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 SEG1 to SEG120
SSR
“H”: Data transfer from SEG120 to SEG1
The pins to output bias voltages to the LCD.
V1 , V2, V3A, V3B, V4
For 1/4 bias : The V2 and V3B pins are shorted.
For 1/5 bias : The V3A and V3B 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
VIN
The voltage multiplier circuit doubles the input voltage between VDD and VIN and the
multiplied voltage referenced to VDD is output to the V5IN 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 V5 pin when the voltage multiplier is not used
(BE = “0”) and the internal contrast adjusting circuit is also not used. At this time, the
V5IN pin should be open.
The LCD drive voltage is supplied to the V5IN pin when the voltage multiplier is not used
(BE = “0”) but the internal contrast adjusting circuit is used. At this time, the V5 pin
should be open.
V5, V5IN
When the voltage multiplier is used (BE = “1”), the V5 pin should be open (the
multiplied voltage is output to the V5IN pin). In this case, the internal contrast adjusting
circuit must be used. Capacitors for the voltage multiplier should be connected
between the VDD pin and the V5IN pin.
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.
VC
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.
VCC
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