GENERAL DESCRIPTION

The NJU3430 is a Dot Matrix VFD (Vacuum Fluorescent Display)The NJU3430 is a Dot Matrix VFD (Vacuum Fluorescent Display) Controller Driver for 16-character 1-line with Icon display.Controller Driver for 16-character 1-line with Icon display. It contains character generator ROM/RAM, address counter, oscilla- It contains character generator ROM/RAM, address counter, oscillation circuit, command register, Icon display RAM, high voltage drivers,tion circuit, command register, Icon display RAM, high voltage drivers, and serial interface circuit.and serial interface circuit. The display data or the command data is transmitted with the serial The display data or the command data is transmitted with the serial interface circuits.interface circuits.

The character generator consists of 8,400 bits ROM and 35 x 8 bits The character generator consists of ,400 bits ROM and 35 x 8 bits RAM. The CG RAM stores 8 kinds of character by 5 x 7dots maxi-RAM. The CG RAM stores 8 kinds of character by 5 x 7dots maximum.

The 16-common and 37-segment (35 for character, 2 for icon) drivers The 16-common and 37-segment (35 for character, 2 for icon) drivers operated up to 45V drive the display of 16-character 1-line with 32-operated up to 45V drive the display of 16-character 1-line with 32-Icon.

Furthermore, the NJU3430 incorporates one Output port which drives Furthermore, the NJU3430 incorporates one Output port which drives the LED.the LED.

FEATURES

16-character 1-line Dot Matrix VFD Controller Driver16-character 1-line Dot Matrix VFD Controller Driver

Serial Interface with MicroprocessorSerial Interface with Microprocessor

Display Data RAMDisplay Data RAM 16 x 8 bits16 x 8 bits : 16-character 1-line Display: 16-character 1-line Display

Character Generator ROMCharacter Generator ROM 8,400 bits8,400 bits : 240 Characters for 5 x 7 Dots: 240 Characters for 5 x 7 Dots

Character Generator RAMCharacter Generator RAM 35 x 8 bits35 x 8 bits : 8 Patterns (5 x 7 Dots): 8 Patterns (5 x 7 Dots)

Icon Display RAMIcon Display RAM 16 x 2 bits16 x 2 bits : Maximum 32 Icon: Maximum 32 Icon

VFD Driving VoltageVFD Driving Voltage | V| VDD-VFDP| £ 45V

Timing SignalTiming Signal : 16: 16

Segment SignalSegment Signal : 35 (Except for Icon Segment Signal): 35 (Except for Icon Segment Signal)

Output Port for LED : 1Output Port for LED : 1

Display ON/OFF FunctionDisplay ON/OFF Function

Digit Scan FunctionDigit Scan Function

Display Duty (Contrast Control) : 8-step (8/16 to 15/16)Display Duty (Contrast Control) : 8-step (8/16 to 15/16)

Character / Icon Shift FunctionCharacter / Icon Shift Function

Display Mode (9 to 16 Digits)Display Mode (9 to 16 Digits)

Oscillation Circuit on-chip (External Resistor and Capacitor Required)Oscillation Circuit on-chip (External Resistor and Capacitor Required)

Operating VoltageOperating Voltage 3.0V to 5.5V (Except VFD Driving Voltage)3.0V to 5.5V (Except VFD Driving Voltage)

Package OutlinePackage Outline QFP 64QFP 64

C-MOS TechnologyC-MOS Technology