In a continuing investigation of a driver board, can a rough evaluation of a micro-controller chip be done by testing each pin relative to the ground pin for resistance with the chip removed from the board? Am using an ohm meter with a max voltage of 1.4 volts. Could this test damage the micro-controller?
Here are the results of the test. The ground pin is pin 5 and the pin for normally supply voltage is pin 14. Attached is the document for the PIC16F628 micro-controller if needed.
Here are the results of the test. The ground pin is pin 5 and the pin for normally supply voltage is pin 14. Attached is the document for the PIC16F628 micro-controller if needed.
Resistance Measurements with neg probe at Pin 5 | ||||
(ohms) | IC off board | 1.455 VDC | ||
U14 | PIC16F628-047P | |||
Pin | ohms | Pin | ohms | |
1 | 0 | 18 | 500 | |
2 | 500 | 17 | 500 | |
3 | infin | 16 | 500 | |
4 | infin | 15 | 500 | |
5 | 14 | 350 | ||
6 | 500 | 13 | infin | |
7 | 500 | 12 | 50 | |
8 | 500 | 11 | 500 | |
9 | 500 | 10 | 500 |
Attachments
-
2.6 MB Views: 8