ML9208 データシートの表示（PDF） - Oki Electric Industry

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ML9208

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

Oki Electric Industry 

OKI Semiconductor

FEDL9208-01

ML9208

PIN DESCRIPTION

Pin

Symbol Type Connects to

QFP SSOP

Description

1 to 31,

5 to 39 SEG1 to 35 O

61 to 64

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

General port output.

LED drive

O control pins 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.

Serial data input (positive logic).

55

63

DA

I Microcontroller

Input from LSB.

54

62

CP

Shift clock input.

I Microcontroller Serial data is shifted on the rising edge of CP.

53

61

CS

Chip select input.

I Microcontroller Serial data transfer is disabled when CS pin is “H” 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 ⋅⋅⋅⋅⋅⋅⋅ 8/16

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.

5/33

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