ML9204 Ver la hoja de datos (PDF) - Oki Electric Industry

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componentes Descripción

Fabricante

ML9204

5 × 7 Dot Character × 24-Digit × 2-Line Display Controller/Driver with Character RAM (Built-in Key Scan)

Oki Electric Industry 

OKI Semiconductor

PEDL9204-02

ML9204-xx

74 to 78 ROW1 to 5

91

RESET

72

OSC0

73

OSC1

Key matrix scan signal output pins.

Normally low level is output.

Key scanning starts by detecting depression or release

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Key matrix of key matrix switch and continues until selection of key

scan stop mode.

When key scan stop mode is selected, all outputs of

ROW1 to 5 return to low 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

l Micro controller • Display digit............................. 24 digits

• Brightness adjustment ............. 0/1024

• All lights ON or OFF ................ OFF mode

• ROW1 to 5 .............................. becomes low level

• INT.......................................... becomes low level

Pins for self-oscillation.

(Do not apply external clocks to these pins.)

Connect these pins to the crystal and capacitors or to

l

the ceramic resonator and capacitors.

Crystal or

ceramic

resonator

The target oscillation frequency is 4.0MHz.

(The device has an internal feedback resister.)

VDD

Typical

3.3V

1Mohm

5.0V 0.4Mohm

O

* For information regarding the oscillator contact the

manufacturer of the oscillator.

* As regards the circuit, refer to the Application Circuit.

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