dataFlash Module SPI

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Hi freaks, I've been browsing the Internet looking for a dataFlash Module.  I need the largest possible but can only find 128MBit Modules.  So could any of you freaks point me in the right direction?

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Simply cascade the modules. Then you can have as much as you want. You will have to manage this in firmware and ass a /CS line for each module.

Jim

If you want a career with a known path - become an undertaker. Dead people don't sue! - Kartman

Please Read: Code-of-Conduct

Atmel Studio6.2/AS7, DipTrace, Quartus, MPLAB user

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was thinking that jgmdesign, thanks mate

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I think Micron have 1Gb devices. Failing that, you'll need to look at eMMc or other nand flash based devices.

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Hi Kartman, was looking at the implementation on ASF for the at45dbxx and it can be ported easily to use microSD cards.  one question I have is.  How many bytes (8 bits) are on a 1GByte microSD card?  i.e. is it 1GBits or Bytes.

 

thanks lads

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b is bits, B is bytes. Obviously for a 1Gbyte sdcard, you get 1 giga byte!
For serial flash devices they are usually specified in bits, so a 1Gb serial flash is 128Mbytes.

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thanks kartman...

 

****, I just noticed that I type in 1GByte!  Delete this post, it's very late here in Ireland

Last Edited: Wed. Apr 12, 2017 - 03:58 AM
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If you are going to use an sd card then perhaps use fatfs. then you can read-out the data on your PC if needed.

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that's exactly what I intend to do

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Maybe use a solid state drive?

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Happy enough with a microSD card for storage, more than adequate.

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Economies of scale make it a very hard choice NOT to use SD/MMC for bulk storage in this day and age. Almost every smartphone, tablet and camera have these so the numbers drive down the price.

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You're clearly not an Apple fanboy, Cliff!

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Indeed I am an anti-Apple evangelist! My wife, sister-in-law and especially brother-in-law represent the most intense strata of Apple fan-boys so I just try to maintain a balance. It staggers belief that people are willing to pay three times the price for a technically inferior, under specified piece of technology (with no headphone connection!) with hugely limited user interface.

 

BTW just typing this on a brand new Samsung Galaxy Android tablet with octo-core CPU that I unwrapped as a birthday gift a few days ago! ;-)

Last Edited: Thu. Apr 13, 2017 - 10:13 AM
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Guys, what's is the max size of microsD card supported?

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Supported by WHAT?

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Is there a limit on the size of microSD card you can use??

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My android has a 128gig card in it

Jim

If you want a career with a known path - become an undertaker. Dead people don't sue! - Kartman

Please Read: Code-of-Conduct

Atmel Studio6.2/AS7, DipTrace, Quartus, MPLAB user

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http://techcosupport.com/press/m...

 

says 8 Terabytes. As far as I know you cannot yet buy an SD/MMC with an 8TB capacity. 

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thanks clawson

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Guys, it was very simple to setup a fat32 file system on microSD using SPI0, NPCS 0 and enabling LUN2.  So how do I add anothere microSD to SPI0 NPCS1????????????????

How does the LUN know to use SPI0 NPCS 1!!!!!!!

 

PS, I'm using the ASF

Last Edited: Tue. Apr 18, 2017 - 09:50 PM
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Starting to think I do not touch the LUN2 settings and that maybe it sorts access to other sd cards itself.  I'll not know until I receive the hardware to test this idea.