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NJU6543

Ver.2008-11-28

Preliminary

(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 1

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

: External resistor and capacitor

• Driving waveform

: A(Time sharing system frequency) waveform

• E.V.R. Register Set

: V0(0,0,0)

• Display

:OFF

D7

D6

D5

D4

D3

D2

D1

D0

1

0

EXOSC

WSEL

E2

E1

E0

SC

•

Oscillator selection

EXOSC

Oscillator circuit

0

External resistor and capacitor

1

External oscillation signal input

•

Driving 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.

V1

E2

E1

E0

1/2bias

1/3bias

0

0

0

High

0

0

1

:

0

1

0

:

0

1

1

:

1

0

0

:

1

0

1

:

1

1

0

:

1

1

1

Low

WSEL

Driving waveform

0

A(Time sharing system frequency) waveform

1

B(Flame reversal) waveform

Flag bits

Oscillator

selection

E.V.R. register set

Driving

wave form

Display