New Contributortroubleshoot for 5CSEBA4U23I7N (cyclone V fpga processor)
Hello,
I am trying to troubleshoot a pcb with a 5CSEBA4U23I7N cyclone V fpga processor.
The resistance value I measured between 3V3 and GND for the intact pcb is around 380ohm.
One of the PCBs is drawing more current than normal. When I measure the resistance between 3V3 and GND, it is about 141 ohms.
Then I removed the fpga from the pcb and continued the tests in this way.
I measured the short circuit status of all the pins I used as 3V3 supply in the fpga. Accordingly, the resistance values of some pins are as follows:
| FPGA PIN 1 | FPGA PIN 2 | Value (OHM) |
| C1 (GND) | AG4 (3V3) | 212 OHM |
| C1 (GND) | AE10 (3V3) | 212 OHM |
| C1 (GND) | AE13 (3V3) | 212 OHM |
| C1 (GND) | AA12 (3V3) | 212 OHM |
| C1 (GND) | V11 (DATA) | 215 OHM |
According to these values, is the resistance value I measured between the VCC pin of the fpga and the GND pin normal?
If there is a malfunction, what could be the cause? Or how should I proceed?
Note
Below are the measurement results I made with the fpga I removed from a different pcb. Similar results were obtained here.
| FPGA PIN 1 (GND) | FPGA PIN 2 (3V3) | Value (OHM) |
| C1 | AG4 | 291 OHM |
| C1 | AE10 | 291 OHM |
| C1 | AE13 | 291 OHM |
| C1 | AA12 | 291 OHM |
| C1 | V11 | 291 OHM |
| C1 | AA14 | 328 OHM |
| C1 | AD13 | 328 OHM |
| C1 | AD9 | 328 OHM |
| C1 | AD16 | 328 OHM |
| C1 | AD18 | 328 OHM |
| C1 | AD21 | 328 OHM |
