NJU6535

NJU6535 1/3 , 1/4 Duty LCD Driver GENERAL DESCRIPTION The NJU6535 is 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 NJU6535 chooses 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. PACKAGE OUTLINE NJU6535FH1 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-H1 C-MOS Technology (Substrate :P) Ver.2011-09-17 -1- NJU6535 PIN LOCATION S5 K0 K1 K2 K3 K4 VDD V0 V1 V2 VSS OSC SO CE SCL SI S4 S3 S2 SEG42/S1 SEG41/S0 SEG40/COM4 COM3 COM2 COM1 SEG39 SEG38 SEG37 SEG36 SEG35 SEG34 SEG33 SEG32 SEG31 SEG30 SEG29 SEG28 SEG27 SEG...