Atmel Evaluation Kit AT91SAM9X25-EK AT91SAM9X25-EK Hoja De Datos

273

SAM9X25 [DATASHEET]

11054E–ATARM–10-Mar-2014

PIO_WPMR

0xFFFFF4E4 (PIOA), 0xFFFFF6E4 (PIOB), 0xFFFFF8E4 (PIOC), 0xFFFFFAE4 (PIOD)

Read-write

See 

For more information on Write Protection Registers, refer to 

0: Disables the Write Protect if WPKEY corresponds to 0x50494F (“PIO” in ASCII). 

1: Enables the Write Protect if WPKEY corresponds to 0x50494F (“PIO” in ASCII). 

Protects the registers:

Should be written at value 0x50494F (“PIO” in ASCII). Writing any other value in this field aborts the write operation of the WPEN 
bit. Always reads as 0.

31

30

29

28

27

26

25

24

WPKEY

23

22

21

20

19

18

17

16

WPKEY

15

14

13

12

11

10

9

8

WPKEY

7

6

5

4

3

2

1

0

–

–

–

–

–

–

–

WPEN