Atmel SAM4L Xplained Pro Evaluation Kit Atmel ATSAM4L-XPRO ATSAM4L-XPRO Data Sheet

42023E–SAM–07/2013

DFLLxCONF

Read/Write

0x0X100000

Note:

1. The reset value of CALB depends on factory calibration. 

Sets the Calibration Value for the DFLLx. 

Set to 1 when CALIB field has been updated by the Flash fuses after a reset.

0: The flash calibration will be redone after any reset

1: The flash calibration will only be redone after a power-on reset. 

Set the value of the range calibration register. Refer to the table DFLL Frequency Range in the Open loop operation section. 

0: Quick Lock is enabled.

1: Quick Lock is disabled.

0: Chill Cycle is enabled.

1: Chill Cycle is disabled.

0: Locks will not be lost after waking up from sleep modes.

1: Locks will be lost after waking up from sleep modes where the DFLL clock has been stopped.

0: FINE calibration tracks changes in output frequency.

1: FINE calibration register value will be fixed after fine lock.

0: DFLL is in Open Loop operation.

1: DFLL is in Closed Loop operation.

0: DFLL is disabled.

1: DFLL is enabled.

Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Refer to

 for details.

31

30

29

28

27

26

25

24

-

-

-

-

CALIB

23

22

21

20

19

18

17

16

FCD

-

-

-

-

-

RANGE

15

14

13

12

11

10

9

8

-

-

-

-

-

-

-

-

7

6

5

4

3

2

1

0

-

QLDIS

CCDIS

-

LLAW

STABLE

MODE

EN