AT90USB646 datasheet(280/434 Pages) ATMEL

280 / 434 page

280

7593A–AVR–02/06

AT90USB64/128

• Start of frame(

SOFI, if FNCERR=0)

• Suspend detected after 3 ms of inactivity(

SUSPI)

Exception Interrupts are generated when:

• CRC error in frame number of SOF(

SOFI, FNCERR=1)

Figure 22-5. USB Device Controller Endpoint Interrupt System

Processing interrupts are generated when:

• Ready to accept IN data(

EPINTx, TXINI=1)

• Received OUT data(

EPINTx, RXOUTI=1)

• Received SETUP(

EPINTx, RXSTPI=1)

Exception Interrupts are generated when:

• Stalled packet(

EPINTx, STALLEDI=1)

• CRC error on OUT in isochronous mode(

EPINTx, STALLEDI=1)

• Overflow in isochronous mode(

EPINTx, OVERFI=1)

• Underflow in isochronous mode(

EPINTx, UNDERFI=1)

• NAK IN sent(

EPINTx, NAKINI=1)

• NAK OUT sent(

EPINTx, NAKOUTI=1)

EPINT

UEINT.X

Endpoint 0

Endpoint 1

Endpoint 2

Endpoint 3

Endpoint 4

Endpoint 5

Endpoint Interrupt

Endpoint 6

FLERRE

UEIENX.7

OVERFI

UESTAX.6

UNDERFI

UESTAX.5

NAKINI

UEINTX.6

NAKINE

UEIENX.6

NAKOUTI

UEINTX.4

TXSTPE

UEIENX.4

RXSTPI

UEINTX.3

TXOUTE

UEIENX.3

RXOUTI

UEINTX.2

RXOUTE

UEIENX.2

STALLEDI

UEINTX.1

STALLEDE

UEIENX.1

TXINI

UEINTX.0

TXINE

UEIENX.0

AT90USB646 Datasheet(PDF) 280 Page - ATMEL Corporation

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