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