As part of an evaluation of the Atmel AVR ATxmega32E5, it can be of interest to measure its power consumption. Because the XMEGA has a separate power plane (VCC_MCU_P3V3) on this board it is possible to measure the current consumption by measuring the current flowing into this plane. The VCC_MCU_P3V3 plane is connected via a jumper to the main power plane (VCC_P3V3) and by replacing this with an ampere meter it is possible to determine the current consumption. To locate the power measurement header, refer to Figure 1.
Do not power the board without having the jumper or an ampere meter mounted since this can cause latch-up of the Atmel AVR ATxmega32E5 due to current flow into the I/O pins.