BlackFin BF531 and MT48LC4M16

 Hello,

this is a question to guys with some experience with AD BlackFin BF531 (or
BF533) - normally I would ask on blackfin.org, but it was shut down some
time ago...

Anyway... I've connected MT46LC4M16 (1 Meg x 16 x 4 banks) SDRAM to my
BF531, I've initialized it (although I'm not sure about those settings),
but I got some issues with it. According to datasheet of BF531 the smallest
possible 'bank size' should be 16 MB, my MT48LC4M16 is only 8 MB... So my
questions is: has anybody successfully used BF531 (or BF533) with this
SDRAM? 

Best regards, 
 Jookie	   
					
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Jookie wrote:

>  Hello,
> 
> this is a question to guys with some experience with AD BlackFin BF531 (or
> BF533) - normally I would ask on blackfin.org, but it was shut down some
> time ago...
> 
> Anyway... I've connected MT46LC4M16 (1 Meg x 16 x 4 banks) SDRAM to my
> BF531, I've initialized it (although I'm not sure about those settings),
> but I got some issues with it. According to datasheet of BF531 the smallest
> possible 'bank size' should be 16 MB, my MT48LC4M16 is only 8 MB... So my
> questions is: has anybody successfully used BF531 (or BF533) with this
> SDRAM? 

I haven't use BF531 with this particular SDRAM; however 1M x 16 x 4 is 
standard configuration and there should be no problem. Bank size field 
in SDRAM controller only controls the allowed address range for access.

Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com

  Hello Vladimir,

thank you for your answer. I'm still not sure if the SDRAM controler inside
the BF531 can do it, so I've wrote an e-mail do AD technical support - I
will see if I will get an answer and what it will be :)

  Best regards,
  Jookie


>I haven't use BF531 with this particular SDRAM; however 1M x 16 x 4 is 
>standard configuration and there should be no problem. Bank size field 
>in SDRAM controller only controls the allowed address range for access.
>
>Vladimir Vassilevsky
>DSP and Mixed Signal Design Consultant
>http://www.abvolt.com
>	   
					
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Posted through http://www.EmbeddedRelated.com

The answer is: RTFM
Namely EN-210

VLV


Jookie wrote:

>   Hello Vladimir,
> 
> thank you for your answer. I'm still not sure if the SDRAM controler inside
> the BF531 can do it, so I've wrote an e-mail do AD technical support - I
> will see if I will get an answer and what it will be :)
> 
>   Best regards,
>   Jookie
> 
> 
> 
>>I haven't use BF531 with this particular SDRAM; however 1M x 16 x 4 is 
>>standard configuration and there should be no problem. Bank size field 
>>in SDRAM controller only controls the allowed address range for access.
>>
>>Vladimir Vassilevsky
>>DSP and Mixed Signal Design Consultant
>>http://www.abvolt.com
>>	   
> 
> 					
> ---------------------------------------		
> Posted through http://www.EmbeddedRelated.com

Vladimir Vassilevsky <nospam@nowhere.com> wrote in
news:l7ednQaiHK9LayjWnZ2dnUVZ_sydnZ2d@giganews.com: 

> 
> 
> Jookie wrote:
> 
>>  Hello,
>> 
>> this is a question to guys with some experience with AD BlackFin BF531
>> (or BF533) - normally I would ask on blackfin.org, but it was shut down
>> some time ago...

Blackfin.org is quiet but there is very active support for Blackfin on the 
ADI site.

http://ez.analog.com/community/blackfin-processors?view=discussions&start=0


Al Clark
www.danvillesignal.com

Vladimir,

I've checked the FM, and it made me go through the datasheet of MT48LC4M16
again. I've found that the page size of that SDRAM is 256 B and the BF531
supports page size 512 B or more, so that might be one of those problems I
have (anyway, I got some data from that working). So now I'll wait for the
final word from Analog and see if they got any recommendations.

Jookie


>The answer is: RTFM
>Namely EN-210
>
>VLV
	   
					
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Posted through http://www.EmbeddedRelated.com

Jookie wrote:

> Vladimir,
> 
> I've checked the FM, and it made me go through the datasheet of MT48LC4M16
> again. I've found that the page size of that SDRAM is 256 B and the BF531
> supports page size 512 B or more,

Then you are out of luck.

VLV

>Then you are out of luck.

Well, not realy, I just need to replace it with a different one. I've took
a look and the MT48LC16M16 (32 MB) is pin compatible with my MT48LC4M16 (8
MB), it has just one more address pin connected (will connect that missing
pin with wire), so it will be no bit deal :)	   
					
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Posted through http://www.EmbeddedRelated.com

"Jookie" <joo@n_o_s_p_a_m.kie.sk> wrote in news:dIGdneTct-
lLeSXWnZ2dnUVZ_rqdnZ2d@giganews.com:

>>Then you are out of luck.
> 
> Well, not realy, I just need to replace it with a different one. I've took
> a look and the MT48LC16M16 (32 MB) is pin compatible with my MT48LC4M16 (8
> MB), it has just one more address pin connected (will connect that missing
> pin with wire), so it will be no bit deal :)        
>                          
> ---------------------------------------          
> Posted through http://www.EmbeddedRelated.com
> 

We use the MT48LC4M16A2P-7E IT:G with a BF532. I would lay iy out for the 
larger part. This gives you a universal footprint.

Al Clark
www.danvillesignal.com 

>We use the MT48LC4M16A2P-7E IT:G with a BF532. I would lay iy out for the

>larger part. This gives you a universal footprint.

Al, do you got it working all ok? Because I have the feeling from the
manuals that there might be some issues with it.

My SDRAM setup looks like this:
*pEBIU_SDRRC =  0x00000816;
*pEBIU_SDBCTL = 0x00000001;
*pEBIU_SDGCTL = 0x00911149;

Jookie	   
					
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