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”