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Ixiasoft
3.7.1. Power Measurement
To measure the actual power of the FPGA, there are test pads on the board to be used as probe points for multi-meter probes. You can measure the current and using the equation P = R x I2. (Power = Resistance x Current Squared), calculate the power dissipation.
Test pads TP2 and TP3 measure the current consumed by the FPGA core. Test pads TP4 and TP5 measure the current consumed by all of the FPGA's I/O banks. All the other test pads are used to verify the voltage levels of various nodes on the board.
Test Pad #’s | Measuring | Description | Expected Value |
---|---|---|---|
TP1 | Board input voltage | Verify the USB input voltage | 5.0 Ω |
TP2 - TP3 | FPGA core current | Power calculation for FPGA Vcc-core power consumption. Resistor R1 = 0.1 Ω. Current measured by user's multi-meter. | -mW |
TP4 - TP5 | FPGA I/O current | Power calculation for FPGA Vcc-io power consumption. Resistor R4 = 0.1 Ω. Current measured by user's multi-meter. | -mW |
TP6 | Analog voltage | Verify the proper voltage required by the FPGA Vcca inputs | 3.3 V |
TP7 | Analog GND | Verify the proper voltage required by the FPGA ADC IP block GND inputs | 0 V |
TP8 | Digital GND | Verify the proper voltage required by the FPGA digital GND inputs | 0 V |
TP9 | Digital GND | Verify the proper voltage required by the FPGA digital GND inputs | 0 V |