Functional Safety | Cypress Semiconductor
Cypress' functional safety technology is featured in the most essential automotive designs. These solutions need to operate safely, consistently, and always be prepared to minimize the effects of failures. We're solving your functional safety design problems with your well-being in mind.
Automotive Safety Program
Functional safety (FS) features are required in all automotive designs today. That's why we live by the ISO 26262 automotive standard. This standard ensures a closely watched automotive safety lifecycle and ensures product is kept to certain Automotive Safety Integrity Levels (ASIL). The diagram below shows an example of what an ISO 26262 development looks like.
A system is defined at the vehicle level and broken down into sub-systems with the system supplier for implementation as an Electronic Control Unit (ECU). Please see the diagram below for an example of what an ISO 26262 system development looks like.
We're a key component supplier in the functional safety space. The relationships between the various suppliers in this industry are managed through the Development Interface Agreements (DIA) which ensures the safety standards are integrated from the beginning of the development process. At Cypress, we have a group of experts responsible for defining and maintaining these standards from the beginning to the end of a project lifespan. Our experts ensure that all our products fulfill the ISO 26262 safety standards. They review and analyze the product features and customer feedback to ensure we're always ahead of the curve with our technology.
Our technology also has the backing of a dedicated and independent FS review board confirming execution of deliverables that develop during the design process. The software QA department ensures compliance of any deliverables during the software development process.
The automotive firmware development process has been certified by TÜV SÜD in 2017 to ensure ISO 26262 compliance.
Microcontrollers (MCUs) Safety Program
Our microcontrollers (MCUs) are equipped with state-of-the-art safety features that detect faults within the entire system, starting with the MCU.
With these safety features, random hardware failures are addressed and your technology is free from interference to develop safe application software.
Our MCUs also feature technology that promote the safety of the processor, memories, peripherals, and infrastructure through redundancy and supervision.
Software Safety Program
Our Functional Safety (FS) modules are developed as Safety Elements out of Context (SEooC) to ensure integrity levels withstand ASIL B.
Cypress' FS package comes with the SEooC specifications and a safety manual explaining the development strategy of the firmware.
Our automotive firmware development follows an extended Automotive Software Process Improvement and Capability Determination (SPICE) which has been certified by TÜV SÜD to ensure ISO 26262 compliance.
What’s exceptional hardware without the software to back it up? Learn more about Cypress' Automotive Software solutions here.
Memory Safety Program
With Cypress' Memories you'll enjoy benefits such as:
- Correcting data errors using ECC
- Maintaining data integrity on memory content
- Detecting errors on the memory interface
- Preventing the memory from corruption during boot, erase, and configuration
- Protecting the safety data sectors
- Optimizing endurance and reliability
Memory shouldn't suffer for improved MCU, PMIC, or software performance. Choose Cypress' Memory and it won't.
PMIC Safety Program
For driver's comfort and safety, the electronic equipment for automotive is getting sophisticated. More and more semiconductor devices are integrated in a box, requiring high current for advanced signal processing.
Since power supply failures result in losing the functionality of the electronic equipment, functional safety for power management ICs (PMIC) shall be taken into consideration when implemented in a system. With Cypress’ Functional Safety Program we offer safety-aware PMICs that are used in conjunction with safety microcontrollers to ensure a safe power supply for the safety application. Learn more about PMIC Safety Applications.
The Cypress safety PMICs are carefully designed to reduce the risk of both internal and external failures.
- Various protection functions (OVP, OCP, UVLO, TSD) prevents the PMIC and other E/E devices from being damaged
- Redundant structures to reduce the risk of internal circuitry failure
- Integrated passive components to reduce failures due to contamination
- Integrated watchdog timer to handle the system in case an MCU dies
CapSense® enables attractive, highly functional interfaces with improved durability over mechanical buttons and sliders. Safety requirements for capacitive HMI systems are increasing as buttons get more integrated with safety-critical functions where safe operation is necessary to not impact the health of the driver/passenger.
Some examples of HMI applications that may need functional safety:
- Steering wheel touch buttons – where 1-2 buttons (or a small touchpad) used for cruise control
- Steering wheel grip detection – Autonomous driving feature that requires to reliably detect the presence/absence of driver’s hand
- Sunroof control module buttons/sliders – To safely reject a false touch that could be caused accidentally by a child’s knee.
Cypress is developing collaterals such as application notes for safe touch button systems, Design FMEAs, safety manuals, and FMEDAs, and offering training services on developing safe HMI systems for automotive.
Application Note: Application note on functional safety and the role of Cypress PSoC® devices in achieving functional safety specifically for automotive CapSense button applications.
FMEDAs: Failure Modes, Effects, and Diagnostics Analysis (FMEDA) is a safety analysis used for ISO 26262 compliant developments.
Safety Manual: Safety Manual provides information on the integration of PSoC 4 into a safety-critical system.
DFMEA Services: Design Failure Mode and Effects Analysis (FMEA) specific for customer’s CapSense application prepared by Cypress CapSense and functional safety experts.
CapSense Trainings: Conducted by Cypress expert application engineer at customer site