Today in class 2 of my students were attempting to program TIMER1 and ended up with a PIC that would not ID. We swapped to another Junebug and the same thing happened to its target chip.
PICKit2 software shows No Device Found and No Device Detected. Swap in a good 18F1320 and all is well. When I move a bad chip between Junebugs the problem follows the chip.
We were using connector 8 hooked to a breadboard with LEDs on it. Given that the only signals on that connector other then the port bits is VDD and GND I do not see how that could damage the PIC to the point it would ID itself. There was not other power to the breadboard. At all times only the top 3 DIP switches were on.
What can no do to a 18F1320 to make it non responsive? I know it is a broad question.
PICKit2 software shows No Device Found and No Device Detected. Swap in a good 18F1320 and all is well. When I move a bad chip between Junebugs the problem follows the chip.
We were using connector 8 hooked to a breadboard with LEDs on it. Given that the only signals on that connector other then the port bits is VDD and GND I do not see how that could damage the PIC to the point it would ID itself. There was not other power to the breadboard. At all times only the top 3 DIP switches were on.
What can no do to a 18F1320 to make it non responsive? I know it is a broad question.