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MCU family integrates peripheral functions

Posted: 19 Nov 2010 ?? ?Print Version ?Bookmark and Share

Keywords:MCU? RISC? motor control? ARM Cortex-M3?

Fujitsu Semiconductor America Inc. (FSA) rolls the first members of the Fujitsu FM3 MCU family of 32-bit general-purpose RISC microcontrollers that are based on the ARM Cortex-M3 CPU core.

The MB9BF500/400/300/100 and MB9AF100 series target motor-control applications in industrial automation and consumer appliances.

With the FM3 MCU family, Fujitsu builds on the Cortex-M3 core architecture by integrating the company�s embedded flash technology and peripheral features. The FM3 family also provides communication and control macros, along with custom enhancements such as high-precision motor control and a wide range of operating voltages, enabling system designers to use the FM3 family to meet a full range of design requirements.

The High-Performance B9BF500/400/300/100 series is designed to provide the full range of integrated advanced peripheral functions and the higher-speed and greater memory density required by the 32-bit market. The devices operate at 80MHz, with up to 512KB high-speed flash memory and up to a 64KB SRAM.

The MCUs in the series are capable of supporting USB, CAN, UART, SIO, I2C, and LIN communications protocols, and will be available in LQFP120, LQFP100, QFP100, and BGA112 packages.

The Basic MB9AF100 Series features the lower-cost, power-saving technology and compact design required by the 16-bit market. The Basic Series, which includes limited versions of the advanced peripheral functions of the High-Performance Series, is optimized for use primarily in major home appliances, digital consumer devices and office automation devices. The Basic Series devices operate at 40MHz, support up to 256KB high-speed flash memory and up to 32KB SRAM, and are available in LQFP120, LQFP100, QFP100, and BGA112 packages.

The MCUs incorporate Fujitsu�s NOR flash memory. Designed to deliver 100,000 write cycles with data retention up to 20 years, the Fujitsu single-cycle flash memory with ECC and data-protection functionality can operate with a zero wait cycle at up to 60MHz, and offers among the fastest memory access in its class.

The FM3 MCU family also incorporates the peripheral features of the Fujitsu FR microcontrollers along with additional peripheral macros specifically for high-precision motor control, such as three independent 12-bit ADCs (+/-2LSB 1.0s conversion). With support for up to 16 channels, the ADCs provide positional accuracy and fine-tuned motor control for factory automation applications, such as high-precision and high-speed servo motors. A positional sensing counter monitors motor rotation, providing automatic hardware-based detection, which minimizes the CPU workload and reduces the amount of power consumed by inverter systems.

Fujitsu integrated these and other hardware features in the FM3 family to help reduce the cost and make it easier for end products incorporating the FM3 family MCUs to meet the IEC60730 safety standard for household appliances.

The FM3 MCU family also supports a wide voltage range from 2.7V to 5.5V with a single power supply. Most MCUs using the Cortex-M3 core operate at 3.6V or lower and therefore cannot be used in 5V systems, but the Fujitsu FM3 family can operate at up to 5V, making the Fujitsu MCU usable for factory automation equipment and major home appliances.

Initial samples will be available in late November. Samples of other series devices offering a range of peripheral, memory and package options will be available in January 2011, with volume shipment available in April 2011. Volume pricing is available upon request.

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