SPEC No.

LCY-12T09302A

MODEL No.

LS013B4DN01

PAGE

16

6-5-5 COM Inversion

There are two signals, one is COM signal with serial Input(EXTMODE=”L”)

and other is external COM signal input (EXTMODE=”H”).

SCS

SI

COM

・

M1：LC polarity inversion flag: If M1is "H" then VCOM="H" is output. If M1 is "L" then VCOM="L" is output.

※

1：LC inversion has been changed by M1 flag statement.

※

2：The periods of plus polarity and minus polarity should be same length as much as possible.

SCS

EXTCOMIN

COMZ

COM

※

1：LC inversion polarity has been set by the rising timing of EXTCOMIN in internal circuit block as COMZ signal,

and when SCS become falling timing, LC inversion has been activated as COM signal.

※

2：The period of EXTCOMIN should be constant.

＜EXTMODE="L"＞＜EXTMODE="H"＞

※Qn-1：COM has been changed polarity when SCS meet falling edge.

COM

HH

Qn-1

Qn-1

LL

H

COMZ

HH

反転前

反転後

LL

L

H

HL

L

H

H

EXTCOMIN

L

反転前

反転後

COM

EXTCOMIN

M2

M1

M2

M0

M1

COMZ

SCS="L" SCS="H"

M0

M1

M2

H

M0

L

反転前

L

反転後

fCOM

※2

※2

※1

※1

※1

EXTMODE="L"

fCOM

※2

※2

※1

EXTMODE="H"

Truth table of COM

※1

※1

fEXTCOMIN

Depend on

status of M1

twEXTCOMIN

In rising timing of EXTMODE,

internal signal "COMZ" is inverted.

(COMZ status has been fixed by signal SCS)