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  7. Fujitsu Semiconductor Releases three 32-bit microcontroller products for high speed motor control

Fujitsu Semiconductor Releases three 32-bit microcontroller products for high speed motor control

Fujitsu Semiconductor (Shanghai) Company Limited

Shanghai, May 24, 2011

Fujitsu Semiconductor (Shanghai) Co., Ltd. announced three products from the "MB91580series" which contain driving motor control function for Electrical Vehicles (EV) and Hybrid Vehicles (HV) as part of the high-performance 32-bit FLASH embedded microcontroller (MCU) "FR family". Sample delivery has started since the end of April 2011.

The "MB91580 series" supports the demand for an automotive driving motor control MCU with a dedicated embedded resolver sensor interface to control the three-phase motor used in EV’s and HV’s, where demand is growing rapidly and globally. This is first time that Fujitsu Semiconductor is delivering driving motor control LSI for eco-cars and supporting demand from the market.

Nowadays, the interest in protecting and preserving the Earth’s environment is increasing. Likewise, the demand for eco-cars such as electric vehicles and hybrid vehicles are increasing along with calls for the reduction of exhaust gases that adversely affect air quality. To further drive the adoption of eco-vehicles, Fujitsu foresees that three innovations, namely the improved mobility of motors, reduction in energy consumption, and system cost reduction will be required.

Fujitsu’s 32-bit MCU "MB91580 series" for driving motor control will be able to support such demand quickly and has already begun shipping since the end of April 2011.

Fig.1 Motor control MCU Roadmap

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Fig.1 Motor control MCU Roadmap

The "MB91580 series" contains the most suitable CPU core and peripherals for EV/HV motor control. The dedicated interface circuit in the resolver used for the EV/HV driving motor is embedded in order to achieve system cost reduction as well as contribute to improving motor mobility and reduce energy consumption by realizing a high torque responsive control process which is required for the EV/HV driving motor.

Sample price and delivery time

Series Sample Price Sample delivery time
MB91580 series $25 (Price in case of MB91F585) April 2011


Part number Main Flash Capacity RAM Capacity
(KB: Kilo Byte)
MB91F585 576 KB 48 KB
MB91F586 832 KB 64 KB
MB91F587 1088 KB 96 KB

Sales Target

The Fujitsu team expects to sell a total of 2 million pieces across all three products by FY2014.

Features of this series

1. Peripherals suited for the high torque responsive control process

The following peripherals are available for EV/HV driving motor control which requires high torque responsiveness. By having these peripherals built-in, system cost reduction, as well as high speed feedback control become possible, which lead to improved motor mobility and a reduction in energy consumption.

  • 12-bit A/D converter and R/D converter to detect the electric current and position of the motor with high precision are available. R/D converter detects the electrical angle and synchronizes with the A/D converter which detects the three-phase electric current.
  • An exclusive calculation circuit which automatically calculates the SIN (sine) value and COS (cosine) value of the electrical angle detected by built-in R/D converter is installed. The information needed for motor feedback control is generated by the hardware.
Fig 2. Detection of electric current and postion and feedback control

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Fig 2. Detection of electric current and postion and feedback control

2. Built-in FPU in the high-performance CPU core

An Exclusive Floating Point Unit (FPU) is included in the 160DMIPS high performance CPU. The FPU enables the CPU to process vector conversion and PID control calculation using the information generated by the built-in peripherals. This feature contributes to improved motor mobility and at the same time reduces power consumption by increasing the speed of feedback control. In addition, by holding down the CPU load depending on motor control, control over systems other than the power motor (DC/DC converter and battery management, etc.) is enabled, and this contributes to the total cost reduction by system integration.


For more information:

About Fujitsu Semiconductor (Shanghai) Co.,Ltd.

Fujitsu Semiconductor (Shanghai) Co., Ltd. was established in August 2003 as Fujitsu’s semiconductor business representative in China. Headquartered in Shanghai, it has branch offices in Beijing, Shenzhen and Dalian to provide sales and service support to customers throughout China.
Fujitsu Semiconductor (Shanghai) Co., Ltd. offers an extensive range of products from microcontroller, application-specific integrated circuit (ASIC), application-specific standard product (ASSP), system-on-chip (SoC) to system memory, that can be supplied as product or complete solution. With technology resource centres and ASIC design support centres strategically located in Hong Kong , Shanghai, Taiwan and Chengdu, as well as Heavy investments in design and engineering capabilities and application support resources, complemented by a regional network of design partners, suppliers and distributors, Fujitsu Semiconductor (Shanghai) Co., Ltd. can readily delivers innovative and value-added solutions and varied range of products to its target markets in China.
For more information, please see:

Corporate Planning & Communications:Cao Miao

Phone: Phone: +86 21-6146-3688
Fax: +86 21-6335-1610
E-mail: E-mail:
Company:Fujitsu Semiconductor (Shanghai) Co., Ltd.

All company or product names referenced herein are trademarks or registered trademarks of their respective owners. Information provided in this press release is accurate at time of publication and is subject to change without advance notice.

Press Release ID: 2011-05-24
Date: 24 May, 2011
City: Shanghai
Company: Fujitsu Semiconductor (Shanghai) Co., Ltd.


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