arduino-dram-tester

Test DRAM with Arduino Uno

Basic DRAM tester, outputs results to Serial, based on:

• https://www.insentricity.com/a.cl/252
• https://github.com/FozzTexx/DRAM-Tester
• http://www.chronworks.com/DRAM

Pinouts:

• DRAM pin -> Arduino UNO pin
• DIN -> 2
• DOUT -> 3
• CAS -> 5
• RAS -> 6
• WE -> 7
• A0 to A5 -> 8 to 13
• A6 to A9 -> A0 to A3

(Also connect DRAM supply pins)

The number of address lines is configurable by setting ADDR_BITS

Changes to original code:

• Writes output to serial, displaying which row and col failed
• Times the tests and writes how long it took, just out of curiosity so you can calculate of refresh is happening fast enough
• Does pattern tests first (10101... and 01010...) because this identified failed ram faster for me
• Added a random bit write test