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DOC7707 Scheda tecnica(PDF) 299 Page - List of Unclassifed Manufacturers

Il numero della parte DOC7707
Spiegazioni elettronici  Microcontroller with 8/16K Bytes of ISP Flash and USB Controller
PDF  307 Pages
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Produttore elettronici  ETC1 [List of Unclassifed Manufacturers]
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DOC7707 Scheda tecnica(HTML) 299 Page - List of Unclassifed Manufacturers

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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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