ishe Posted September 20, 2016 Report Share Posted September 20, 2016 Hi, I am writing an sdram application for Papilio pro and faced an issue caused by documentation inconsistency. The Micron datasheet of MT48LC4M16A2 says it is a 4906 row by 256 column chip and has 12 address pins A0-A11. The Papilio pro UCF file and schematic however has an A12 pin also on pin36 of the sdram chip. The datasheet has an NC pin on that location. So all in all shall I trust Micron datasheet or Papilio pro documents? Thanks Hege Quote Link to comment Share on other sites More sharing options...
alvieboy Posted September 21, 2016 Report Share Posted September 21, 2016 That's there to support larger devices in the future. Right now we tie that line to '0': DRAM_ADDR(12) <= '0'; Alvie Quote Link to comment Share on other sites More sharing options...
ishe Posted September 21, 2016 Author Report Share Posted September 21, 2016 Ok, Thanks. I was thinking the same just wanted to be sure. Hege Quote Link to comment Share on other sites More sharing options...
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