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Automotive micro-controller

Product family with CAN FD interface

Spansion has started shipping samples of its Traveo micro-contoller S6J3100 series incorporating the CAN FD interface. In addition to the CAN FD interface operating at 5 Mbit/s, the series comes with 4 MiB of flash memory and uses 55-nm technology.

(Photo: Spansion)

WITH A MAXIMUM 5-MBIT/S DATA-RATE, the 32-bit micro-controller delivers high-speed vehicle communication while retaining compatibility with conventional CAN, which offers a maximum of 1 Mbit/s. Two CAN FD channels are available.
The series features Secure Hardware Extension (SHE) for network security and improved performance for connected cars, as well as advanced partial wakeup for lowering power consumption. The family of micro-controllers is based on the ARM Cortex-R5 core and tailored for a range of automotive applications including body control module (BCM), heating, ventilation, and air conditioning (HVAC). In May 2014, the company introduced the first product of the family, the MB9D560 series
for vehicle electrification utilized in hybrid electric vehicles (HEV) and electrical vehicles (EV).

The micro-controller is embedded with 4-MiB flash memory as internal memory. This flash memory enables read-out after one waits for access from the CPU (central processing unit). Furthermore, 144-MHz operation is possible using a single power supply. In addition to conventional flash security, which protects data stored in the micro-controller, the series is equipped with SHE (specification version 1.1). The key management housed within the micro-controller is separated using hardware and an authentication function. This prevents data modification, theft, and invalid access to the vehicle network.

Normally, when A/D conversion is performed from the low power-consumption mode, the CPU is interrupted and the system returns to normal operation. Afterwards, it is necessary to start the A/D converter from the CPU. However, when using partial wakeup, power is cut to items other than the Real Time Clock (RTC). Then, once the RTC performs a specified count, the A/D converter is started and conversion begins without passing through the CPU. If conversion results are not within the scope of set values, it is possible to start the CPU through interruption. Partial wakeup makes it possible to lower power consumption even further when periodically checking for sensor malfunctions.

"This announcement underscores our commitment to technology leadership in our Spansion Traveo family of automotive micro-controllers," said Nobuhiko Akasaka, vice president of Spansion's Automotive MCU Business Unit. "The delivery of the CAN FD interface in our MCUs provides industry-leading performance. This latest edition of the Traveo family builds upon our momentum in automotive micro-controllers and addresses customer requirements for faster, secure and energy-efficient solutions."

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