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With the high number of Electronic Control Units (ECUs) accompanied by an increasing complexity of functions in today’s cars, functional safety is very important. The growing importance of safety and driver assistance systems in modern cars intensifies the need for more robust and dependable electronic components. Risks resulting from hardware, random failures or systematic hardware/software errors must be reduced as far as reasonably practicable throughout the product’s foreseeable lifetime.

There are guidelines and standards for the process, the technology and the methods used for the implementation of functional safety. Functional safety means the prevention of unacceptable risks that can arise from hazards caused by malfunctions in electrical or electronic systems, such as a CAN or a CAN FD network. As these networks are intended to support data exchange amongst safety-critical functions, the risk of transmitting incorrect data in a network can be reduced dramatically by implementing robust safety measures in the system. As described below, the safety measures available in our CAN transceivers and CAN controllers result in a more robust CAN or CAN FD communication network.

Functional Safety Documentation


To request Functional Safety documentation, contact your local sales office.*

*An NDA is required to access this documentation.

Memory (Flash/RAM) Error Detection and Correction


Feature MCP2517FD
MCP2518FD
Fault
Prevention
Self
Diagnostic
System
Diagnostic
Fault
Mitigation
SRAM with Error Detection and Correction (ECC)    

System Reset, Detect and Manage


Feature MCP2517FD
MCP2518FD
ATA6570 ATA6571 ATA656x
(2/3/4/5/6)
Fault
Prevention
Self
Diagnostic
System
Diagnostic
Fault
Mitigation
Power-on Reset (POR)    
CAN with Loopback Mode            
SPI with Cyclic Redundancy Check (CRC)          
CAN Bus dominant/recessive clamp detection      
Voltage monitoring (VCC, VIO, VS)    
Watchdog          
SPI with Failure Event Detection          
TXD Dominant Timeout    
RXD Recessive clamp detection      
Overtemperature Detection      

GPIO ESD Protection/Peripheral Pin Select


Feature MCP2517FD
MCP2518FD
ATA6570 ATA6571 ATA656x
(2/3/4/5/6)
Fault
Prevention
Self
Diagnostic
System
Diagnostic
Fault
Mitigation
ESD Protection      
I/O Port Readback          

Other Features


Feature MCP2517FD
MCP2518FD
ATA6570 ATA6571 ATA656x
(2/3/4/5/6)
Fault
Prevention
Self
Diagnostic
System
Diagnostic
Fault
Mitigation
MCAL Drivers for AUTOSAR (enabling E2E communication protection)        

For additional information about our functional safety-enabled products and supporting documentation, please visit our Functional Safety page.

 

Legend:
● Available in all devices
○ Available in some devices
- Not Available

Definitions:
Fault Prevention - Silicon feature that prevents damage, unintended configuration changes or invalid operation
Self-Diagnostic - Silicon/software feature that identifies if the silicon is working as it should be
System Diagnostic - Silicon/software feature that identifies if the system is working as it should be
Fault Mitigation - Silicon feature that can be used by the system to transition to a safe state after a fault is detected