06-27-2018 04:48 AM
Today I discovered through trail and error that Ultra RAM does not support memory initialization and rom_style="ultra" option. Is this correct? If yes, is this explicitly documented someplace?
06-27-2018 05:01 AM
It's documented in UG573:
The UltraRAM memory is initialized to all 0's during power up or device reset. There is
no user defined INIT attribute and therefore the content of the SRAM array cannot be
initialized to user defined values.
07-04-2018 12:32 AM
Also, Synthesis UG901 does not list "ultra" as an option for ROM_STYLE attribute: