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Altera_Forum
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17 years ago

Help RAM

hi, i am quite new to vhdl and quartus ii. i have coded a 16x8 ram using vhdl in quartus , and y need a ram of 256kb , when y chage the address_width to 131072, that is the number of bits that...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Well, the original above design synthesizes as expected to an EP3C55 when using an address width of 17. However, Quartus apparently does nothing without utilizing considerable amounts of PC RAM. In this case it has to synthesize 215 LEs glue logic of multiplexers and decoders to connect the individual RAM blocks.