Xilinx VC709 User Manual

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Xilinx VC709 User Manual Manual pdf 59 page image

VC709 Evaluation Board www.xilinx.com 59UG887 (v1.2.1) March 11, 2014Feature DescriptionsFMC_VADJ VoltageThe FMC VADJ rail is fixed at 1.8V (U63 VOUT B VCC1V8).Monitoring Voltage and Current6. Voltage and current monitoring and control are available for selected power railsthrough Texas Instruments' Fusion Digital Power graphical user interface. The threeonboard TI power controllers (U42 at address 52, U43 at address 53, and U64 ataddress 54) are wired to the same PMBus. The PMBus connector, J5, is provided for usewith the TI USB Interface Adapter PMBus pod (TI part number EVM USB-TO-GPIO),which can be ordered from the Texas Instruments Xilinx USB website and the associatedTI Fusion Digital Power Designer GUI also downloadable from Texas Instruments fusiontools. This is the simplest and most convenient way to monitor the voltage and currentvalues for the power rail listed in Table 1-22, Table 1-23, and Table 1-24.In each of these the three tables (one per controller), the Power Good (PG) On Threshold isthe set-point at or above which the particular rail is deemed “good”. The PG Off Thresholdis the set-point at or below which the particular rail is no longer deemed “good”. Thecontroller internally OR's these PG conditions together and drives an output PG pin highonly if all active rail PG states are “good”. The On and Off Delay and rise and fall times arerelative to when the board power on-off slide switch SW12 is turned on and off.Table 1-22 defines the voltage and current values for each power rail controlled by theUCD9248 PMBus controller at address 52 (U42).REF3012 U35 Fixed linear voltage reference XADC_VREF 1.25V 27Notes:1. See Table 1-22.2. See Table 1-23.3. See Table 1-24.4. The FMC VADJ rail is fixed at 1.8V.Table 1-21: Onboard Power System Devices (Cont’d)Device Type ReferenceDesignator Description Power RailNet NamePower RailVoltageSchematicPageTable 1-22: Power Rail Specifications for UCD9248 PMBus Controller at Address 52Shutdown Threshold (1)RailNumberRailNameSchematicRail NameNominal VOUT (V)PGOn Threshold (V)PGOff Threshold (V)On Delay (ms)Rise Time (ms)Off Delay (ms)Fall Time (ms)VOUT Over Fault (V)I OUT Over Fault (A)Temp Over Fault (°C)1 Rail #1 VCCINT_FPGA 1 0.9 0.85 5 4 35 4 1.15 35 842 Rail #2 VCCAUX 1.8 1.62 1.53 20 4 20 4 2.07 9.5 843 Rail #3 VCC3V3 3.3 2.97 2.805 35 5 5 5 3.795 9.5 84Notes:1. The values defined in these columns are the voltage, current, and temperature thresholds that cause the regulator to shut down ifthe value is exceeded.