PEDL9044A-04
OKI Semiconductor
ML9044A-xxA/xxB
Symbol
CSR
Description
The input pin to select the transfer direction of the common signal output data.
At 1/n duty, data is transferred from COM1 to COMn when “L” is applied to this pin and
transferred from COMn to COM1 when “H” is applied to this pin.
The input pin to select the transfer direction of the segment signal output data.
“L”: Data transfer from SEG
1
to SEG
120
“H”: Data transfer from SEG
120
to SEG
1
The pins to output bias voltages to the LCD.
SSR
V
1
, V
2
, V
3A
, V
3B
, V
4
For 1/4 bias : The V
2
and V
3B
pins are shorted.
For 1/5 bias : The V
3A
and V
3B
pins are shorted.
The input pin to enable or disable the voltage multiplier circuit.
"L" disables the voltage multiplier circuit. "H" enables the voltage multiplier circuit.
BE
The voltage multiplier circuit doubles the input voltage between V
DD
and V
IN
and the
multiplied voltage referenced to V
DD
is output to the V
5IN
pin. The voltage multiplier
circuit can be used only when generating a level lower than GND.
The pin to input voltage to the voltage multiplier.
The pins to supply the LCD drive voltage.
The LCD drive voltage is supplied to the V
5
pin when the voltage multiplier is not used
(BE = “0”) and the internal contrast adjusting circuit is also not used. At this time, the
V
5IN
pin should be open.
V
IN
V
5
, V
5IN
The LCD drive voltage is supplied to the V
5IN
pin when the voltage multiplier is not used
(BE = “0”) but the internal contrast adjusting circuit is used. At this time, the V
5
pin
should be open.
When the voltage multiplier is used (BE = “1”), the V
5
pin should be open (the
multiplied voltage is output to the V
5IN
pin). In this case, the internal contrast adjusting
circuit must be used. Capacitors for the voltage multiplier should be connected
between the V
DD
pin and the V
5IN
pin.
V
C
V
CC
The pin to connect the positive pin of the capacitor for the voltage multiplier. Leave the
pin open when the voltage multiplier circuit is not used.
The pin to connect the negative pin of the capacitor used for the voltage multiplier.
Leave the pin open when the voltage multiplier circuit is not used.
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