AT90USB82 datasheet(208/306 Pages) ATMEL

208 / 306 page

208

7707D–AVR–07/08

AT90USB82/162

Figure 20-5. 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(

EPINTx, OVERFI=1)

• Underflow in isochronous mode(

EPINTx, UNDERFI=1)

• NAK IN sent(

EPINTx, NAKINI=1)

•NAK OUT sent(

EPINTx, NAKOUTI=1)

20.18 Registers

20.18.1

USB device general registers

EPINT

UEINT.X

Endpoint 0

Endpoint 1

Endpoint 2

Endpoint 3

Endpoint 4

Endpoint Interrupt

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

654

3210

RSTCPU

RMWKUP

DETACH

UDCON

Read/Wri

RRR

RR/W

R/W

Initial

Value

000

0001

AT90USB82 Datasheet(PDF) 208 Page - ATMEL Corporation

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