Re: Memory Controller

Hello Salem,

Yes if we are going to use SDRAM memory (I think we will need SDRAM for
main memory of system, SSRAM will be used for cache and Flash for
booting and other apllications...) then we need to model that also.

I have studied and downloaded the SSRAM datasheet and model from Micron
website, we have 2 design our own SSRAM interface we cannot use the
opencores interface.

-Regards,
Saoban



Mohamed Salem wrote:
> 
> Soban ,
> I have to let you know that the SOPC of Altera Board has the APEX device
> as its core . The memory section describes the memory on the board as
> follows :
> ==========
> Memory
> 
> **To support processor functions implemented in the APEX device, the
> 
> board includes a memory system consisting of the following:
> 
> * Non- Volatile memory: 64 Mbytes of synchronous DRAM, organized as
> 
> 8 Mbytes 64 Mbytes
> 
> * Non-volatile memory: 4 Mbytes Flash memory and a 256-Kbyte
> 
> EPROM memory
> 
> * Pipelined cache memory with burst SRAM organized as
> 
> 256 Kbytes 32 Kbytes.
> ==========
> most likely we will need an SDRAM memory model if this is the case as
> mentioned above . What do u think in the light of the aforementioned
> info about the board memories .
> Waiting for your comments ..
> 
> Thanks ..
> Best Regards,
> 
>         Mohamed A. Salem
> 
> On Thu, 2003-07-10 at 22:13, Soban Shoeb Chawre wrote:
> > Hello All,
> >
> > The core for SRAM controller in the openrisc soc is meant for SRAM
> > memory bank that is there on XESS board.
> >
> > We will b porting the design on the Altera SOPC board which has Micron
> > SSRAM MT8L256L32DT
> >
> > If any 1 of u can plz give me links for the datasheet (have searched at
> > micron website...).
> >
> > Regards,
> > -Soban
> > -------------------------------------------------------------------
> > "Allaahummaa laa aa'ishaa illal  aa'ish-ul-aakhiraah.
> >  Fagfiral Ansaaraa wal muhaajiraah."
> > -------------------------------------------------------------------
> >
> >
> >
> >
> >
> > Mohamed Salem wrote:
> > >
> > > Hi all ,
> > >         This message is addressing starting a technical aggressive plan to get
> > > the Memory controller part of OFOQ working asap.
> > >
> > > PLease , Have a look right now on the block diagram of the system in
> > > page 5 of the specs.
> > >
> > >         The objective is to :
> > >
> > > Integrate the memory controller IP core of (opencores) with the
> > > SRAM/FLASH from one side, and to the Wish-bone Interface from the other
> > > side (as shown in the diagram).
> > >         Then the wish-bone is interfacing with the openRisc CPU ..
> > > We need to choose a SRAM/FLASG model to be used in testing.
> > >         We need to be at first to be as simple as possible until we verify the
> > > concept then we can start complicating the components.
> > >         We need also to test the whole flow and communication between all
> > > involved components with a test bench for this purpose.
> > >
> > > {{OpenRISC <==> Wish-Bone <<==>> Memory controller <<===>>SRAM/FLASH..}}
> > >
> > > We need to study the features of the memory controller and how to
> > > connect it to the other system parts. The cores are available, what we
> > > need is to think how to STITCH them and then with a test bench check the
> > > flow of data and communication between those system parts.
> > >
> > > Interested peers in this part should push the flow ..
> > >
> > > Guys , I'll drive a very tight plan for OFOQ in the next few months.
> > > Active interested guys who were  waiting, please show up .. We wanna
> > > come out with it as soon as possible .. Many folks around are waiting
> > > for a REAL working prototype for OFOQ PDA..
> > >
> > > Best Regards,
> > >
> > >         Mohamed A. Salem...
> > >
> > > --
> > > Mohamed A Salem
> > > Handasa Arabia Organization
> > > www.handasarabia.org
> > >
> > > ---------------------------------------------------------------------
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> > > For additional commands, e-mail: [email protected]
> > > Handasa Arabia, http://www.handasarabia.org
> --
> Mohamed A Salem
> Handasa Arabia Organization
> www.handasarabia.org