Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet
Product codes
AT91SAM9N12-EK
841
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
40.8.29 USART Write Protect Mode Register
Name:
US_WPMR
Addresses:
0xF801C0E4 (0), 0xF80200E4 (1), 0xF80240E4 (2), 0xF80280E4 (3)
Access:
Read-write
Reset:
See
• WPEN: Write Protect Enable
0: Disables the Write Protect if WPKEY corresponds to 0x555341 (“USA” in ASCII).
1: Enables the Write Protect if WPKEY corresponds to 0x555341 (“USA” in ASCII).
Protects the registers:
• WPKEY: Write Protect KEY
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
Value
Name
Description
0x555341
PASSWD
Writing any other value in this field aborts the write operation of the WPEN bit. Always reads as 0.