LC450029PKB

www.onsemi.com

18

 In external clock operating mode

(Note) The wait time (t1) which power supply turn on should be 1ms or more.

The discharge time (t2) of LCD panel’s electric charge should be decided the optimum value according to the

characteristic of the LCD panel.

The switching time (tc) of INH should be 10

s or more.

OSCI pad should be input an external clock at INH is high level.

[Figure 7]

 All segments off (off waveforms output)

[Figure 8]

 Power-saving mode

[Figure 9]

CE

t1

VDD=VDDI

OSCI

t2

VIL1

tc

VIL1

Initialization of display data

and control data (OC=1)

Update display data

OFF (VSS level output)

ON

OFF (VSS level output)

S1 to S53

COM1 to COM4

INH

CE

VDD=VDDI

S1

VSS

VSS

SC=1

SC=0

VSS

COM1

VSS

OFF

(off waveforms output)

Initialization of display data

and control data (SC=0)

OFF (VSS level output)

ON

ON

OFF

(VSS level output)

INH

CE

VDD=VDDI

S1 to S53

COM1 to COM4

BU=1

BU=0

Initialization of display data

and control data (BU=0)

OFF

(VSS level output)

OFF

(VSS level output)

OFF

(VSS level output)

ON

ON

Power-saving mode

INH