Prelminary

 

 

 

 

MB91401

2004.11.12

 

 

 

 

 

 

 

 

 

 

 

 

 

(Continued)

 

 

 

 

 

 

 

Pin name

Pin no.

Polarity

I/O

Circuit

Function/application

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Card connection detect input pin : CFCD1X

 

 

CFCD1X

58

Nega-

IN

E

Checking connection pin of the socket and CompactFlash

 

 

tive

card. It is shown that the CompactFlash card was connected

 

 

 

 

 

 

 

 

 

 

 

 

 

when this signal and CFCD2X are both input by “0”.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CF side GND input pin

 

 

 

 

Nega-

 

 

GND level detection pin from CompactFlash side.

 

 

CFVS1X

230

IN

E

The “0” input to the pin assumes that the CompactFlash

 

 

tive

 

 

 

 

 

 

card can operate at 3.3 V, setting the CFVCC3EX pin to the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

“L” level.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CF ready input pin : memory card

 

 

 

 

 

 

 

Ready input pin from CompactFlash memory card side

 

 

 

 

Posi-

 

 

“1” : Ready

 

 

CFRDY

60

tive

IN

E

“0” : Busy

 

 

(CFIREQ)

(Nega-

(CF interrupt : I/O card)

 

 

 

 

 

 

 

 

 

tive)

 

 

Interrupt request pin of CompactFlash I/O card. It is shown

 

 

 

 

 

 

 

the interrupt request was done from the I/O card when input

 

 

 

 

 

 

 

to this signal by “0”.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cycle wait input pin during CF execution

 

 

 

 

 

 

 

Cycle wait input pin from CompactFlash card side

 

 

CFWAITX

125

Nega-

IN

E

“0” : It is shown that there is a wait demand at the cycle

 

 

tive

under execution.

 

 

 

 

 

 

 

 

 

 

 

 

 

“1” : It is shown that there is no wait demand at the cycle

 

 

 

 

 

 

 

under execution.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CF3.3 V power enable output pin

 

 

 

 

 

 

 

Outputs “L” level when the CompactFlash card is operable

 

 

CFVCC3EX

234

Nega-

OUT

B

at 3.3 V.

 

 

tive

The output signal enables 3.3-volt power supply to the

 

 

 

 

 

 

 

 

 

 

 

 

 

CompactFlash card. The pin outputs “L” level only when the

 

 

 

 

 

 

 

CFVS1X pin detects “0”; otherwise, the pin outputs “H”.

 

 

 

 

 

 

 

 

 

 

 

 

Posi-

 

 

CF reset output pin

 

 

CFRESET

184

OUT

A

Reset output pin to CompactFlash card side.

 

 

tive

 

 

 

 

 

 

CompactFlash is reset at “H” output.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nega-

 

 

CF read strobe output pin

 

 

CFOEX

127

OUT

B

Read strove output pin to CompactFlash card (memory

 

 

tive

 

 

 

 

 

 

mode and Attribute memory area)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CF register write output pin

 

 

 

 

Nega-

 

 

Write clock output pin to CompactFlash card (register write

 

 

CFWEX

62

OUT

B

and Card Configuration Register area).

 

 

tive

 

 

 

 

 

 

The register write is executed at the rising edge from “L” to

 

 

 

 

 

 

 

 

 

 

 

 

 

 

“H”.

 

 

 

 

 

 

 

 

 

 

CFIORDX

64

Nega-

OUT

B

CFIO read strobing output pin

 

 

tive

Read strove output pin to CompactFlash card (I/O mode)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CFIOWRX

129

Nega-

OUT

B

CFIO write strobing output pin

 

 

tive

Write strove output pin to CompactFlash card (I/O mode)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

Page 15
Image 15
Fujitsu MB91401 manual

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.