Prelminary

MB91401

2004.11.12

(6) MII interface

Parameter

Symbol

Pin

Typical timing

 

Value

Unit

Remarks

 

 

 

Min

 

Max

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TXEN delay time

tdel_txen

TXEN

TXCLK ↑

0

 

15

ns

 

 

 

 

 

 

 

 

 

 

TXD delay time

tdel_txd

TXD3 to TXD0

TXCLK ↑

0

 

15

ns

 

 

 

 

 

 

 

 

 

 

RXDV setup time

tsu_rxdv

RXDV

RXCLK ↑

2

 

ns

 

 

 

 

 

 

 

 

 

 

RXSV Hold Time

thd_rxdv

RXDV

RXCLK ↑

3

 

ns

 

 

 

 

 

 

 

 

 

 

RXD setup time

tsu_rxd

RXD3 to RXD0

RXCLK ↑

2

 

ns

 

 

 

 

 

 

 

 

 

 

RXD Hold Time

thd_rxdv

RXD3 to RXD0

RXCLK ↑

3

 

ns

 

 

 

 

 

 

 

 

 

 

RXERsetup time

tsu_rxer

RXER

RXCLK ↑

2

 

ns

 

 

 

 

 

 

 

 

 

 

RXER Hold Time

thd_rxer

RXER

RXCLK ↑

3

 

ns

 

 

 

 

 

 

 

 

 

 

• Transmission

TXCLK

tdel_txen

TXEN

 

 

 

 

 

TXD3 to TXD0

X

5

5

 

 

tdel_txd

 

 

 

 

 

 

 

 

 

 

 

 

 

TXCLK

 

 

 

 

 

TXEN

 

 

tdel_txen

 

 

 

 

 

 

 

 

 

TXD3 to TXD0

n−1

n

X

 

 

tdel_txd

 

 

 

 

 

 

 

59

Page 59
Image 59
Fujitsu MB91401 manual Txen Txclk ↑, Rxdv Rxclk ↑, Rxer Rxclk ↑

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.