CY3670 programming CY2907 - verify fails 60% | Cypress Semiconductor
CY3670 programming CY2907 - verify fails 60%
It took some work finding a programmer and adapter for the CY2907 (8pin). I could not find the listed adapter CY3907 but I eventually found a used adpater CY3094. No documentation but it had jumpers on the adapter to change for CY2907(14), CY2071A, CY2907(8) and CY2292
I set it up for 2907(8) and was able to make 12 good ICs out of 25 (13 fails)
I ordered new blank ICs and so far the first 3 have failed verification. We cannot accept a 60%+ failure rate on these parts.
When comparing saved JEDEC files of the errors they are mostly idendical to the good sample but there are small mistakes. I have tried changing COM port settings from 9600 to 57600 (also changed in PC port settings) but it does not seem to make any difference. I also got into advanced settings and lowered the receive and transmit buffer "to correct connection problems". I could not find anything in the manual about Data bits, Parity, Stop, Flow and FIFO buffer. Does it matter how these are set on the PC?
I'm hoping someone can help diagnose this problem without burning through too many parts.