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-----I reduce voltage on 7805 output from 5V to 4.3 and: Pin5(DATA2): 3.7V Pin3-7-8(Vcc2):3.1V No change with or without chip insert. same voltages. -----I reduce voltage on 7805 output from 5V to 3.6 and: Pin5(DATA2): 3V Pin3-7-8(Vcc2):3.5V (no mod used) no voltage change with or without chip eithe...

trying to find any errors here are my results: with no chip in socket and vcc enable using mod with 4 diodes : vcc (pins 3-7-8): 2.62 V pin5 : 4.36 V when i insert the chip , vcc will increase to 3.56 V ! I noticed that when i put in socket ONLY THE 2 chip pins 5-8 this increase vcc voltage to 3.56 ...

ok i see....

I apply the mod to the socket 25Cxxx.
i used 2-3-4 diodes...

same errors always...

do i have a damaged socket?
i have designed the pcb by hand so maybe there is any mistake...

anyway to test the socket?
thank you.

Still the same errors with 0.98d12c3. while trying to erase: Erase completed by check DQ0(0.00 Sec). and blank verify: Device is NOT Empty($000004). Also error trying to verify after programming. Reading chip contents completed successfully but files are not equal and of course chip is not working. ...

Hello, I am trying to program an SST25VF080 with willem pcb3b. Using software 0.97ja has no option for this chip. So, i gave a try to 0.98d11 although i know that it doesn't support pcb3b. First of all i use a zener to achieve 3.3V Vcc. No other modification. 0.98d11 recognized the chip as: http://i...