The NJU6475B is a Dot Matrix LCD Controller Driver for 12-character 4-line with Icon display in single chip. It contains voltage converter, voltage regulator, bleeder resistance, CR oscillator, instruction decoder, character generator ROM/RAM, high voltage operation controller/driver and key scan circuit. The voltage converter generates (about 8V) from the supply voltage (3V) and regulated by the regulator. The bias level of LCD driving voltage is generated of high value bleeder resistance and the buffer amplifier matches the impedance. 16-step contrast control function is incorporated for its adjustment. Therefore, simple power supply circuit and easy contrast adjustment are available. The complete CR oscillator is incorporated without external components for oscillation circuit. The microprocessor interface circuit which operates by 1MHz, can be selected serial interface. The character generator ROM consisting of 10,080bits stores 252 kinds of character Font.