Futterama
Member
Hello,
I was just improving my PIC programmer hardware, and suddenly it seems like the MCLR pin is kept low on a PIC16F628 (short circuit inside the PIC?).
If I connect 12V to the MCLR, and GND to GND with no other pins connected (not even Vdd), heavy current will run through the MCLR pin (>250mA and probably more if my power supply didn't have current limit). The voltage on the MCLR pin will only rise to approx. 2V.
If I connect the PIC to 5V supply and GND (no MCLR connected) the program in the PIC will run fine.
What happened to the PIC?
If it makes a difference, the PIC was obtained as a sample from Microchip.
Regards,
Futterama
I was just improving my PIC programmer hardware, and suddenly it seems like the MCLR pin is kept low on a PIC16F628 (short circuit inside the PIC?).
If I connect 12V to the MCLR, and GND to GND with no other pins connected (not even Vdd), heavy current will run through the MCLR pin (>250mA and probably more if my power supply didn't have current limit). The voltage on the MCLR pin will only rise to approx. 2V.
If I connect the PIC to 5V supply and GND (no MCLR connected) the program in the PIC will run fine.
What happened to the PIC?
If it makes a difference, the PIC was obtained as a sample from Microchip.
Regards,
Futterama