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Altera_Forum
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14 years ago

Using half of DDR2 SO-DIMM

I want to use 1/2 of a DDR2 so-dimm module with 32 bit wide DDR2 interface to Cyclone II. Has anyone done this? I believe this will work, provided I properly terminate the unused chips on the modul...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

The most interesting questions is how the RAM chips act power supply-wise when not being clocked. Will they stay idle or possibly draw excessive current? Honestly speaking, I'm not able to predict this from the datasheets.

Alternatively, you may want to explicitely set the unused chips to power down mode, which would require clocking it at least temporarily. But perhaps you can find information about behaviour of unclocked RAM chips in any data sheet or application note.