INTRODUCTION

ST7585 is a driver & controller LSI for graphic dot-matrix liquid crystal display systems. It contains 102-segment and 65-common with 1-icon-common driver circuits. This chip is connected directlyto a microprocessor which accepts 3-line or 4-line serial peripheral interface (SPI) or 8-bit parallel interface. Display data stores in an on-chip display data RAM (DDRAM) of 66 x 102 bits.

FEATURES

Single-chip LCD Controller & Driver

Driver Output Circuits

102-segment / 65-common+1-icon-common(1/66 duty)

On-chipDisplayDataRAM

- Capacity: 66X102= 6,732 bits

Microprocessor Interface

- 8-bit parallel bi-directional interface for 6800-series or 8080-series MPU

- 3-line & 4-line SPI (serial peripheral interface) are available(write only)

- Compatible with I2C interface

External RESB (reset) Pin

Built-in OscillationCircuit

- Oscillatorrequires no external component

Built-in OTP(One-TimeProgrammable) Function

LowPowerConsumption AnalogCircuit

- Voltage booster (X5)

- Voltageregulator generates LCD operating voltage(T emperature Gradient: -0.05/°C)

- Electronic contrast control (32 steps)

- Voltagefollower generates LCD bias voltages(1/7 and 1/9 bias)

WideSupply V oltageRange

- VDD1 –VSS1: 1.8V ~ 3.3V (covers 1.7V~3.4V)

- VDD2 –VSS2: 2.7V ~ 3.3V (covers 2.6V~3.4V)

RecommendDisplaySupply V oltage

- Vop: 8.5V ~ 9.5V (1/9 bias)

LCD ModuleSize: 1.4”(up to 1.8”)

T emperatureRange:-30°C ~ +85°C