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NJU6535

1/3 , 1/4 Duty LCD Driver

Japan Radio Corporation  

NJU6535

Preliminary

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.

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)

PACKAGE OUTLINE

NJU6535FG1

NJU6535FH1

02/08/06

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