AT90USB646 datasheet(278/459 Pages) ATMEL

278 / 459 page

278

7593H–AVR–11/08

ATmega32U6/AT90USB64/128

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)

22.18 Registers

22.18.1

USB device general registers

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

Bit

6543

---

LSM

RMWKUP

DETACH

UDCON

Read/Write

RRRR

R/W

Initial Value

0000

AT90USB646 Datasheet(PDF) 278 Page - ATMEL Corporation

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