W741L250 Datasheet, PDF (30/86 Pages) Winbond – 4-BIT MICROCONTROLLER

1/3 Bias 1/4 Duty Normal Lighting System, continued
LCD driver
outputs for
seg. on COM1
COM2 sides
being lit
LCD driver
outputs for
seg. on COM0
COM2,3 sides
being lit
LCD driver
outputs for
seg. on COM0
COM1,2,3 sides
being lit
W741L250
VDD3
VDD2
VDD1
VSS
VDD3
VDD2
VDD1
VSS
VDD3
VDD2
VDD1
VSS
The power connections for each LCD driving mode, which are determined by a mask option, are
shown below.
Static LCD Configuration
1/2 Bias LCD Configuration
DH1
DH2
DH1, DH2 floating
DH1
DH2
0.1uF
VSS
C
VDD
H
I
VDD
P
VDD1
VDD2
VSS
C
H
I
VDD
P
VDD1
VDD2
VDD
0.1uF
VDD3
VDD1 = VDD2 = VDD3 = VDD(1.5 V)
VDD3
VDD1 = VDD(1.5 V),
VDD2 = VDD3 = 2 VDD(3.0 V)
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