Hi,
I checked the voltage on the IRQ pin, using two different 12V (assumed) power sources (one 10.73V, and the other one 18.84V). In both cases, just after turning the board on, the IRQ pin had less than 1.0V, and when PROG08SZ is run (trying to connect to the board for programming) the IRQ pin shows 7.78V with both power sources. Could that be the problem ? Should the voltage there be higher ?
About the coding (I only code in Assembly, not C), I have never used any special self-erasure technique, mostly because I don't know how to do that
Is there any method I can use to alter the reset vector back to FFFF ?
Hope to hear from you guys soon .....
Thanks.
F4