NJU6475B データシートの表示（PDF） - Japan Radio Corporation

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NJU6475B

12-Character 4-Line Dot Matrix Low Power LCD Controller Driver with key Scan Function

Japan Radio Corporation  

NJU6475B

12-Character 4-Line Dot Matrix Low Power

PRELIMINARY

LCD Controller Driver with key Scan Function

GENERAL DESCRIPTION

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 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 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 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.

PACKAGE OUTLINE

NJU6475B

FEATURES

•12-Character 4-Line Dot Matrix LCD Controller Driver

•Maximum 128-Icon Display

•Serial CPU Interface

•Display Data RAM

- 48 x 8 Bits :Maximum 12-Character 4-Line Display

•Character Generator ROM

- 10,080 Bits:252 Characters (5 x 8 Dots)

•Character Generator RAM

- 32 x 5 Bits :4 Patterns (5 x 8 Dots)

•Icon Display RAM

- 32 x 5 Bits :Maximum 128-Icon

•High Voltage LCD Driver

: 37-Common/63-Segment

•Duty & Bias Ratio

: 1/36 duty 1/7Bias

•Useful Instruction Set

: Clear Display, Return Home, Display On/Off Control

Display Blink,Cursor Shift, Character Shift

•Common and Segment Driver location Order Select Function (Mode-A, Mode-B)

•Power On Reset Circuit On Chip

•Hardware Reset

•Voltage Regulator On Chip

•Electrical Variable Resistance On Chip

•32-key scan function (8 x 4 Matrix)

•Oscillation circuit On Chip

•Voltage Converter (Doubler,Tripler) On Chip

•Bleeder Resistance On Chip

•Low Oprating Current

•Operating Voltage

- 2.4V to 3.6V (Except For LCD Driving Voltage)

•Package Outline

- Bumped-Chip / TCP

•C-MOS Technology

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