Fujitsu MB91401 manual Pin name Pin no, Function/application

Page 7

Prelminary

MB91401

2004.11.12

SYSTEM (9 pin)

Pin name

Pin no.

Polarity

I/O

Circuit

Function/application

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Clock input pin

XINI

8

IN

D

Input pin of clock generated in clock generator. 10 MHz to

 

 

 

 

 

 

 

50 MHz frequency can be input.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset input pin

 

 

Nega-

 

 

 

This pin inputs a signal to initialize the LSI.

INITXI

204

IN

D

When turning on the power supply, apply “0” to the pin until

tive

the clock signal input to the CLKIN pin becomes stable.

 

 

 

 

 

 

 

 

 

 

 

 

All built-in registers and external pins are initialized, and the

 

 

 

 

 

 

 

built-in PLL is stopped when “0” is asserted to INITXI.

 

 

 

 

 

 

 

 

 

NMIX

206

Nega-

IN

D

NMI input pin

tive

Non-Maskable Interrupt signal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INT7

150

 

 

 

 

 

External interrupt input pins

 

 

 

These pins input an external interrupt request signal.

INT6

87

IN

D

For external interrupt detection, set the ENIR, EIRR and

INT5

16

 

 

 

 

 

 

 

 

 

 

ELVR registers of the FR core.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MDI2

80

 

 

 

Mode pins

MDI1

142

IN

D

These pins determine the operation mode of the LSI.

MDI0

79

 

 

 

 

 

Always set this bit to “001”.

 

 

 

 

 

 

 

 

 

OSCILLATOR (3 pin)

 

 

 

 

 

 

 

Pin name

Pin no.

Polarity

I/O

Circuit

Function/application

 

 

 

 

 

 

 

 

 

OSCEA

12

IN

G

Crystal oscillation input pin

Input pin of crystal oscillation cell.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nega-

 

 

 

Crystal oscillation control input pin

OSCC

145

IN

D

Oscillation control pin of crystal oscillation cell.

tive

“0” : Oscillation

 

 

 

 

 

 

 

 

 

 

 

 

“1” : Oscillation stop

 

 

 

 

 

 

 

 

 

OSCEB

10

OUT

G

Crystal oscillation output pin

Output pin of crystal oscillation cell.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLL CONTROL (5 pin)

 

 

 

 

 

 

 

Pin name

Pin no.

Polarity

 

I/O

Circuit

 

Function/application

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLL/through mode (reset) switching input pin

 

PLLS

147

 

IN

D

“0” : PLL through mode (oscillation stop)

 

 

 

 

 

 

 

 

“1” : PLL oscillation mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input clock division ratio select input pin

 

PLLSET1

144

 

IN

D

 

“0” : Input clock direct

 

 

 

 

 

 

 

 

“1” : Input clock divided by 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Division ratio select input to PLL FB pin

 

PLLSET0

81

 

IN

D

“0” : Two dividing frequency is input to the terminal FB.

 

 

 

 

 

 

 

 

“1” : Four dividing frequency is input to the terminal FB.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLL bypass select input pin

 

PLLBYPAS

9

 

IN

D

 

“0” : PLL used

 

 

 

 

 

 

 

 

“1” : PLL unused

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input clock switching input pin

 

CLKSEL

77

 

IN

D

 

“0” : XINI (External clock)

 

 

 

 

 

 

 

 

“1” : Built-in OSC generating clock

 

 

 

 

 

 

 

 

 

 

7

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Contents Description FeaturesPackage USB Function Controller Packet filtering functionGeneral Purpose IO Gpio Memory InterfaceI2C Interface Card Interface CompactFlashIndex E F G H J K L M N P R T U V W PIN AssignmentPIN Number Table GND PIN DescriptionFunction/application Pin name Pin noICS0 BreakiICS2 ICS1 OUTSOUT0 SIN1SIN0 SOUT1MB91401 Rxcrs RxclkRxer RxdvEXD14 ExcsxEXA EXD15UCLK48 UDPUDM UsbinsCFD8 CFD15 CFD14 CFD13 CFD12CFD11 CFD10 CFD9MB91401 Pllvss SDASCL PllvddType Circuit Remarks Circuit TypeUSB I/O Circuit Remarks Handling Devices Separation of power supply patternPreventing Latch-up About power supply pins Treatment of the unused pinsTreatment of Open pins Treatment of output pinsAttached cable Part number Remarks Connected Specification of MB91401 and ICEUV CC Signal line name Wiring regulationsEvaluation MCU terminal name Pin treatment RSTOsceb Pin name FunctionCircuit constants Description Holding request withdrawal demand function OFF Bit data busOperation at start-up Treatment of Unused Input PinsAbout Mode pins MDI2 to MDI0 About watch dog timerORB AndhAndb ORHDMA Interrupt handler to NMI request tool Trace modeStep execution of Reti instruction Operand breakAuthentication macro Block DiagramMemory Space General Purpose Registers Register Mode SettingsMode Pins Mode Register ModrOperation mode Bit1, bit0 WTH1, WTH0 Bus width setting bitsFunction Remarks Address Register Block MAPUART0 DRCL0 W UTIMC0 R/W TIMER0DRCL1 W UTIMC1 R/W TIMER1 SIDR0 R/WBsdc Ichrc R/WBSD0 Xxxxxxxx BSD1 XxxxxxxxAddress Register Block DMADA1 Xxxxxxxx DMASA0 XxxxxxxxDMADA0 Xxxxxxxx DMASA1 Xxxxxxxx010FFFFF H Bsrr BCRR/W CCRR/W ADRR/W1XXXXXXX DARR/W BC2RR/W Xxxxxxxx00XXXXXX SIM if Smistatusr SIM if Xxxxxxxx SmiintenableSMICMDR/W SmicmdstExiftxrw Exifrxdr RExiftxdr W ExifrxrrCONT1R/W XXXXX0XX-XXX00000 XXXXXXXX-XXXXXXXXFIFO1R FIFO2W XXXXXXXX-XXXXXXXX FIFO3W XXXXXXXX-XXXXXXXXXXXXXXXX-X0000000 XXXXXXXX-XXX00000 Interrupt Address of TBR Interrupt source Offset Interrupt VectorDefault NMI Non Maskable Interrupt Interrupt Address of TBR Interrupt source OffsetΣiol Electrical CharacteristicsParameter Symbol Rating Unit MinTyp Parameter Symbol Value UnitTCK/TRST/TMS TDI/TDO CfresetParameter Pin Conditions Value Unit Min TypPin Conditions Value Unit Input Levels High driven Vcrs standard range Usbc VDDE/2Mclko Pin Conditions Reset ParameterUnit Remarks Min RDX Mclko ↑ Mclko ↑RDY Mclko ↑ Sclk ↑ SCK1, SCK0SOUT1, SOUT0 SIN1, SIN0Internal shift clock mode Rxdv Rxclk ↑ Txen Txclk ↑Rxer Rxclk ↑ Reception OUT → Mdio Mdclk ↑External if Parameter Symbol Pin Value Unit Remarks MinWrite access UDP, UDM USB interface Parameter Symbol PinFull-speed Buffer SDA Pclk 10 I2C interfacePclk SCL PclkCFCE2X, CFCE1X Card ifCFOEX, Cfiordx CDWEX, Cfiowrx Parameter SymbolValue Unit Remarks Min Max CFWEX, CfiowrxPart number Package Remarks Ordering InformationPackage Dimension Memo Asia Pacific JapanNorth and South America Europe

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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