MB89945 데이터 시트보기 (PDF) - Fujitsu

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MB89945

8-bit Proprietary Microcontroller

Fujitsu 

MB89940 Series

s PIN DESCRIPTION

Pin no.

QFP*1

MQFP*2

5

5

Pin name

X0

6

6

X1

48

48

MODE

2

2

RST

34 to 27

34 to 27 P00/SEG00 to

P07/SEG07

26 to 20,

18

26 to 20, P10/SEG08 to

18

P17/SEG15

17

17

P20/SEG16

16

16

P21/V0

15

15

P22/EC/V1

14

14

P23/TO/V2

13

13

P24/V3

12, 11, 10

35

12, 11, 10

35

P25/INT0 to

P27/INT2

P30/FUELO

*1: FPT-48P-M16

*2: MQP-48C-P01

6

Circuit

type

A

B

C

H

J

I

F

F

F

F

E

D

Function

Pin for connecting the crystal resonator.

X0 and X1 can be directly connected to a crystal

oscillator.

When the oscillation clock is provided to X0

externally, X1 should be left open.

The mode input is used for entering the MPU into the

test mode.

In user applications, MODE is connected to VSS.

Applying a reset pulse to this pin forces the MPU to

enter the initial state. RST is active low and drives

low state when an internal reset occurs.

Reset pulses of the duration less than the minimum

pulse width may cause the MCU to enter undefined

states.

These pins have two functions.

Their functions can be switched between Port 0 and

LCD segment signal outputs by setting the internal

registers of the LCD controller.

These pins have two functions.

Their functions can be switched between Port 1 and

LCD segment signal outputs by setting the internal

registers of the LCD controller.

This pin can be used as the bit 0 of Port 2 or an LCD

segment signal output by setting the internal register

of the LCD controller.

This pin is the bit 1 of Port 2.

This pin can also be used for an external LCD bias

voltage input.

This pin can be used as the bit 2 of Port 2 or the

external clock input for the interval timer.

This pin can also be used for an external LCD bias

voltage input.

This pin can be used as the bit 3 of Port 2 or the

output for the interval timer.

Its function can be switched by setting the internal

register of the interval timer.

This pin can also be used for an external LCD bias

voltage input.

This pin can be used as the bit 4 of Port 2 or an

external LCD bias voltage input.

These pins are used for Port 2.

They can also be used for external interrupt inputs.

This pin can be used for the bit 0 of Port 3 or the

output from PWM3.

The function of this pin can be switched by setting

the internal register of PWM3.

(Continued)

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