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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

I don't know what chips would do without any clock. I presume they would draw normal quiescent current. I've seen a number of embedded processor boards with DRAM chips, where the DRAM controller isn't turned on until enabled by software. And in some applications where the DRAM isn't needed, it may not ever be enabled. So, I don't think there is any problem with excessive current draw. Of course, this is only anecdotal.

My main concern is making sure they don't draw excessive current (latch up, or floating input).