INTRODUCTION

ST7575 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 directly to 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. It performs display data RAM read/write operation with no external operating clock to minimize power consumption. In addition, because it contains power supply circuits to drive liquid crystal, it is possible to make a display system with the fewest components.

FEATURES

Single-chip LCD Controller & Driver

Driver Output Circuits

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

On-chip Display Data Ram

- Capacity: 66X102= 6,732 bits Microprocessor Interface

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

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

External RESB (reset) pin

Built-in oscillation circuit

- Oscillator requires no external component

Low Power Consumption Analog Circuit

- Voltage booster (X4, X5)

- Voltage regulator generates LCD operating voltage

(Temperature Gradient: -0.11/°C)

- Electronic contrast control (128 steps)

- Voltage follower generates LCD bias voltages(1/4 ~ 1/11 bias)

Wide supply voltage range

- VDD1 – VSS1 : 1.8 ~ 3.3V

- VDD2 – VSS2 : 2.4 ~ 3.3V

Display supply voltage range

- Application Vop range : 8V ~ 9.5V

- Programmable voltage (Vop) : 10.56V (max)

Temperature range: -30 to +85 °C

Support LCD Module Size up to 1.8”