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Ddr Memory

February 2nd, 2009

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Can you interface a uC to a ddr memory?

I have some old kingmax 256mb ddram. Can you just remove one of the 32M chips and tie the address+data+control line to a microcontroller (8 bit or 32 bit)? Would be nice to have such a large (and free) place to store something temporary (like recording audio or sampled data)
Btw could not find the datasheet of the memory. Would have looked myself.

No, do NOT remove the chips. It's a LOT more convenient to just include a connector and stuff the device into it. Pick up the standard for interfacing into one from Jedec (direct link below for DDR.) The chips (and the DDR stick, too) require refreshing -- it's not static ram. Luckily, the sticks include all the stuff needed for automatic refreshing of the memory, which is a strong reason already for keeping it as a complete module.

If you use Jedec's site, they want you to sign up. But there is no charge for the doc.

If you do actually get the interface working, I'd like to hear more about the details you managed. You can write directly to me. But of course that is entirely up to you. I'm just interested, is all.

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HyperX Impact 16GB 2400MHz DDR4 CL14 260 Pin SODIMM Laptop Memory NOT WORKING
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32GB LOT OF 8 X Hynix 4GB 2Rx4 PC2 5300F 55 11 Server RAM DDR2 667MHz DIMM
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Crucial 8GB 2x 4GB PC3L 12800 2RX8 DDR3L 1600MHz Laptop Memory RAM 204pin Intel
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For Samsung 32GB KIT 4x8GB PC2 5300F DDR2 667MHz ECC FB DIMM Server Memory RAM
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