Datasheet

940
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
41.9.12 CAN Write Protection Mode Register
Name: CAN_WPMR
Address: 0xF80000E4 (0), 0xF80040E4 (1)
Access: Read-write
• WPEN: Write Protection Enable
0: The Write Protection is Disabled
1: The Write Protection is Enabled
• WPKEY: SPI Write Protection Key Password
If a value is written in WPEN, the value is taken into account only if WPKEY is written with “CAN” (CAN written in ASCII Code, ie
0x43414E in hexadecimal).
Protects the registers:
Section 41.9.1 “CAN Mode Register” on page 924
Section 41.9.6 “CAN Baudrate Register” on page 934
Section 41.9.14 “CAN Message Mode Register” on page 942
Section 41.9.15 “CAN Message Acceptance Mask Register” on page 943
Section 41.9.16 “CAN Message ID Register” on page 944
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
76543210
-------WPEN