Minimal system for at91sam9*

I'm looking into running a minimal at91sam9 . I've been trying to
figure out how much minimal resources it would need to be reliable.

+ 16 or 32B SDRAM for linux ?
+ 2 MB NOR for u-boot(?)+kernel+initrd

Can I do away with NAND ? Is the sam9 capable of booting NOR directly ?

Anyone did that before ?
Start a New Thread

I did a project for a customer, with:
32MBytes of SDRAM.
4MBytes of dataflash for u-boot(?)+kernel+initrd

Hope this help.

M P escreveu:
>
> I'm looking into running a minimal at91sam9 . I've been trying to
> figure out how much minimal resources it would need to be reliable.
>
> + 16 or 32B SDRAM for linux ?
> + 2 MB NOR for u-boot(?)+kernel+initrd
>
> Can I do away with NAND ? Is the sam9 capable of booting NOR directly ?
>
> Anyone did that before ?

Start a New Thread

Hi,

16/32 MB of SDRAM should be perfect.
Try using 8/16MB of serial data flash instead of NOR flash.I think AT91sam9
is capable of booting from dataflash.
TVRPrasad

On Mon, Nov 9, 2009 at 5:51 PM, M P wrote:

> I'm looking into running a minimal at91sam9 . I've been trying to
> figure out how much minimal resources it would need to be reliable.
>
> + 16 or 32B SDRAM for linux ?
> + 2 MB NOR for u-boot(?)+kernel+initrd
>
> Can I do away with NAND ? Is the sam9 capable of booting NOR directly ?
>
> Anyone did that before ?
>
> Start a New Thread

I suggest that you research this in the errata. I remember that the earlier SAM9 parts could not boot from several devices that were listed as boot devices in the data sheets.

Rick
--- In A..., vishnu Tadepalli wrote:
>
> Hi,
>
> 16/32 MB of SDRAM should be perfect.
> Try using 8/16MB of serial data flash instead of NOR flash.I think AT91sam9
> is capable of booting from dataflash.
> TVRPrasad
>
> On Mon, Nov 9, 2009 at 5:51 PM, M P wrote:
>
> >
> >
> > I'm looking into running a minimal at91sam9 . I've been trying to
> > figure out how much minimal resources it would need to be reliable.
> >
> > + 16 or 32B SDRAM for linux ?
> > + 2 MB NOR for u-boot(?)+kernel+initrd
> >
> > Can I do away with NAND ? Is the sam9 capable of booting NOR directly ?
> >
> > Anyone did that before ?
> >
>

Start a New Thread

Yes, If you boot on embedded ROM. it supports dataflash (not Atmel's
at25/26df series), nandflash, SD.

Weiguo

________________________________

From: A... [mailto:A...] On Behalf
Of vishnu Tadepalli
Sent: Tuesday, November 10, 2009 9:11 AM
To: A...
Subject: Re: [AT91SAM] Minimal system for at91sam9*

Hi,

16/32 MB of SDRAM should be perfect.
Try using 8/16MB of serial data flash instead of NOR flash.I think
AT91sam9 is capable of booting from dataflash.
TVRPrasad
On Mon, Nov 9, 2009 at 5:51 PM, M P > wrote:

I'm looking into running a minimal at91sam9 . I've been trying
to
figure out how much minimal resources it would need to be
reliable.

+ 16 or 32B SDRAM for linux ?
+ 2 MB NOR for u-boot(?)+kernel+initrd

Can I do away with NAND ? Is the sam9 capable of booting NOR
directly ?

Anyone did that before ? Start a New Thread

Thanks guys; so it seems it's a better deal to boot from NAND directly.

Does anyone know of a devboard (apart from the -EK) using the G20 in that
"minimalist" spirit ?

Michael

On Tue, Nov 10, 2009 at 2:21 AM, Chen, Weiguo (GE, Research) <
w...@ge.com> wrote:

> Yes, If you boot on embedded ROM. it supports dataflash (not Atmel's
> at25/26df series), nandflash, SD.
>
> Weiguo
>
> ------------------------------
> *From:* A... [mailto:A...] *On
> Behalf Of *vishnu Tadepalli
> *Sent:* Tuesday, November 10, 2009 9:11 AM
> *To:* A...
> *Subject:* Re: [AT91SAM] Minimal system for at91sam9*
>
> Hi,
>
> 16/32 MB of SDRAM should be perfect.
> Try using 8/16MB of serial data flash instead of NOR flash.I think AT91sam9
> is capable of booting from dataflash.
> TVRPrasad
>
> On Mon, Nov 9, 2009 at 5:51 PM, M P wrote:
>
>> I'm looking into running a minimal at91sam9 . I've been trying to
>> figure out how much minimal resources it would need to be reliable.
>>
>> + 16 or 32B SDRAM for linux ?
>> + 2 MB NOR for u-boot(?)+kernel+initrd
>>
>> Can I do away with NAND ? Is the sam9 capable of booting NOR directly ?
>>
>> Anyone did that before ?
>>
> Start a New Thread

Hi,

take a look at PROPOX.

http://www.propox.com/products/t_232.html

Regards Noel.

________________________________

From: A... [mailto:A...] On Behalf
Of M P
Sent: 10Nov09 10:07
To: A...
Subject: Re: [AT91SAM] Minimal system for at91sam9*

Thanks guys; so it seems it's a better deal to boot from NAND directly.

Does anyone know of a devboard (apart from the -EK) using the G20 in
that "minimalist" spirit ?

Michael
On Tue, Nov 10, 2009 at 2:21 AM, Chen, Weiguo (GE, Research)
> wrote:

Yes, If you boot on embedded ROM. it supports dataflash (not
Atmel's at25/26df series), nandflash, SD.

Weiguo

________________________________

From: A...
[mailto:A... ] On
Behalf Of vishnu Tadepalli
Sent: Tuesday, November 10, 2009 9:11 AM
To: A...
Subject: Re: [AT91SAM] Minimal system for at91sam9*

Hi,

16/32 MB of SDRAM should be perfect.
Try using 8/16MB of serial data flash instead of NOR flash.I
think AT91sam9 is capable of booting from dataflash.

TVRPrasad

On Mon, Nov 9, 2009 at 5:51 PM, M P > wrote:

I'm looking into running a minimal at91sam9 . I've been
trying to
figure out how much minimal resources it would need to
be reliable.

+ 16 or 32B SDRAM for linux ?
+ 2 MB NOR for u-boot(?)+kernel+initrd

Can I do away with NAND ? Is the sam9 capable of booting
NOR directly ?

Anyone did that before ? Start a New Thread

On Tue, 10 Nov 2009 04:42:10 -0000
"gnuarm" wrote:
> I suggest that you research this in the errata. I remember that the
> earlier SAM9 parts could not boot from several devices that were
> listed as boot devices in the data sheets.

Yes. We had this problem with AT91SAM9261 parts. We had to find "B"
revision parts to boot off the NAND.

Dan
Start a New Thread

Hi guys...

Why using nand seems to be prefered than using dataflash?
Speed?

PSilva

Dan Lyke escreveu:
>
> On Tue, 10 Nov 2009 04:42:10 -0000
> "gnuarm" > wrote:
> > I suggest that you research this in the errata. I remember that the
> > earlier SAM9 parts could not boot from several devices that were
> > listed as boot devices in the data sheets.
>
> Yes. We had this problem with AT91SAM9261 parts. We had to find "B"
> revision parts to boot off the NAND.
>
> Dan

Start a New Thread

What do you mean by "dataflash" ? SPI ? Well SPI ones are tiny,
compared to the gigantic NAND you can get for cheap...

Michael

On Tue, Nov 10, 2009 at 4:07 PM, Paulo Silva(OpenSoftware)
wrote:
> Hi guys...
>
> Why using nand seems to be prefered than using dataflash?
> Speed?
>
> PSilva
>
> Dan Lyke escreveu:
>>
>> On Tue, 10 Nov 2009 04:42:10 -0000
>> "gnuarm" > wrote:
>> > I suggest that you research this in the errata. I remember that the
>> > earlier SAM9 parts could not boot from several devices that were
>> > listed as boot devices in the data sheets.
>>
>> Yes. We had this problem with AT91SAM9261 parts. We had to find "B"
>> revision parts to boot off the NAND.
>>
>> Dan
> Start a New Thread