MB91401

Prelminary

2004.11.12

 

 

Precaution when designing

When evaluation MCU on the user system is operated in the state that the emulator is not connected, should be treated as follow each input terminal of evaluation MCU connected with the emulator interface on the user system.

Therefore, note that the switch circuit etc, might become necessary in the user system when you design.

The terminal processing in each emulator interface is shown as follows.

Pin treatment of emulator interface (DSU-3)

Evaluation MCU terminal name

 

Pin treatment

 

 

 

 

 

RST

 

 

To be connected the RST terminal with the reset output circuit in the

 

 

user system.

 

 

 

 

 

 

 

 

Others

 

 

To open.

 

 

 

 

 

Emulator interface wiring regulations

 

 

 

Signal line name

 

 

Wiring regulations

 

 

 

 

ICLK

The total wiring length of each signal (From evaluation MCU pin to the

 

ICS2 to ICS0

 

emulator interface connector pin) is made within 50 mm.

 

ICD3 to ICD0

The difference of the total wiring length of each signal makes within 2 cm

 

BREAKI

 

and the total wiring length of ICLK is the shortest.

 

 

 

 

 

Wire the pattern with capacity more than the ratings current.

 

UVCC

Each power supply and GND may cause a short-circuit or reverse connec-

 

 

tion in between by a wrong connection of a probe. Insert a protection circuit

 

 

 

 

 

 

such as a fuse into each power supply pattern to safeguard it.

 

 

 

 

GND

Connect directly with a power supply system pattern such as grandopran.

 

 

 

 

 

 

Reference document

Please match and refer to the following manual for the connection with ICE.

DSU-FR Emulator MB2198-01 Hardware Manual

FR20/30 series MB2197-01 Hardware Manual

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Fujitsu MB91401 manual Evaluation MCU terminal name Pin treatment, Rst, Signal line name Wiring regulations, Uv Cc

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.