I have a design with ADuC842 that has worked for many years. Recently after using this ADuC842 several times, it now reports a WSD error 6 when attempting to download new code. I also notice that the MCU now reports itself as an ADuC843 device. What happened? Is there some DATA bytes that I inadvertently erased that might cause this problem?
Here is the resulting string that is captured in HyperTerminal window when the MCU is reset with PSEN held LOW:
ADI 843 V212
This used to say:
ADI 842 V217
From what source did you purchase this specific parts?
Has it been from a official ADI distributor?