AT90USB646 datasheet(281/459 Pages) ATMEL

281 / 459 page

281

7593H–AVR–11/08

ATmega32U6/AT90USB64/128

• 2 - SOFE - Start Of Frame Interrupt Enable Bit

Set to enable the SOFI interrupt.

Clear to disable the SOFI interrupt.

• 1 - Reserved

The value read from this bits is always 0. Do not set this bit

• 0 - SUSPE - Suspend Interrupt Enable Bit

Set to enable the SUSPI interrupt.

Clear to disable the SUSPI interrupt.

• 7 - ADDEN - Address Enable Bit

Set to activate the UADD (USB address).

Cleared by hardware. Clearing by software has no effect.

See Section 22.7, page 269 for more details.

• 6-0 - UADD6:0 - USB Address Bits

Load by software to configure the device address.

• 7-3 - Reserved

The value read from these bits is always 0. Do not set these bits.

• 2-0 - FNUM10:8 - Frame Number Upper Value

Set by hardware. These bits are the 3 MSB of the 11-bits Frame Number information. They are

provided in the last received SOF packet. FNUM is updated if a corrupted SOF is received.

• Frame Number Lower Value

Set by hardware. These bits are the 8 LSB of the 11-bits Frame Number information.

Bit

654

ADDEN

UADD6:0

UDADDR

Read/Write

R/W

Initial Val-

000

Bit

543

FNUM10:8

UDFNUMH

Read/Write

Initial Value

Bit

765

43210

FNUM7:0

UDFNUML

Read/Write

RRRRR

RRR

Initial Value

000

00000

AT90USB646 Datasheet(PDF) 281 Page - ATMEL Corporation

AT90USB646 Datasheet(HTML) 281 Page - ATMEL Corporation

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