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Altera_Forum
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11 years ago

SRAM Difficulties Solved on DE1 Cyclone II

After weeks of difficulty using SRAM, this is a note to explain what not to do, and how to get SRAM to work. I had written a UART reader / writer to load and retrieve data to SRAM memory. It someti...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Hey, I had the same problem and the same solution: set the current drive strength to 4mA.

Note that it seems that only the control lines (address, WE_N, OE_N, etc.) need the setting changed. The data lines don't seem to matter.

Also, this is only a problem on newer DE2 boards with SRAM chips with built-in error detection (they have "ED" in their part number, e.g. IS[...]edBLL).