about mess storage in STR7

liyong · ‎2006-09-18

Posted on September 19, 2006 at 06:29

liyong · ‎2006-09-17

Posted on September 18, 2006 at 00:11

I use STR7's USB as mess storage , and I use extern flash memory(MX29LV640BB-90) as the medium memory,some time I can copy file to this disk, but some time , the PC will show '' the path is too deep'' or ''the parameter is not right'', can not copy file into this disk ? why? :-(

anis23 · ‎2006-09-18

Posted on September 19, 2006 at 06:29

Hi liyong,

To implement a real Mass Storage application with a Flash memory medium the NAND Flash technology is more appropriate than the NOR Flash technology... The NAND Flash is based on a small block size (512 or 2k bytes) and itâ€™s dedicated to data store operation.

However the NOR Flash (like the MX29LV640BB-90) is dedicated to store code and it based on big block size (8k, 32k or 64k bytes) with a large erase time. So to write 512 bytes of data in this kind of flash, you have to erase a whole block and the erase time can exceed the windows timeout (this timeout depends on the windows version)... In this situation window is enable to copy the file in the medium...

Regards,

AnisAs.