Datasheet

SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
698
33.9.12 CAN Write Protection Mode Register
Name: CAN_WPMR
Address: 0x400100E4 (0), 0x400140E4 (1)
Access: Read-write
 WPEN: Write Protection Enable
0: The Write Protection is Disabled if WPKEY is written with 0x43414E (“CAN” written in ASCII)
1: The Write Protection is Enabled if WPKEY is written with0x43414E (“CAN” written in ASCII)
Protects the registers:
Section 33.9.1 “CAN Mode Register” on page 681
Section 33.9.6 “CAN Baudrate Register” on page 692
Section 33.9.14 “CAN Message Mode Register” on page 700
Section 33.9.15 “CAN Message Acceptance Mask Register” on page 701
Section 33.9.16 “CAN Message ID Register” on page 702
 WPKEY: SPI Write Protection Key Password.
31 302928 27 26 25 24
WPKEY
23 22 21 20 19 18 17 16
WPKEY
15 14 13 12 11 10 9 8
WPKEY
76543 210
–––––––WPEN
Value Name Description
0x43414E PASSWD
Writing any other value in this field aborts the write operation of the WPEN bit.
Always reads as 0