topic Re: Speed of Flash Interface in i.MX Processors

Speed of Flash Interface

vinoth_ta — Mon, 18 Mar 2019 12:32:35 GMT

Hello, I have a been looking a solution to provide highest possible NAND Flash interface. imax8m itself having limitation to support TLC etc.

From the application processors manual,

eMMC => DDR mode can support up to 400 Mbytes/sec whereas raw NAND can support up to 200 Mbytes/sec.

Looks like eMMC is faster than raw NAND.

I am not clear on the ECC etc. Which interface(eMMC or raw NAND) will be having better throughput?

Re: Speed of Flash Interface

art — Tue, 19 Mar 2019 09:29:15 GMT

Yes, you are right, the SD/eMMC interface of the i.MX8M processor is faster than the Raw NAND interface.

For SD/eMMC devices, all ECC and other required processing is perfomed within the device, so, there are no special features required from the processor.

Have a great day,
Artur

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Re: Speed of Flash Interface

vinoth_ta — Tue, 19 Mar 2019 12:52:33 GMT

Hi Artur,

Thanks for your information.

Is there any application note explain about these information.

I am interested to know the throughput of raw NAND or eMMC. I would need

to select the device which is having better throughput.

Regards,

Vinoth TA

Re: Speed of Flash Interface

art — Wed, 20 Mar 2019 07:15:41 GMT

There is no separate Application Note document for that. Please refer to the numbers, given in the Data Sheet document.

Best Regards,

Artur