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Highlighted
1,266 Views
Registered: ‎05-25-2018

Ultra RAM in ROM mode.

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?

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Advisor
Advisor
1,256 Views
Registered: ‎04-26-2015

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.

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Moderator
Moderator
1,181 Views
Registered: ‎07-21-2014

jvs@dyumnin.com

 

Also, Synthesis UG901 does not list "ultra" as an option for ROM_STYLE attribute:

https://www.xilinx.com/support/documentation/sw_manuals/xilinx2018_2/ug901-vivado-synthesis.pdf

 

Thanks

Anusheel 

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