AT90USB646 datasheet(273/456 Pages) ATMEL

Part #	AT90USB646

Description	8-bit Atmel Microcontroller with 64/128Kbytes of ISP Flash and USB Controller

PDF	456 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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273 / 456 page

273

7593L–AVR–09/12

AT90USB64/128

Figure 23-9. 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)

23.18 Registers

23.18.1

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

LSM

RMWKUP

DETACH

UDCON

Read/write

R/W

Initial value

AT90USB646 Datasheet(PDF) 273 Page - ATMEL Corporation

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