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DOC7707 Datasheet(PDF) 299 Page - List of Unclassifed Manufacturers |
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DOC7707 Datasheet(HTML) 299 Page - List of Unclassifed Manufacturers |
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299 / 307 page  299 7707F–AVR–11/10 AT90USB82/162 Problem Fix/workaround Before entering sleep, interrupts not used to wake up the part from the sleep mode should be disabled. 2. Transient perturbation in USB suspend mode generates overconsumption In device mode and when the USB is suspended, transient perturbation received on the USB lines generates a wake up state. However the idle state following the perturbation does not set the SUSPI bit anymore. The internal USB engine remains in suspend mode but the USB differential receiver is still enabled and generates a typical 300µA extra-power con- sumption. Detection of the suspend state after the transient perturbation should be performed by software (instead of reading the SUSPI bit). Problem fix/workaround USB waiver allows bus powered devices to consume up to 2.5mA in suspend state. |
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