spreadsheet ...

• Lattice Nexus devices using Reveal: no output from LVDS IP

  Description: While debugging your Radiant design using Reveal, users may observe that there is no output from their LVDS IP. Solution: When Reveal is inserted in Nexus devices, on certain designs, the GSR net gets assigned to a reset signal that may ...