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DOC7707 Datasheet(PDF) 212 Page - List of Unclassifed Manufacturers |
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DOC7707 Datasheet(HTML) 212 Page - List of Unclassifed Manufacturers |
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212 / 307 page  212 7707F–AVR–11/10 AT90USB82/162 • 7-5 - Reserved The value read from these bits is always 0. Do not set these bits. • 4 - FNCERR -Frame Number CRC Error Flag Set by hardware when a corrupted Frame Number in start of frame packet is received. This bit and the SOFI interrupt are updated at the same time. • 3-0 - Reserved The value read from these bits is always 0. Do not set these bits. 20.18.2 USB device endpoint registers • 7-3 - Reserved The value read from these bits is always 0. Do not set these bits. • 2-0 - EPNUM2:0 Endpoint Number Bits Set to select the number of the endpoint which shall be accessed by the CPU. See Section 20.5, page 197 for more details. Values greater than 100b are forbidden. • 7-5 - Reserved The value read from these bits is always 0. Do not set these bits. • 4-0 - EPRST4:0 - Endpoint FIFO Reset Bits Set to reset the selected endpoint FIFO prior to any other operation, upon hardware reset or when an USB bus reset has been received. See Section 20.3, page 196 for more information Bit 7 65 432 10 - - - FNCERR - - - - UDMFN Read/Wri te RR RR/W R R R R Initial Value 0 0 0 000 00 Bit 7 65 432 10 -- -- - EPNUM2:0 UENUM Read/Wri te R R R R R R/W R/W R/W Initial Value 0 0 0 000 00 Bit 7 65 432 10 - - - EPRST D4 EPRST D3 EPRST D2 EPRST D1 EPRST D0 UERST Read/Wri te RR RR/W R/W R/W R/W R/W Initial Value 0 0 0 000 00 |
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