FUJITSU SEMICONDUCTOR

DATA SHEET

Prelminary 2004.11.12

32-Bit Proprietary Microcontroller

LSI Network Security System

MB91401

■DESCRIPTION

The MB91401 is a network security LSI incorporating a Fujitsu’s 32-bit, FR-family RISC microcontroller with 10/ 100Base-T MAC Controller, encryption function and authentication function. The LSI contains an encryption authentication hardware accelerator that boosts the LSI’s performance for encryption and authentication commu- nication (IKE/IPsec/SSL) to be demanded further.

The MAC controller has a packet filtering function that reduces the load on the CPU for an increasing amount of packet processing. In addition, the board has the External interface for high-speed data communication with various external hosts, USB ports as general-purpose interfaces, and various card interfaces.

■FEATURES

•Encryption and authentication processing by hardware accelerator function

The LSI performs processing five times faster than by the conventional combination of encryption/authentication hardware macros and software or about 400 times faster than by software only. In addition, CPU processing load factor to be involved in the encryption and the authentication processing can be decreased to 1/5 or less.

Also, the LSI uses the embedded accelerator to execute that public-key encryption algorithm about 100 times faster than by software processing, which generally puts an extremely heavy load microcontrollers.

(Continued)

■PACKAGE

244-pin plastic FBGA

(BGA-240P-M01)

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Fujitsu MB91401 manual Description, Features, Package
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MB91401 specifications

The Fujitsu MB91401 microcontroller is a versatile device designed for automotive applications, embedded systems, and industrial control. It belongs to the MB91400 series, known for its robustness and efficiency. This series integrates advanced features and technologies that cater to a wide variety of real-time applications.

One of the standout features of the MB91401 is its 32-bit RISC architecture, which operates at clock speeds up to 40 MHz. This high-performance core enables rapid processing and data handling, making it suitable for demanding applications. The microcontroller is equipped with a generous amount of Flash memory, allowing developers to store essential firmware and applications directly on the chip, enhancing reliability and reducing design complexity.

Another key characteristic is its extensive memory configuration, which includes SRAM for data storage and EEPROM for non-volatile data retention. This combination provides flexibility for developers, enabling them to tailor the memory allocation based on specific application requirements.

The MB91401 is designed with a focus on peripheral integration. It features multiple I/O ports, timer units, and A/D converters, making it an ideal choice for applications that require precise timing and analog signal processing. The analog-to-digital converters offer high resolution and fast conversion speeds, which are critical in automotive and industrial control systems where accuracy is paramount.

Safety is a critical consideration in automotive applications, and the MB91401 addresses this with built-in diagnostic features and error detection capabilities. These features help ensure that the application remains functional and safe under various operating conditions.

In terms of connectivity, the microcontroller supports various communication protocols, including CAN, UART, and SPI, facilitating seamless integration with other systems and devices. This is particularly important in automotive applications where communication between different electronic control units (ECUs) is essential for overall system functionality.

The Fujitsu MB91401 is also designed for low power consumption, making it suitable for battery-operated devices and energy-sensitive applications. Its various power-saving modes allow developers to optimize the system's performance while extending operational life.

In summary, the Fujitsu MB91401 is a powerful and flexible microcontroller that combines high-performance processing with extensive peripheral support and safety features. Its robust architecture and energy-efficient design make it an excellent choice for a wide range of automotive and industrial applications, promoting both reliability and innovation in embedded system development.
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