Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet

SAM4E [DATASHEET]

Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14

1190

UDP_TXVC

0x40084074

Read/Write  

WARNING: The UDP peripheral clock in the Power Management Controller (PMC) must be enabled before any read/write 
operations to the UDP registers including the UDP_TXVC register.



When UDP is disabled, power consumption can be reduced significantly by disabling the embedded transceiver. This can 
be done by setting TXVDIS field.

To enable the transceiver, TXVDIS must be cleared.



0: The 1.5K

Ω integrated pull-up on DDP is disconnected.

1: The 1.5 K

Ω integrated pull-up on DDP is connected.

NOTE: If the USB pull-up is not connected on DDP, the user should not write in any UDP register other than the 
UDP_TXVC register. This is because if DDP and DDM are floating at 0, or pulled down, then SE0 is received by the device 
with the consequence of 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

–

–

–

–

–

–

PUON

TXVDIS

7

6

5

4

3

2

1

0

–

–

–

–

–

–

–

–