4 GByte RAM?

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mike.ma...@gmail.com

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May 17, 2018, 1:44:35 AM5/17/18
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Hi,

according to the schematics there is a RAM-module with 4 GByte available on the BBB (and also on the BBG). Why are there only 512 MBytes available for the CPU - aren't enough address lines used? Or what else is the reason?

Kind regards

Mike


Rick Mann

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May 17, 2018, 4:47:41 AM5/17/18
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That's eMMC flash, not RAM. It's accessed like a disk.
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Rick Mann
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Mike Maikaefer

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May 17, 2018, 6:19:09 AM5/17/18
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No, when you check out the BOM or the schematic, you will find 4GB DDR3 RAM (which is not the eMMC).

On Thu, May 17, 2018 at 10:47 AM, Rick Mann <rm...@latencyzero.com> wrote:
That's eMMC flash, not RAM. It's accessed like a disk.

> On May 16, 2018, at 22:44 , mike.ma...@gmail.com wrote:
>
> Hi,
>
> according to the schematics there is a RAM-module with 4 GByte available on the BBB (and also on the BBG). Why are there only 512 MBytes available for the CPU - aren't enough address lines used? Or what else is the reason?
>
> Kind regards
>
> Mike
>
>
>
> --
> For more options, visit http://beagleboard.org/discuss
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> For more options, visit https://groups.google.com/d/optout.


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Rick Mann
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Gerald Coley

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May 17, 2018, 7:26:24 AM5/17/18
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The maximum memory that is supported by the processor is 1GB. There are not enough address lines on the processor to support more than that.

 

4GB is the eMMC.

 

Gerald

 

 

From: beagl...@googlegroups.com [mailto:beagl...@googlegroups.com] On Behalf Of Mike Maikaefer
Sent: Thursday, May 17, 2018 5:19 AM
To: beagl...@googlegroups.com
Subject: Re: [beagleboard] 4 GByte RAM?

 

No, when you check out the BOM or the schematic, you will find 4GB DDR3 RAM (which is not the eMMC).

On Thu, May 17, 2018 at 10:47 AM, Rick Mann <rm...@latencyzero.com> wrote:

That's eMMC flash, not RAM. It's accessed like a disk.

> On May 16, 2018, at 22:44 , mike.ma...@gmail.com wrote:
>
> Hi,
>
> according to the schematics there is a RAM-module with 4 GByte available on the BBB (and also on the BBG). Why are there only 512 MBytes available for the CPU - aren't enough address lines used? Or what else is the reason?
>
> Kind regards
>
> Mike
>
>
>
> --
> For more options, visit http://beagleboard.org/discuss
> ---
> You received this message because you are subscribed to the Google Groups "BeagleBoard" group.

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> For more options, visit https://groups.google.com/d/optout.


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Rick Mann
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Roger Quadros

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May 17, 2018, 8:05:16 AM5/17/18
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It probably is 4Gb (Gigabit) which means 512MB.

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-roger

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

On 17/05/18 13:19, Mike Maikaefer wrote:
> No, when you check out the BOM or the schematic, you will find 4GB DDR3 RAM (which is not the eMMC).
>
> On Thu, May 17, 2018 at 10:47 AM, Rick Mann <rm...@latencyzero.com <mailto:rm...@latencyzero.com>> wrote:
>
> That's eMMC flash, not RAM. It's accessed like a disk.
>
> > On May 16, 2018, at 22:44 , mike.ma...@gmail.com <mailto:mike.ma...@gmail.com> wrote:
> >
> > Hi,
> >
> > according to the schematics there is a RAM-module with 4 GByte available on the BBB (and also on the BBG). Why are there only 512 MBytes available for the CPU - aren't enough address lines used? Or what else is the reason?
> >
> > Kind regards
> >
> > Mike
> >
> >
> >
> > --
> > For more options, visit http://beagleboard.org/discuss
> > ---
> > You received this message because you are subscribed to the Google Groups "BeagleBoard" group.
> > To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard...@googlegroups.com <mailto:beagleboard%2Bunsu...@googlegroups.com>.
> > To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/ebee7080-b740-42a2-a3ae-a23416241487%40googlegroups.com <https://groups.google.com/d/msgid/beagleboard/ebee7080-b740-42a2-a3ae-a23416241487%40googlegroups.com>.
> > For more options, visit https://groups.google.com/d/optout <https://groups.google.com/d/optout>.
>
>
> --
> Rick Mann
> rm...@latencyzero.com <mailto:rm...@latencyzero.com>
>
>
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Gerald Coley

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May 17, 2018, 8:06:59 AM5/17/18
to beagl...@googlegroups.com, Mike Maikaefer
That is correct.

Gerald


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From: 'Roger Quadros' via BeagleBoard [mailto:beagl...@googlegroups.com]
Sent: Thursday, May 17, 2018 7:05 AM
To: beagl...@googlegroups.com; Mike Maikaefer <mike.ma...@gmail.com>
Subject: Re: [beagleboard] 4 GByte RAM?

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Yiling Cao

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May 17, 2018, 8:25:53 AM5/17/18
to beagl...@googlegroups.com, Mike Maikaefer
It is a Micron 256M * 16bit DDR3 chip 

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