What is CAN/CAN FD?

CAN is an abbreviation for Controller Area Network, and is a communication standard originally developed by Bosch in Germany. It is now a major communication method in the automotive industry. It is said that the maximum data transfer speed of CAN is about 1 Mbps for a 40 m communication line and about 125 kbps for a 500 m communication line. In order to realize autonomous driving functions and associated cyber security measures, there is a need for in-vehicle networks that are capable of high-speed and large-volume data communication.

Therefore, CAN FD (CAN with Flexible Data rate) is a standard announced by Bosch, which developed CAN, as an extension of CAN. The maximum bit rate of the data phase is not clearly specified because it depends greatly on the network topology, etc., but ISO 11898-2:2016 specifies requirements up to 5 Mbps, so in simple terms, CAN FD is Compared to CAN, it is an in-vehicle network that can communicate more data at higher speeds.

Why is CAN FD required?

As I explained in the previous section, various functions are electronically controlled in modern automobiles, and the computerization is accelerating year by year. is also said to be equipped with "Powertrain system" applications including engine control directly related to the "running, turning, and stopping" functions that are directly related to the movement of automobiles, and drive motor control for xEV vehicles, and the power that is essential for correct vehicle control In addition to "safety" applications that include steering and brake control, there are "body" applications that include functions such as various controls and infotainment in the vehicle interior, and various ECUs in automobiles. ECUs are in constant communication with each other.

With many ECUs already in existence, even more data communication will be required when considering cyber security measures that are a concern with autonomous driving functions. Therefore, there are cases where the communication speed and capacity of CAN are insufficient, and the need for CAN FD is accelerating.

What is the popular CAN FD SIC?

CAN FD SIC stands for Signal Improvement Capability and is often mistaken for SiC, but it is a product that adds signal improvement functionality to the conventional CAN FD.

CAN technology was developed to provide a robust and scalable network, but maintaining robustness at higher data rates is difficult.Ringing in low data rate networks can be compensated for with time, but at higher data rates this bit time is no longer available.To achieve both a stable network and the high data rates required for modern networks, the CAN SIC transceiver was developed with signal improvement features.

CAN FD SIC transceivers actively improve signal integrity within the network, reduce signal ringing effects and allow operation in large topologies at significantly higher bit rates than previously possible. CAN FD SIC products also replace existing CAN (FD) transceivers, so no major changes to your application are required. In addition, they are backward compatible with existing CAN transceiver solutions.

The new CAN FD SIC technology supports networks with transmission speeds from 500 kbit/s up to 8 Mbit/s.

Anti-Ringing:
• Transceiver controls dominant to recessive edge
• Then, the CAN bus is driven with low impedance for 300ns.

advantage:
• SIC ensures stable signal even after recessive transition
• No software or microcontroller changes required
• SIC allows flexible design of large-scale topologies with high data rates

Infineon also has a lineup of CAN FD SIC products, so please take a look at their product introduction page.

How to support CAN-FD?

CANfromCAN FDThere are some changes that need to be made to accommodate this.

There are parts that need to be changed physically and parts that need to be changed from a software perspective, but at least the CAN transceiver and microcontroller themselves need to be changed to ones that are compatible with FD, so below are Infineon's FD compatible transceivers. Introducing microcontrollers.

Infineon - CAN FD compatible transceiver

Here we will introduce Infineon's CAN FD compatible transceivers.

Infineon has a proven track record of CAN transceivers for over 10 years and has shipped approximately 2 billion units worldwide. In addition to the conventional DSO-8 type, we also offer an ultra-compact TSON-8 (3mm x 3mm) package, which supports CAN FD supporting 5Mbps, as well as CAN FD, which aims to further improve energy efficiency. CAN PN (The CAN Partial Networking (CAN Partial Networking) protocol has also been newly defined.

In addition, in the automotive industry, we often hear the keyword "reliability", and Infineon is compliant with "Grade 0" automotive compliance (Ta: -40°C to +150°C, high temperature mission profile testing). We also have a lineup of products that have been cleared. Infineon's transceiver products offer the best value with superior performance, durability and reliability.

• Fully compliant with ISO11898-2:2016 and SAE J2284-4/-5
• Loop delay symmetry for up to 5Mbps
• VeLIO (Vehicle LAN Interoperability and Optimization) certified *TLE935x series
• VIO input (3.3V or 5V) for voltage adaptation to MCU interface
• Low electromagnetic emissions (EME) properties allow use without CMC
• Robust against ESD according to IEC61000-4-2
• TxD timeout function
• Very low current consumption when powered down
• In addition to conforming to AEC-Q100, qualified according to the stricter "Grade 0" *TLT925x series
• Reliable track record and high reliability

Please check the following page for detailed product lineup and specifications.

More information on Infineon's CAN transceiver products here

Infineon - CAN FD compatible microcontroller

Here we will introduce Infineon's CAN FD compatible microcontroller.

Infineon has prepared an extremely wide lineup of microcontrollers from high-end to low-end to support any automotive application.

In particular, the AURIX series and TraveoT2G series are product groups that are compatible with CAN FD in all model numbers.

AURIX™ series	TRAVEO™ series
・Uses proprietary TriCore™ technology ・ASIL-D compatible ・FULL-EVITA compatible ・OTA compatible	・Uses ARM® Cortex®-M technology ・ASIL-B compatible ・FULL-EVITA compatible · Low power consumption ・OTA compatible

Infineon also boasts the world's top share of automotive microcontrollers and has a strong track record in the market.
Please check the link below for detailed product lineup and specifications.

Click here for details on Infineon's automotive microcontroller products.

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