SDRAM with a SAM4 MCU?

Discussion around product based on ARM Cortex M4 core.

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Bugs_Bunny
Posts: 8
Joined: Thu Sep 04, 2014 11:51 pm

SDRAM with a SAM4 MCU?

Tue Sep 09, 2014 9:19 am

I'm gathering parts for a project that does high quality audio recording and playback. The expected data generation is about 150KByte per second. This will be stored on an SD card, however I need to buffer at least a single if not two sectors of 512Kbyte each on the MCU itself. With the program itself I will run out of RAM very quickly so some extension is called for. I saw that some SAM4 MCUs come with an EBI but for static RAM only, my problem is that SRAM is very expensive and I would like to work with SRAM. Is there a good way to hook up a SAM4 to SDRAM and use it in high speed that will allow me to handle all that data that needs to be read from an ADC, written to a DAC and stored for long-term, all in about the same time. If the device itself can not do it is there some controller that is easy to interface with?
gerhardf
Posts: 554
Joined: Thu Dec 02, 2004 2:28 pm

Re: SDRAM with a SAM4 MCU?

Tue Sep 09, 2014 11:10 am

hello,
you could use a SAM7SE or any of the SAM9, all of them have a SDRAM-interface.

regards
gerhard
nutsnbolts
Posts: 31
Joined: Mon Aug 25, 2014 11:20 pm

Re: SDRAM with a SAM4 MCU?

Fri Oct 10, 2014 12:29 am

Is this the kind of thing you have in mind?

http://uk.rs-online.com/web/p/sram-memo ... s/0538271/

AS6C8016-55ZIN, SRAM Memory 8Mbit, 512K words x 16 bit,, 2.7 → 5.5 V, 44-Pin, TSOP II at GBP £4.47 each + VAT if applicable.

I know SDRAM costs a lot less, but for simplicity...?
(I have no connection to RS other than as a paying customer)
Regards,
Mike.

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