The Atmel AVR XMEGA devices are capable of achieving extremely low power consumption, which is required by both portable electronics and other batterypowered applications. To reach the lowest possible power figures there are a few points to pay attention to it is not only the sleep mode that defines the power consumption, but also the state of the I/O pins, the number of enabled peripheral modules and so on. This application note describes what must be done to achieve the lowest possible power consumption for XMEGA devices. Example code is also supplied, which compiles with both GCC and IAR Embedded Workbench. Figure 1-1. The XMEGA devices can achieve powers that are barely measurable.