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How to use 64M SDRAM in BF533 system?

Question asked by HelloTom on Apr 13, 2010
Latest reply on Apr 14, 2010 by HelloTom

Hi,
       Everybody.


        I have designed a product based on BF533. I use the schematics in document ADSP-BF533 EZ-KIT Lite Manual.pdf to attach the MT48LC32M16A2 to BF533. As you know, the EZ-KIT Lite use MT48LC16M16A2. the two SDRAM have different size.

In my program, I initiate the sdram with code:
" *pEBIU_SDBCTL = 0x00000025; " // 10 bit column address. 64M sdram.
and in the project options ,I select the extern memory size to 64M.

after do these. I copy the talkthrough code to my project.
But, the sound outputed has some noise.

If I do not initialize the sdram,and the extern memory size is set to 32M in the project options . the talkthrougn works well.

I was confused.
would you please help me out the problem?
thanks a lot.
fishbaby2007@gmail.com
      TOM

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