General Description
The HL15703 is 1/3 duty LCD display driver. It can drive directly maximum 171 segments. Also it has four general purpose output ports and a key scan function that accepts input from up to 30 keys.

FEATUREs
• LCD display ..................................... 57 segments x 3 commons
    1/3 duty - 1/2 bias
    1/3 duty - 1/3 bias
• Key scan ............................................ Maximum 30 keys
    Input 5 pins, Output 6 pins
• Power down mode ............................. Sleep mode and all segments off mode
• Port
    Output .................................................. 4 pins ( Including the LCD segment port )
• Serial I/O .............................................. Data transfer and receive
• Power on reset ..................................... Supply voltage detection ( SVD )
• RC oscillator
• Package ............................................... 80QFP