Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet

827

SAM4S Series [DATASHEET]

Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14

US_WPMR

0x400240E4 (0), 0x400280E4 (1)

Read/Write

0: Disables the write protection if WPKEY corresponds to 0x555341 (“USA” in ASCII). 
1: Enables the write protection if WPKEY corresponds to 0x555341 (“USA” in ASCII). 
See 

 for the list of registers that can be wirte-protected.

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

0x555341

PASSWD

Writing any other value in this field aborts the write operation of the WPEN bit. Always reads 

as 0.