AT91SAM9G45B-CU Datasheet, PDF (782/1185 Pages) ATMEL Corporation – AT91SAM ARM-based Embedded MPU

36.13.18 HSMCI Write Protect Mode Register
Name:
HSMCI_WPMR
Addresses:
0xFFF800E4 (0), 0xFFFD00E4 (1)
Access:
Read-write
31
30
29
28
27
26
WP_KEY (0x4D => “M”)
23
22
21
20
19
18
WP_KEY (0x43 => C”)
15
14
13
12
11
10
WP_KEY (0x49 => “I”)
7
6
5
4
3
2
25
24
17
16
9
8
1
0
WP_EN
• WP_EN: Write Protection Enable
0 = Disables the Write Protection if WP_KEY corresponds.
1 = Enables the Write Protection if WP_KEY corresponds.
• WP_KEY: Write Protection Key password
Should be written at value 0x4D4349 (ASCII code for “HSMCI”). Writing any other value in this field has no effect.
SAM9G45 [DATASHEET]
6438K–ATARM–12-Feb-13
782