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CAN FD in MCU families

At the Embedded World, Spansion presents its product line-up supporting the CAN FD protocol for automotive electronics and the industrial Internet of Things (IoT).

The Traveo MCU family for automotive applications (Photo: Spansion)

SPANSION HAS ADOPTED THE NEW PROTOCOL at an early stage and already offers a range of products supporting the CAN FD protocol, among them the Traveo family of automotive MCUs and the FM4 family of MCUs for industrial applications. As a member of CAN in Automation, Spansion has been bringing their expertise and working in a task force to drive the ISO standardization of the CAN FD protocol.

“A faster and more efficient CAN network will be necessary in the future since we are at the beginning of a new data explosion in both automotive electronics and the Internet of Things. This can make life difficult for design engineers, because having all components communicating effectively is more important than ever,” says Wolfgang Wiewesiek, marketing manager of the automotive MCU business unit, Spansion. “This is why we have been working with CiA to bring CAN to the next level.”

Currently, Spansion offers single, dual, and quad CAN FD interfaces on both Traveo and FM4 MCUs. Future roadmaps include architectures for up to 8 channels per MCU. Also, with the completion of the ISO standardization, the products will migrate from non-ISO CAN FD to ISO CAN FD. Any future MCU implementation will provide legacy mode for non-ISO CAN FD. Also, Classical CAN is provided as a legacy protocol on any CAN FD MCU.

The Traveo MCU family for automotive applications (Photo: Spansion)

CAN FD in automotive applications

The Traveo S6J3100 series incorporates CAN FD for enhanced in-vehicle networking. The product family is focused on various automotive applications including body control module (BCM) and heating, ventilation, and air conditioning (HVAC). In addition to the CAN FD interface, the series comes with a maximum 4 MiB of flash memory to enable high-level program control, and uses 55 nm technology. It also features secure hardware extension (SHE) for network security and improved performance for connected cars, as well as partial wakeup for lowering power consumption.

The Traveo Graphics MCU is the first 3D-capable ARM Cortex-R5 cluster MCU aimed at human machine interfaces in automotive dashboards. Besides CAN FD, a proprietary Hyper Bus interface has been integrated to provide customers design simplification and faster performance in automotive systems. It delivers 2D and 3D graphics. In addition to the graphics feature-set, the solution includes enhanced and next-generation connectivity, supporting a range of communications protocols, including CAN and CAN FD. Two variations are available, the S6J324C series enables 2D graphics, while the S6J326C variant supports both 2D and 3D graphics.

The Traveo MCU family for automotive applications (Photo: Spansion)

CAN FD for the industrial Internet of Things

For the industrial IoT, Spansion (US) has enhanced its FM4 family of flexible micro-controllers (MCUs). The S6E2CC MCU series based on the ARM Cortex-M4F core is designed for enhanced human machine interfaces and machine-to-machine communications. The set of peripherals and the memory allow single-chip solutions for a variety of applications, including factory automation, industrial IoT, motor control, office automation, building management systems, smart meters, digital cameras and multi-function printers. The family supports more than a dozen different communications and memory interfaces, among them CAN and CAN FD.

The FM4 S6E2DH series of MCUs is a combination of the ARM Cortex-M4 micro-controller, an integrated 2D rendering graphics display controller (GDC) with dedicated video RAM, and a mix of communication and digital peripherals. The GDC enables graphics processing and offloads the micro-controller CPU for other application functions. The Hyper Bus interface is part of the graphics subsystem, allowing fast image retrieval without blocking code execution. These features make the S6E2DH suitable for smart consumer/home appliances, where the bill of material (BOM) cost is kept low while delivering the graphics experience that consumers expect.

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