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<strong>VIPER</strong> <strong>Technical</strong> <strong>Manual</strong>Power and power managementExample 3: <strong>VIPER</strong> [Windows CE] at 400MHz in power saving mode + LCD with backlight on + 64MB FlashDioUSB memory stickIn this case, the power consumed by the respective categories is:• <strong>VIPER</strong> current (Windows CE default) while idle = 334mA ±3mA - 9mA= 325mA ±3mA.<strong>VIPER</strong> current (Windows CE default) while active = 334mA + 99mA ±20mA= 433mA ±20mA.• Power saving = 0mA.• External peripheral current (USB memory stick quiescent) = 650mA (LCD) + 75mA= 725mA.External peripheral current (USB memory stick read) = 650mA (LCD) + 121mA= 771mATherefore, the estimated <strong>VIPER</strong> current while idle (min) is:325mA ±3mA + 725mA= 1050mA, ±3mA (5250mW, ±15mW).and the estimated <strong>VIPER</strong> current while active and reading from USB memory stick(max) is:433mA ±20mA + 771mA= 1204mA, ±20mA (6020mW, ±100mW) .© 2007 Arcom Issue D 80