SAMA5D43_14 Datasheet, PDF (1222/1776 Pages) ATMEL Corporation – Atmel | SMART ARM-based Embedded MPU

40.8.12 TWI Write Protection Mode Register
Name:
Address:
Access:
TWI_WPMR
0xF80140E4 (0), 0xF80180E4 (1), 0xF80240E4 (2), 0xFC0380E4 (3)
Read/Write
31
30
29
28
27
26
25
WPKEY
23
22
21
20
19
18
17
WPKEY
15
14
13
12
11
10
9
WPKEY
7
6
5
4
3
2
1
–
–
–
–
–
–
–
• WPEN: Write Protection Enable
0: Disables the write protection if WPKEY corresponds to 0x545749 (“TWI” in ASCII).
1: Enables the write protection if WPKEY corresponds to 0x545749 (“TWI” in ASCII).
See Section 40.7.6 “Register Write Protection” for the list of registers that can be write-protected.
• WPKEY: Write Protection Key
Value
Name
Description
0x545749
PASSWD
Writing any other value in this field aborts the write operation of the WPEN bit.
Always reads as 0
24
16
8
0
WPEN
1222
SAMA5D4 Series [DATASHEET]
Atmel-11238A-ATARM-SAMA5D4-Datasheet_30-Sep-14