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error on write firmware

m.beta

Jan 14, 2023
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Jan 14, 2023
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please i realy need help
i have a nand flash GD5F1GQ5UEYIG from gigadevice company
the originale fille writed on the nand it's size is 139MB
but where i try to write it on other memorys it's write just 135MB and i try many other models but always the same problem only 135MB realy writed
can any one explain it why
 

kellys_eye

Jun 25, 2010
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Could depend on how they have defined 1Mb. Some use 1000kb (wrong), others use 1024kb (correct).

135Mb (at 1000kb per Mb) x 1.024 = 138.24Mb.
 

m.beta

Jan 14, 2023
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Jan 14, 2023
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Could depend on how they have defined 1Mb. Some use 1000kb (wrong), others use 1024kb (correct).

135Mb (at 1000kb per Mb) x 1.024 = 138.24
The nand size is 01Gb
But when I write any file and try to read it again I found 135MB Again
 

Harald Kapp

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Nov 17, 2011
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Which format does the data in the file have? Sme formats contain additional error checking codes or checksums in addition to the data. Thie additional data (codes) is not part of the data written to the FLASH, this may also explain the difference.
 
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