Atmel SAM4L-EK Atmel ATSAM4L-EK ATSAM4L-EK Data Sheet

42023E–SAM–07/2013

UESTAn, n in [0..7]

Read-Only 0x0100

0x0130 + (n * 0x04)

0x00000000

Writing a zero or a one to this bit has no effect.

This bit is cleared after a SETUP packet to indicate that the following packet is an OUT packet.

This bit is set after a SETUP packet to indicate that the following packet is an IN packet.

This bit is set for non-control endpoints, indicating the current bank:

This field may be updated one clock cycle after the RWALL bit changes, so the user should not poll this field as an interrupt bit.

This field is set to indicate the number of busy banks:

31

30

29

28

27

26

25

24

-

-

-

-

-

-

-

-

23

22

21

20

19

18

17

16

-

-

-

-

-

-

CTRLDIR

-

15

14

13

12

11

10

9

8

CURRBK

NBUSYBK

RAMACERI

-

DTSEQ

7

6

5

4

3

2

1

0

-

STALLEDI/

CRCERRI

-

NAKINI

NAKOUTI

RXSTPI/

ERRORFI

RXOUTI

TXINI

0

0

Bank0

0

1

Bank1

1

0

Reserved

1

1

Reserved

0

0

0 (all banks free)

0

1

1

1

0

2

1

1

Reserved