Prelminary

 

 

 

 

MB91401

2004.11.12

 

 

 

 

 

 

 

 

 

 

 

 

 

ETHERNET MAC CONTROLLER (17 pin)

 

 

 

 

Pin name

Pin no.

Polarity

I/O

Circuit

Function/application

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Clock input for reception pin

 

 

RXCLK

48

IN

D

MII sync signal during reception. The frequency is 2.5 MHz

 

 

 

 

 

 

 

at 10 Mbps and 25 MHz at 100 Mbps.

 

 

 

 

 

 

 

 

 

 

 

 

Posi-

 

 

Receive error input pin

 

 

RXER

113

IN

D

It is recognized that there is an error in the reception packet

 

 

tive

 

 

 

 

 

 

when “1” is input from the PHY device at receiving.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RXDV

172

Posi-

IN

D

Receive data valid input pin

 

 

tive

It is recognized that receive data is effective.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Posi-

 

 

Career sense input pin

 

 

RXCRS

115

IN

D

The state that the reception or the transmission is done is

 

 

tive

 

 

 

 

 

 

recognized.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RXD3

114

 

 

 

 

 

 

RXD2

47

IN

D

Receive data input pins

 

 

RXD1

112

4-bit data input from PHY device.

 

 

 

 

 

 

 

RXD0

45

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Collision detection input pin

 

 

COL

173

Posi-

IN

D

When TXEN signal is active and “1”, the collision is

 

 

tive

recognized. The collision is not recognized without these

 

 

 

 

 

 

 

 

 

 

 

 

 

conditions.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Clock input for transfer pin

 

 

TXCLK

46

IN

D

It becomes synchronous of MII when transmitting. The

 

 

 

 

 

 

 

frequency is 2.5 MHz at 10 Mbps and 25 MHz at 100 Mbps.

 

 

 

 

 

 

 

 

 

 

 

 

Posi-

 

 

Transfer enable output pin

 

 

TXEN

43

OUT

F

It is shown that effective data is on the TXD bus. It is output

 

 

tive

 

 

 

 

 

 

synchronizing with TXCLK.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TXD3

171

 

 

 

Transfer data output pins

 

 

TXD2

170

 

 

 

 

OUT

F

4-bit data bus sent to the PHY device. It is output

 

 

TXD1

111

 

 

 

 

 

synchronizing with TXCLK.

 

 

TXD0

44

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SMI clock output pin

 

 

MDCLK

222

OUT

F

SMI IF clock pin

 

 

 

 

 

 

 

Connect to SMI clock input pin of PHY device.

 

 

 

 

 

 

 

 

 

 

MDIO

224

I/O

B

SMI data input/output pin

 

 

Connect to SMI data of PHY device.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Image 11
Fujitsu MB91401 Rxclk, Rxer, Rxdv, Rxcrs, RXD3, RXD2, RXD1, RXD0, Col, Txclk, Txen OUT, TXD3, TXD2, TXD1, TXD0, Mdclk

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.