lc75857e Sanyo Semiconductor Corporation, lc75857e Datasheet - Page 24

• Manufacturer Part Number: lc75857e
• Description: 1/3, 1/4 Duty Lcd Display Drivers With Key Input Function
• Manufacturer: Sanyo Semiconductor Corporation

1/4 Duty, 1/3 Bias Drive Technique
COM1
COM2
COM4
LCD driver output when all LCD segments corresponding to
COM1, COM2, COM3 and COM4 are turned off.
LCD driver output when only LCD segments
corresponding to COM1 are on.
LCD driver output when only LCD segments
corresponding to COM2 are on.
LCD driver output when LCD segments corresponding
to COM1 and COM2 are on.
LCD driver output when only LCD segments
corresponding to COM3 are on.
LCD driver output when LCD segments corresponding
to COM1 and COM3 are on.
LCD driver output when LCD segments corresponding
to COM2 and COM3 are on.
LCD driver output when LCD segments corresponding
to COM1, COM2 and COM3 are on.
LCD driver output when only LCD segments
corresponding to COM4 are on.
LCD driver output when all LCD segments corresponding to
COM1, COM2, COM3 and COM4 are on.
COM3
LCD driver output when LCD segments corresponding
to COM2 and COM4 are on.
Note: When FC0 = 0, FC1 = 0, and FC2 = 0 in the control data
When FC0 = 0, FC1 = 0, and FC2 = 1 in the control data
When FC0 = 0, FC1 = 1, and FC2 = 0 in the control data
When FC0 = 0, FC1 = 1, and FC2 = 1 in the control data
When FC0 = 1, FC1 = 0, and FC2 = 0 in the control data
LC75857E, LC75857W
fo[Hz]
1/4 Duty, 1/3 Bias Waveforms
f
f
f
f
f
0
0
0
0
0
=
=
=
=
=
f
f
f
f
f
768
576
384
288
192
osc
osc
osc
osc
osc
=
=
=
=
=
f
f
f
f
f
768
576
384
288
192
CK
CK
CK
CK
CK
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
VLCD
VLCD1
VLCD2
0V
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