SPEC No.

LCY-1210401A

MODEL No.

LS027B7DH01

PAGE

11

6-2) Power Supply Sequence

※

Refer to timing chart and AC timing characteristics for detail

※

1 ③ and ④ may be opposite (however, TCOM polarity inversion will not occur even with EXTCOMIN between

DISP=”L”. Also, when DISP and EXTCOMIN are simultaneously started up, allow 30us or more before SCS

starts up (It may be less than 60us).

※

2 Setting value for pixel memory initialization

SCS=Driving accordingly to clear pixel internal memory method (use all clear flag or write all screen white)

S1=M2 (all clear flag) = “H” or write white

SCLK: Normal Driving

【

Remark】 Cautions when powering on

Remark 1) VDD and VDDA should rise simultaneously or VDD should rise first.

Remark 2) VDD and VDDA shouldl simultaneously or VDD should fall first

①②

③※

1 ④※1

⑤⑥⑦

VDD/VDDA（5V）

GND

GND

DISP

GND

GND

EXTCOMIN

GND

GND

SCS

GND

※

2

※

2

GND

Others

GND

※

2

※

2

GND

Normal operation

Normal operation

Normal operation

T1

Off sequence

Normal operation

T2

T3

T4

T5

T6

T7

On Sequence

[ON Sequence]

(1) 5V rise time (depends on IC)

(2) Pixel memory initialization T2: 1V or more Initialize with M2 (all clear flag) or write all screen white

(3) Release time for initialization of TCOM latch

T3: 30us or more

Time required to release COM related latch circuit initialization which is initializing using DISP signals

(4) TCOM polarity initialization time

T4: 30us or more

Time required initializing TCOM polarity accordingly to EXTCOMIN input

[Normal Operation]

Duration of normal driving

[Off Sequence]

(5) Pixel memory initialization time

T5: 1V or more

(6) VA, VB, VCOM initialization time

T6: 1V or more

(7) 5V falling time (Depends on IC)