Cyclone V SoC FPGA Development Board Reference Manual - Altera

Chapter 2: Board Components 2–51Power SupplyPower MeasurementFigure 2–11. Power Measurement CircuitThere are seven power supply rails that have on-board current sense capabilitiesusing 16-bit differential ADC devices. Precision sense resistors split the ADC devicesand rails from the primary supply plane for the ADC to measure current. A SPI busconnects these ADC devices to the FPGA, HPS, and MAX V CPLD 5M2210 SystemController.Figure 2–11 shows the block diagram for the power measurement circuitry.EmbeddedUSB-Blaster IISupply#0-6FeedbackR SENSEPower Supply Load #0-6EPM570JTAG ChainUSBPHYTo User PC8 Ch.SCKDSIDSOCSnSPI BusMAX V CPLD5M2210SystemControllerCyclone VSoCE 14-pinRW 2x16RS CharacterD(0:7) LCDTable 2–40. Power Measurement RailsTable 2–40 lists the targeted rails. The schematic signal name column specifies thename of the rail being measured while the device pin column specifies the devicesattached to the rail.Channel Schematic Signal Name Voltage (V) Device Pin Description0 1.1V_HPS 1.1 VCC_HPS HPS core power1 1.5V_HPS 1.5 VCCIO6A_HPS I/O and DDR3 devicesVCCIO7A_HPS2 3.3V_HPS 3.3VCCIO7B_HPSVCCIO7C_HPSI/O and HPS peripheral devicesVCCIO7D_HPS3 2.5V_HPS 2.5 VCCPD6A6B_HPS I/O, HPS internal and peripheral devices4 1.1V_VCC 1.1 VCC FPGA core power, transceiver, and clock5 1.5V_FPGA 1.56 2.5V_FPGA 2.5VCCIO3BVCCIO4AVCCIO5AVCCIO5BVCCIO8AI/O and DDR3 devicesI/O, FPGA internal and peripheral devicesNovember 2013 Altera Corporation Cyclone V SoC Development BoardReference Manual