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SDRAM chips
 
AVR Freaks Forum Index » AVR32 (32-bit) Technical Forums » AVR32 Hardware
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luvocean1
PostPosted: Feb 10, 2012 - 04:12 AM
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Joined: Dec 26, 2006
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Location: Sydney, Australia
Ermm... thinking of hooking up some SDRAM chips to my UC3A 32bit atmel chips... what SDRAM chips do you guys use?
 
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ka7ehk
PostPosted: Feb 10, 2012 - 04:44 AM
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Joined: Nov 22, 2002
Posts: 12049
Location: Tangent, OR, USA
Might get a bigger response in the AVR32 forums.

Jim

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Jim Wagner
Oregon Research Electronics, Consulting Div.
Tangent, OR, USA

"The only thing standing between us and victory is defeat" P.G.Wodhouse in Wooster & Jeeves series
 
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Heihopp
PostPosted: Feb 12, 2012 - 02:05 PM
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Joined: Jun 04, 2007
Posts: 490
Location: Norway
I designed a board using the same SDRAM chip as the one on the EVK1100 kit (48lc16m16a2).

Code for init:

http://www.avrfreaks.net/index.php?name ... ight=enjoy
 
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luvocean1
PostPosted: Feb 13, 2012 - 12:09 AM
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Still learning the interfaces for SDRAM chips... umm... do u think it would be possible for UC3A to talk to a 32bit SDRAM? Rather than using 2 of 16bit chips?
 
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Heihopp
PostPosted: Feb 13, 2012 - 08:53 AM
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Joined: Jun 04, 2007
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No, I don't think that is possible because the MCU external data bus is 16 bit. The AVR32 AP7000 chips have 32 bit data bus, but that product is "mature" (avoid using it in new design).
 
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luvocean1
PostPosted: Feb 13, 2012 - 09:48 AM
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hhm.. ok. Also it seems UC3A0xxx series seems to be the only one that supports EBI as well as ethernet MAC...

What options do I have if I use the UC3A3 or UC3A4 series? I am keen to try these new ones but no ethernet Sad
 
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luvocean1
PostPosted: Feb 20, 2012 - 04:01 AM
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Guys I am looking at the MT48LC32M16 (micron) and the H5DU5162ETR (hynix) SDRAM...

but I am consfused why there are such price differences between to two. Hynix is considerably cheaper. But it has 66pins instead of the micron one which has standard 54pins....

Which one to use with an UC3C0512?
 
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