LC75857E Datasheet, PDF (23/39 Pages) Sanyo Semicon Device – CMOS IC 1/3, 1/4 Duty LCD Display Drivers with Key Input Function

1/4 Duty, 1/2 Bias Drive Technique
LC75857E, LC75857W
COM1
COM2
COM3
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 LCD segments corresponding
to COM2 and COM4 are on.
LCD driver output when all LCD segments corresponding to
COM1, COM2, COM3 and COM4 are on.
fo[Hz]
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
1/4 Duty, 1/2 Bias Waveforms
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
f0 = ^fosc = ^fCK
768 768
f0 = ^fosc = ^fCK
576 576
f0 = ^fosc = ^fCK
384 384
f0 = ^fosc = ^fCK
288 288
f0 = ^fosc = ^fCK
192 192
No. 7980-23/39