MSM6606 Ver la hoja de datos (PDF) - Oki Electric Industry

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MSM6606

80-DOT LCD DRIVER WITH KEY MATRIX

Oki Electric Industry 

¡ Semiconductor

FEDL6606-03

MSM6606

FUNCTIONAL DESCRIPTION

Pin Functional Description

• OSC

This is an input pin for the oscillator to generate LCD display and keyscan signals. Connect

an external capacitor and a resistor as shown below to form an RC oscillation circuit.

The relationship between frame frequency fFRM, keyscan period TSCN, and oscillation

frequency fOSC is:

TSCN = 15/fOSC, fFRM = fOSC/32

(See the reference data for information on relationship between CO and RO values, and frame

frequency or keyscan periods.)

VDD

RO

OSC

CO

• Data I/O

This is a serial data input/output. The pin is in output state from the first shift clock rise after

"Key Data Output" command writing, to the load signal rise, and in input state otherwise.

(The pin is in input state after reset.)

The relationship between the data level and operation is as shown below:

Level

"H"

"L"

Display

ON

OFF

Key Status

ON (close)

OFF (open)

• CLOCK

This is an input pin for the shift clock. DATA I/O pin data is either input or output in

synchronization with the rising edge of the clock.

• LOAD

This is a load signal input pin used to transfer serial input data to a latch for display, to write

commands, or to reset the DATA I/O pin to an input state.

• BLANK

This is a display blanking signal input pin. At "H" level the LED and LCD displays go out

regardless of the display data. The display returns to the original status at "L" level.

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