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

383

SAM4E [DATASHEET]

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

SUPC_CR

0x400E1810

Write-only

This register can only be written if the WPEN bit is cleared in the System Controller Write Protection Mode Register 
(SYSC_MR). 



0 (NO_EFFECT): No effect.

1 (STOP_VREG): If KEY is correct, asserts the vddcore_nreset and stops the voltage regulator.

Note: This bit is located in the VDDIO domain.



0 (NO_EFFECT): No effect.

1 (CRYSTAL_SEL): If KEY is correct, switches the slow clock on the crystal oscillator output.

Note: This bit is located in the VDDIO domain.



31

30

29

28

27

26

25

24

KEY

23

22

21

20

19

18

17

16

–

–

–

–

–

–

–

–

15

14

13

12

11

10

9

8

–

–

–

–

–

–

–

–

7

6

5

4

3

2

1

0

–

–

–

–

XTALSEL

VROFF

–

–

0xA5

PASSWD

Writing any other value in this field aborts the write operation.