NJU6543 Ver la hoja de datos (PDF) - Japan Radio Corporation

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componentes Descripción

Fabricante

NJU6543

1/2 1/3 1/4 Duty LCD Driver

Japan Radio Corporation  

Preliminary NJU6543

(4) Command Register2

• Command Register2 is used to set the oscillator, driving waveform, and E.V.R. resister set. When the D7 to D6

bits of the 1st word are (1,1), the D5 ~ D0 bits are recognized as command data.

The contents of Command Register will be initialized as following when applying Power On Reset or Reset.

The Default Value of Command Register

• Oscillator selection

• Driving waveform

• E.V.R. Register Set

• Display

: External resistor and capacitor

: A(Time sharing system frequency) waveform

: V0(0,0,0)

:OFF

D7

D6

D5

D4

D3

D2

D1

D0

1

0

EXOSC WSEL

E2

E1

E0

SC

Flag bits

• Oscillator selection

EXOSC

0

1

Oscillator Driving

E.V.R. register set

selection wave form

Oscillator circuit

External resistor and capacitor

External oscillation signal input

Display

• Driving waveform

WSEL

Driving waveform

0

A(Time sharing system frequency) waveform

1

B(Flame reversal) waveform

Driving waveform is chosen according to the characteristic of a panel.

• E.V.R. resister set

E.V.R. resistor set instruction adjusts the contrast of the LCD, by 3-bits selects(E2,E1,E0).

One LCD driving voltage VLCD out of 8 voltage-stages by setting E.V.R. register.

Set the binary code “000” when contrast adjustment is unused.

E2 E1 E0

V1

1/2bias

1/3bias

VLCD (V0~VSS )

0

0

0

0

0

1

0

1

0

0

1

1

1

0

0

1

0

1

1

1

0

1

1

1

V0

0.933V 0

0.875V 0

0.824V 0

0.778V 0

0.737V 0

0.700V 0

0.667V 0

V0

0.955V 0

0.913V 0

0.875V 0

0.840V 0

0.808V 0

0.778V 0

0.750V 0

High

:

:

:

:

:

:

Low

Ver.2008-11-28

-7-

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