GENERAL DESCRIPTION
The NJU6535is a 1/3 or 1/4 duty LCD driver for segment type LCD panel with key scan function
transmitting the 30 keys maximum scanned data (6 x 5 =  30) to CPU. 
The NJU6535chooses numbers of common, key scan, and general purpose ports by instructions. Therefore, It drives 126 segments at 1/3 duty in use of 3 commons and 42 segments or 164 segments at 1/4 duty in use of 4 and 41. Also it provides 4 general purpose output ports maximum to drive LEDs or others directly. Furthermore, the NJU6535 can select a LCD driving
voltage out of 8 steps voltage by the instruction to adjust the display contrast of LCD panel.

FEATURES
42-segment Drivers
Programmable Duty Ratio
1/3 Duty : 126-segment (Maximum)
1/4 Duty : 164-segment (Maximum)
30-key Scan Function (6X5 matrix) 
   Needless for anti-reverse current diodes in key scan
Programmable Bias Ratio   1/2, 1/3 bias
Output Port for LED (maximum 4 LED)
Serial Interface (SI, SO, SCL, CS)
Useful Instruction set
Incorporated LCD Driving Voltage Generator Circuits
Electrical Variable Resistance (8-step)
Logic Operating Voltage   4.5 ~ 5.5V
LCD Driving Voltage   ~5.5V
Package Outline   QFP64-G1
                        QFP64-H1
C-MOS Technology (Substrate :P)