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Lista de partido

ML9208A-XX

5 x 7 Dot Character x 16-Digit Display Controller/Driver with Character RAM

LAPIS Semiconductor Co., Ltd. 

FEDL9208A-02

ML9208A-xx

PIN DESCRIPTION

Pin

QFP /

TQFP

SSOP

Symbol

Type Connects to

Description

1 to 31,

61 to 64

5 to 39

SEG1 to 35

O

Fluorescent

tube anode

electrode

Fluorescent display tube anode electrode drive output.

Directly connected to fluorescent display tube and a

pull-down resistor is not necessary. IOH > –6 mA

32 to 47 40 to 55 COM1 to 16 O

Fluorescent

tube grid

electrode

Fluorescent display tube grid electrode drive output.

Directly connected to fluorescent display tube and a

pull-down resistor is not necessary. IOH > –30 mA

59, 60 3, 4 AD1, AD2 O

Fluorescent

tube anode

electrode

Fluorescent display tube anode electrode drive output.

Directly connected to fluorescent display tube and a

pull-down resistor is not necessary. IOH > –15 mA

57, 58 1, 2

P1, P2

O

LED drive

control pins

General port output.

Output of these pins in static operation, so these pins can

drive the LED.

56

64

49

57

48

56

VDD

GND

VFL

VDD-GND are power supplies for internal logic.

— Power supply VDD-VFL are power supplies for driving fluorescent tubes.

Apply VFL after VDD is applied.

55

63

DA

I

Microcontroller

Serial data input (positive logic).

Input from LSB.

54

62

CP

I

Microcontroller

Shift clock input. Serial data is shifted on the rising edge of

CP when CS pin is “L” level.

53

61

CS

I

Microcontroller

Chip select input.

Serial data transfer is enabled when CS pin is “L” level.

Reset input.

“Low” initializes all the functions.

Initial status is as follows.

 Address of each RAM  address “00”H

 Data of each RAM  Content is undefined

 Display digit  16 digits

52

60

RESET

I

Microcontroller  Contrast adjustment  0/16

or C2, R2

 All lights ON or OFF  OFF mode

 All outputs  “Low” level

RESET

C2

R2

(Circuit when R and C are

connected externally)

See Application Circuit.

50

58

OSC0

I

51

59

OSC1

O

C1, R1

External RC pin for RC oscillation.

Connect R and C externally. The RC time constant

depends on the VDD voltage used. Set the target oscillation

frequency to 2 MHz.

OSC0

R1

OSC1

(RC oscillation circuit)

C1 See Application Circuit.

5/35

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