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AT90USB82 Datasheet(PDF) 219 Page - ATMEL Corporation |
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AT90USB82 Datasheet(HTML) 219 Page - ATMEL Corporation |
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219 / 306 page  219 7707D–AVR–07/08 AT90USB82/162 • 7-0 - DAT7:0 -Data Bits Set by the software to read/write a byte from/to the endpoint FIFO selected by EPNUM. • 7-0 - BYCT7:0 - Byte Count Bits Set by the hardware. BYCT7:0 is: - (for IN endpoint) increased after each writing into the endpoint and decremented after each byte sent, - (for OUT endpoint) increased after each byte sent by the host, and decremented after each byte read by the software. • 7-5 - Reserved The value read from these bits is always 0. Do not set these bits. • 4-0 - EPINT4:0 - Endpoint Interrupts Bits Set by hardware when an interrupt is triggered by the UEINTX register and if the corresponding endpoint interrupt enable bit is set. Cleared by hardware when the interrupt source is served. Bit 76543210 DAT D7 DAT D6 DAT D5 DAT D4 DAT D3 DAT D2 DAT D1 DAT D0 UEDATX Read/Wri te R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 00000000 Bit 7 654 3210 BYCT D7 BYCT D6 BYCT D5 BYCT D4 BYCT D3 BYCT D2 BYCT D1 BYCT D0 UEBCLX Read/Wri te R RRR RRRR R Initial Value 0 000 0000 Bit 7 654 3210 - - - EPINT D4 EPINT D3 EPINT D2 EPINT D1 EPINT D0 UEINT Read/Wri te R RRR RRRR R Initial Value 0 000 0000 |
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