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