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maddy

United Kingdom
8 Posts
Posted - 06/05/2009 :  12:22:54  Show Profile
i have a GQ-4X which i got to programme spi chips the problem is i was using spansion s25fl016a soic8 chips which i can no longer get i have some sst25vf016b soic 8 chips which are compatible but when i programme them they dont boot up properly. i think they might have to be offset but dont know for sure. any help please
Reply #1

ZLM

2945 Posts
Posted - 06/05/2009 :  19:26:59  Show Profile
They should be read compatible. Is it the chip been write correctly?
Check you data file is correct too.
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Reply #2

maddy

United Kingdom
8 Posts
Posted - 06/06/2009 :  04:50:02  Show Profile
when i write the same flash to both they both verify ok but the sst25vf016b doesnt work when put back in to project
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Reply #3

ZLM

2945 Posts
Posted - 06/06/2009 :  08:10:57  Show Profile
Some motherboard will check the device ID before boot.

Checked the datasheet on both chips, and they should compatible on reading.

OR, there are hardware compatibility not good enough on your project.
You have to check the datasheet and see what are at the differences on hardware DC CHARACTERISTICS.
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Reply #4

maddy

United Kingdom
8 Posts
Posted - 06/06/2009 :  10:30:55  Show Profile
wrote to a blank chip then read it with another program and got the following

SPI flash ID 0xbf2541, size 0x00200000, block size 0x00008000

does this mean i have to offset my GQ-4X in anyway
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Reply #5

ZLM

2945 Posts
Posted - 06/06/2009 :  21:09:35  Show Profile
No, you do not need to set the offset.

The size says the chips capacity. which is correct. The block size is chip internal sector size. Nothing to do with the offset.

But your data file shoulde have size same as the chip. 0x00200000, if your data file has a different size, then it may not be correct data file.
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Reply #6

maddy

United Kingdom
8 Posts
Posted - 06/07/2009 :  01:35:46  Show Profile
thanks for all your help will let you know how i get on during the week
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