Recently doing a based on Xilinx K7 series 900 chip board project, 4-14 V input, DCDC input and support 5 V electric did not found any abnormalities, sometimes 12 V on the electric power consumption of the board will suddenly increase, again measured 1.0 V and 1.8 V for impedance is wrong, one piece of FPGA board after removed the impedance of the recovery, and the FPGA 1.0 V pin and GND pin has a short circuit, now don't know what is on the board because of problems, power partly verified can run normally in the previous version