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AT90USB646 Datasheet(PDF) 260 Page - ATMEL Corporation |
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AT90USB646 Datasheet(HTML) 260 Page - ATMEL Corporation |
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260 / 435 page  260 7593D–AVR–07/06 AT90USB64/128 both Pipe/Endpoint 4 and 5 use a common area. The data of those endpoints are potentially lost. Note that: • the data of Pipe/Endpoint 0 are never lost whatever the activation or deactivation of the higher Pipe/Endpoint. Its data is lost if it is deactivated. • Deactivate and reactivate the same Pipe/Endpoint with the same parameters does not lead to a “slide” of the higher endpoints. For those endpoints, the data are preserved. • CFGOK is set by hardware even in the case that there is a “conflict” in the memory allocation. 21.8 PAD suspend The next figures illustrates the pad behaviour: • In the “idle” mode, the pad is put in low power consumption mode. • In the “active” mode, the pad is working. Figure 21-15. Pad behaviour The SUSPI flag indicated that a suspend state has been detected on the USB bus. This flag automatically put the USB pad in Idle. The detection of a non-idle event sets the WAKEUPI flag and wakes-up the USB pad. Idle mode Active mode USBE=1 & DETACH=0 & suspend USBE=0 | DETACH=1 | suspend |
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