Datasheet

893
SAM9X35 [DATASHEET]
11055E–ATARM–10-Mar-2014
41.8.5 Write Protected Registers
To prevent any single software error that may corrupt CAN behavior, the registers listed below can be write-protected by
setting the WPEN bit in the CAN Write Protection Mode Register (CAN_WPMR).
If a write access in a write-protected register is detected, then the WPVS flag in the CAN Write Protection Status Register
(CAN_WPSR) is set and the field WPVSRC indicates in which register the write access has been attempted.
The WPVS flag is automatically reset after reading the CAN Write Protection Status Register (CAN_WPSR).
List of the write-protected registers:
Section 41.9.1 “CAN Mode Register” on page 895
Section 41.9.6 “CAN Baudrate Register” on page 905
Section 41.9.14 “CAN Message Mode Register” on page 913
Section 41.9.15 “CAN Message Acceptance Mask Register” on page 914
Section 41.9.16 “CAN Message ID Register” on page 915