SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 864

• Manufacturer Part Number: SAM3X8E
• Manufacturer: Atmel Corporation

35.8.18
Name:
Address:
Access:
Reset:
• 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
Should be written at value 0x555341 (“USA” in ASCII). Writing any other value in this field aborts the write operation of the
WPEN bit. Always reads as 0.
864
864
•
•
•
•
•
•
•
“USART Mode Register” on page 837
“USART Baud Rate Generator Register” on page 853
“USART Receiver Time-out Register” on page 854
“USART Transmitter Timeguard Register” on page 855
“USART FI DI RATIO Register” on page 856
“USART IrDA FILTER Register” on page 858
“USART Manchester Configuration Register” on page 859
31
23
15
—
7
SAM3X/A
SAM3X/A
USART Write Protect Mode Register
US_WPMR
0x400980E4 (0), 0x4009C0E4 (1), 0x400A00E4 (2), 0x400A40E4 (3)
Read-write
See
Table 35-17
30
22
14
—
6
29
21
13
—
5
28
20
12
—
4
WPKEY
WPKEY
WPKEY
27
19
11
—
3
26
18
10
—
2
25
17
—
9
1
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
WPEN
24
16
8
0