NJU6475B

Note-1 : If the LSI are used on condition above the absolute maximum ratings, the LSI may be destroyed. Using the LSI within electrical characteristics is strongly recommended for normal operation. Use beyond the electric characteristics conditions will cause malfunction and poor reliability.
Note-2 : Decoupling capacitor should be connected between VDD and VSS due to the stabilized operation for the voltage converter.
Note-3 : All voltage value are specified as V_SS = 0V.
The relation : V_DD > V_SS, V_DD > V_SS V5out, V_SS = 0V must be maintained.

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 of NJU6475B 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 of NJU6475B 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 NJU6475B consisting of 10,080bits stores 252 kinds of character Font.

Each 160bits CG RAM and Icon display RAM can story 4 kinds of special character to display on the dot matrix display area or 128 kinds of Icon on the display area.