26f016B BF-26-41, reads ID 2 times then become FF 26f016B, BF-26-41

waynehorner

I have this chip that I am having weird issues reading.I have a xgecu tl866II-PLUS reader






I tell it to read and it checks the ID BF 26 41 it agrees

and says that it reads



Then I try verify.
This time it got the ID correct but usually ID becomes FF FF FF and I have to replug to get it right again. So I verify some values and now I am getting bytes other than FF.




Then if I try to verify again the ID becomes FF FF FF
The data read in was all FF.
But if I remove the zif socket and plug it back in it gets the right ID again.
But still wont verify.

This chip has SPI and SQI modes. I'm not sure what that means.
I suspect that the chip isnt being read right by the programmer.
Maybe timing or voltage or handshake is wrong...


Data is all FF




weird.
Read once.. appears to work.
Re-read of verify and ID becomes FF
If you replug ID comes back
but read is all FF and verify is not FF

What the heck?
maybe I need a new config for this chip....

Any ideas ?

Albano.Matos

I have this chip that I am having weird issues reading.I have a xgecu tl866II-PLUS reader





...
waynehorner 发表于 2022-6-17 03:54

As an User....  I cannot see the images you post, but you describe the problem very well.Have you tried to lower/change the SPI clock speed at bottom right?
The 26V016B it's indeed an SST26VF016B , the JEDEC-ID shows correct, when it shows...
Hope you are using Xgrpro 12.01.

Other issues: Bad contact in adapter (Chip side or adapter side), usb cable faulty,
any lock the IC may have programed to avoid reading/copying ,
any software bug (if Yes, ADMIN will help, hopefully)