32bit RISC-based MCU targets automotive, industrial apps

Posted : 23 Apr 2007

Fujitsu Microelectronics America Inc. (FMA) has expanded its family of 32bit RISC-based MCUs with the new MB91F467B. Designed in close cooperation with major automakers worldwide, the MB91F467B inherits the high-performance core of Fujitsu's MB91460 family and incorporates powerful peripheral functions and features to support different automotive and industrial applications.

Advanced automotives
MB91F467B incorporates six C-CAN controllers and seven LIN-UARTs, backed up by 40Kbyte data RAM and 1,088Kbyte of flash memory with readout protection. These features support the robust computing power and high integration required in advanced automotive designs, including automotive gateways, body-control applications and central controller systems. Moreover, the controller's external bus interface can be connected to Fujitsu's graphics controllers for use in building full-featured dashboards, driver information and advanced driver-assistance systems.

"The new MB91F467B MCU includes all the critical features required by our automotive customers," said Akio Nezu, senior manager of the embedded solutions business group, FMA. "It delivers the efficient data collection, data processing and distribution that are essential to these designs, along with important power-saving and security features."

MB91F467B includes a 100MHz PLL clock circuit that minimizes power consumption by dynamically switching off unused clock trees. An integrated 32kHz sub-clock oscillator used in conjunction with standby modes such as "stop" and "sleep" adds power-saving capabilities. Security and safety applications are supported by the internal clock supervisory circuit, which automatically switches to an internal RC-oscillator as backup in case of a main clock failure.

High-precision signals
The MCU also provides flexible timer architectures and the ability to generate and capture high-precision signals, which are basic requirements for automotive systems. MB91F467B has 8-by-16bit free-running timers, an 8-by-16bit reload timer and 16 PPG channels. For signal capturing, the chip has a 32-channel, 10bit ADC, eight ICU and eight OCU modules.

MB91F467B, which comes in a 144-pin QFP package, functions over the automotive temperature range and operates on a supply voltage of 3-5.5V via its internal voltage regulator.

Engineering samples will be available during the second calendar quarter, accompanied by a full set of development tools such as starter kits, HW/SW debuggers and third-party supported automotive OS AUTOSAR and OSEK. Both versions deliver execution times of 100ns/10MHz. Sample pricing will start at $13 each.