Write function for 16 bit NAND Flash

Write function for 16 bit NAND Flash

[Shen Aaron-r62966]

Hi,

  I'm investigating to write boot code into an empty 16 bit NAND Flash. I met some problem, and if you have some experience, please be kindly to share with me.

  The current write program is for 8 bit NAND Flash(Samsung K9F5608Q0C) and is loaded by AXD. The flash is 32 page per block and 528(512+16) byte per page.  I use int type pointer to copy the boot data into the main area buffer of the flash. It's successful as I read back the data from the flash to verify.

  As the 16 bit NAND Flash(Samsung K9F5616Q0C) is also 32 page per block but 264(256+8) word per page, I try to use short int type pointer to copy. The data has truly been copied into the main area buffer of the flash. But after I read back it from the flash, it seems to be all 0xFFFF. Seems the data are not writen into the flash at all.

  Any comments and suggestion?

Thanks.
-Aaron.
  

Re: Write function for 16 bit NAND Flash

[Thomas Gleixner]

On Friday 23 April 2004 05:43, Shen Aaron-r62966 wrote:
> Hi,
>
>   I'm investigating to write boot code into an empty 16 bit NAND Flash. I
> met some problem, and if you have some experience, please be kindly to
> share with me.
>
>   The current write program is for 8 bit NAND Flash(Samsung K9F5608Q0C) and
> is loaded by AXD. The flash is 32 page per block and 528(512+16) byte per
> page.  I use int type pointer to copy the boot data into the main area
> buffer of the flash. It's successful as I read back the data from the flash
> to verify.

int type pointer ? Surprise, surprise. Is the buswitdh set to 32 bit ?

>   As the 16 bit NAND Flash(Samsung K9F5616Q0C) is also 32 page per block
> but 264(256+8) word per page, I try to use short int type pointer to copy.
> The data has truly been copied into the main area buffer of the flash. But
> after I read back it from the flash, it seems to be all 0xFFFF. Seems the
> data are not writen into the flash at all.

Hmm. How do you apply the commands to the chip ?

-- 
Thomas
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