Use the Flash*Freeze switch (SW6 F*F) to control Flash*Freeze mode. To enable Flash*Freeze mode, slide SW6 toward FF_ON, and to disable Flash*Freeze mode, slide SW6 toward FF_OFF. Flash*Freeze technology enables you to quickly (within 1 μs) enter and exit the Flash*Freeze mode by activating the Flash*Freeze pin, while all the power supplies are kept at their original values. I/Os, global I/Os, and clocks can still be driven and can be made to toggle without impact on power consumption; while the device retains all core registers, SRAM information, and I/O states. For more information about Flash*Freeze mode, see Documentation Resources.