[ECOS] RE: Help required in rebuiliding redboot

[ECOS] RE: Help required in rebuiliding redboot

[Vanitha Ramaswami]

Hi All,

Sorry for my previous posting. I just now saw the Data sheet of the SDRAM 
we are using in our customized board. We are using 2 units of 32M16 
configuration. So i believe i should use the constant SDRAM_CONFIG_2x32Mx16 
.

How do i set the IXP425_SDRAM_REFRESH_CNT value ? For the Micron SDRAM, 
that we are using it is specified as 8 K. In the grg eval board, this is 
set as 0x81A. How do i calculate ths Refresh count for my SDRAM.

Thanks
Vanitha

On Wednesday, September 01, 2004 1:46 PM, Vanitha Ramaswami 
[SMTP:vanitha@agilis.st.com.sg] wrote:
> Hi All,
>
> I need to modify redboot for a customized board based on the ADI Coyote 
reference platform.
> I have 128 MB of SDRAM in the customized target board. It has 2 pieces of 
8Meg x 16 x 4 banks.
> Can you tell me what should i use for the IXP425_SDRAM_CONFIG_INIT 
variable ?
>
> If i use the constant #define SDRAM_CONFIG_4x8Mx16 , then this will 
account only for 64 MB of SDRAM. How should i specify for the two 64 MB   
chips ?
>
> Should i use any any one of the below constants.?
> #define SDRAM_CONFIG_4x16Mx16      3
> #define SDRAM_CONFIG_2x32Mx16      4
>
> Thanks
> Vanitha
>
> 

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