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AT90USB646 Datasheet(PDF) 284 Page - ATMEL Corporation |
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AT90USB646 Datasheet(HTML) 284 Page - ATMEL Corporation |
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284 / 456 page  284 7593L–AVR–09/12 AT90USB64/128 • 7-0 - BYCT7:0 - Byte Count (low) bits Set by the hardware. BYCT10:0 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 - Reserved The value read from these bits is always 0. Do not set these bits. • 6-0 - EPINT6:0 - 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 765432 10 BYCT D7 BYCT D6 BYCT D5 BYCT D4 BYCT D3 BYCT D2 BYCT D1 BYCT D0 UEBCLX Read/write RRRRRRRR Initial value 000000 00 Bit 7 6543210 - EPINT D6 EPINT D5 EPINT D4 EPINT D3 EPINT D2 EPINT D1 EPINT D0 UEINT Read/write R R R RRRRR Initial value 0 0000000 |
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