Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Fiche De Données

544

SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]

11063K–ATARM–05-Nov-13

UDP_RST_EP

0xF803C028

Read-write 

This flag is used to reset the FIFO associated with the endpoint and the bit RXBYTECOUNT in the register UDP_CSRx.It also 
resets the data toggle to DATA0. It is useful after removing a HALT condition on a BULK endpoint. Refer to Chapter 5.8.5 in the 
USB Serial Bus Specification, Rev.2.0.

Warning: This flag must be cleared at the end of the reset. It does not clear UDP_CSRx flags.

0 = No reset.

1 = Forces the corresponding endpoint FIF0 pointers to 0, therefore RXBYTECNT field is read at 0 in UDP_CSRx register.

Resetting the endpoint is a two-step operation:

1.

Set the corresponding EPx field.

2.

Clear the corresponding EPx field.

31

30

29

28

27

26

25

24

–

–

–

–

–

–

–

–

23

22

21

20

19

18

17

16

–

–

–

–

–

–

–

–

15

14

13

12

11

10

9

8

–

–

–

–

–

–

–

–

7

6

5

4

3

2

1

0

EP5

EP4

EP3

EP2

EP1

EP0