This user defined field forces the value of the device junction temperature. XPE then adjusts the ambient temperature to meet the specified junction temperature. This option could be used when you need to work backward from a known or assumed worst case junction temperature and define the environment that would ensure this temperature is not exceeded. The Xilinx® Analog to Digital Converter (XADC) component is included in many of the current devices. As the XADC measures the Junction Temperature, you should wait for the value to stabilize before and after configuring the device.