Atmel Evaluation Kit for AT32uC3A0512, 32-Bit AVR Microcontroller Atmel ATEVK1105 ATEVK1105 데이터 시트

0x0020

UDFNUM

Read-Only

0x00000000

Set by hardware. These bits are the 11-bit frame number information. They are provided in the last received SOF packet.
Cleared by hardware upon receiving a USB reset.
Note that FNUM is updated even if a corrupted SOF is received.

Set by hardware when a corrupted frame number is received. This bit and the SOF  interrupt flag are updated at the same

time.
Cleared by hardware upon receiving a USB reset.

31

30

29

28

27

26

25

24

–

–

–

–

–

–

–

–

23

22

21

20

19

18

17

16

–

–

–

–

–

–

–

–

15

14

13

12

11

10

9

8

FNCERR

–

FNUM

ru

ru

0

0

0

0

0

0

0

7

6

5

4

3

2

1

0

FNUM

–

–

–

ru

0

0

0

0

0

32058K

AVR32-01/12