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Ixiasoft
4.9.4. Power Measurement
Power measurements are provided for six FPGA power rails by using an ADC and sense resistors. The sense resistors are connected in series to the power regulator output. The I2C interface of the ADC or the regulators are used to sense the voltages. The I2C are connected to the Intel® MAX® 10 device for reading the voltage. Current reading is achieved by a LTC2497 reading the voltage drop across the sense resistor and software converts the voltage readings to current for each measured rail.
The following power rails are monitored:
- VCC, VCCP (Power sensing by I2C on LTC3884)
- VCCRERAM (Sense resistor R424, monitoring via LTC2497, U28)
- VCCRL (Sense resistor R437, monitoring via LTC2497, U28)
- VCCRR (Sense resistor R450, monitoring via LTC2497, U28)
- VCCT (Sense resistor R463, monitoring via LTC2497, U28)
- VCCIO_UIB (Power sensing by I2C on EM2120L, U51)
- 3.3V (Power sensing by I2C on EM2130H, U43)
Figure 16. Power Measurement