INTRODUCTION

ST7571  is  a  driver  &  controller  LSI  for  4-level  gray  scale  graphic  dot-matrix  liquid  crystal  display  systems.  This  chip  is connected  directly  to  a  microprocessor ,  accepts  Serial  Peripheral  Interface  (SPI), I2C  or  8-bit  parallel  display  data  and stores in an on-chip display data RAM of 128 x 129 x 2 bits.

FEATURES

4-level (White, Light Gray , Dark Gray , Black) GrayScaleDisplay withPWM Method

Driver Output Circuits

-  128 segment outputs/ 128+1 common outputs

ApplicableDutyRatios

-  V ariouspartial display

-  Partial window moving& data scrolling

On-chipDisplayDataRAM

-  Capacity: 128 x 129 x 2= 33,024 bits

Microprocessor Interface

-  8-bitparallel interface supports

6800-series or 8080-series MCU

-  4-line serial interface(4-Line SPI)

-  3-line serial interface(3-Line 8-bit SPI)

-  I2C serial interface

On-chip LowPower  Analog Circuits

-  On-chip oscillator circuit

-  Build-in Voltage converter ( x8)

-  Voltageregulator (temperature gradient: -0.13%/°C)

-  On-chip contrast controlfunction(64 steps x 8)

-  Voltagefollower (LCD bias : 1/5to 1/12)

Operating V oltageRange

-  DigitalPower (VDD1): 1.8V~3.3V (cover 1.7V~3.4V)

-  AnalogPower (VDD2, VDD3): 2.7V~3.3V (cover 2.6V~3.4V)

Package Type

-  Application for COG