Hi, I’m trying to buy some winbond chips, just to be safe. I’m lucky and my H97M-E motherboard has a Winbond 25Q64FVAIQ like this one (the pakage type is PDIP-8):
So i do not have to solder any cable in case of bad flash, I just need to remove my chip and restore my old dump with my raspberry pi. Btw, you can be careful as much as you want, but removing and inserting multiple times will damage the chip eventually, so I’d like to buy some backup chips.
I found some cheap 25Q64FVAIQ here …aliexpress really long links… but the shipping time is 1-2 months . I can’t find European stores with that chip available, but I found a lot of 25Q64FVAIG and 25Q64FVAIF…
From here https://www.pjrc.com/store/w25q64fv.pdf?page=86 (pages 86 and 87) you can read about winbond naming rules, so:
- The only PDIP-8 chips inside the 25Q64FV family are: 25Q64FVAIG, 25Q64FVAIQ, 25Q64FVAIF (also called W25Q64FVDAIG, W25Q64FVDAIQ, W25Q64FVDAIF)
- The final G stand for: Green Package (Lead-free, RoHS Compliant, Halogen-free (TBBA), Antimony-Oxide-free Sb2O3)
- The final F stand for: Green Package with Fast Sector Erase time (tSE)
- The final Q stand for: Green Package with QE=1 in Status Register 2
I need this one Winbond 25Q64FVAIQ (W25Q64FVDAIQ), can I use the other 2 variants? are there compatibility issues?
Ok in the same pdf (page 13), I found that QE stands for “Quad Enable”, that flag (factory set, non-overridable) enable Quad SPI instructions, ence it changes some pin functionalities, btw the protocol is still the same SPI… the real question now is, do the chip controller (if any, or whatever thing communicate with the chip) expect the chip to work as Quad SPI or it read the status and work accordingly?
I bought a lot (5 chips) anyway, let’s wait 1,5 month yay! btw I’m still interested about the compatibility with the F and G versions.
UPDATE #4: (10/10/2016)
Chips have arrived!!!.. aaaand… They send me the wrong ones… 25Q64BVAIG instead of 25Q64FVAIQ…Guys, can you pls help me to find these chips somewhere in europe? Or at least from another store that isn’t aliexpress.
UPDATE #5: (15/10/2016)
Bought new chips… let’s hope for the best…
UPDATE #6: (11/03/2017)
Chips arrived months ago but they send me the wrongs ones again… -.-"… Btw I’ve done a nice “mod” to my motherboard/bioschip-socket so I do not have to remove my chips multiple times to flash it and I do not have to solder any cables directly to the motherboard (I’ll upload some pictures soon
w25q64fv.pdf (1.23 MB)