INTRODUCTION

The ST7528 is a driver & controller LSI for 16-level gray scale graphic dot-matrix liquid crystal display systems. It contains 2 Mode(160X100,132X128) for Segment andCommon driver circuits. This chip is connected directlyto a microprocessor, accepts Serial Peripheral Interface (SPI), IIC or 8-bitparalleldisplay data and stores in an on-chip display data RAM of 160 x 129 x 4 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 necessary to drive liquid crystal, it is possible to make a display system with thefewest components.

FEATURES

16-level (White Mode ~Dark Mode) Gray Scale Display with PWMand FRC Methods

Driver OutputCircuits

-Mode 0: 132 segment outputs/ 128+1 common outputs(16-level gray scale)

-Mode 1: 160 segment outputs/ 100+1 common outputs(16-level gray scale)

ApplicableDisplay Ratios

- Various partial display

- Partial window moving& data scrolling

On-chipDisplay Data RAM

- Capacity: 129 ´ 160 ´ 4 = 82,560 bits

- 16-Gray Level display dot is illuminated by 4 bit data control

Microprocessor Interface

- 8-bit parallel bi-directional interface with 6800-series or 8080-series

- 4-line serial interface (4-line-SIF)

- 3-line serial interface (3-line-SIF)

- IIC serial interface

On-chip Low Power AnalogCircuit

- On-chip oscillator circuit

- Voltage converter (x3, x4, x5 or x6)

- Voltageregulator (temperature coefficient: -0.125/°C, or external input)

- On-chip electronic contrast controlfunction(64 steps X 8)

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

Operating Voltage Range

- Supply voltage(VDD): 1.8 to 3.3V (VDD2): 2.4 to 3.3V

- LCD driving voltage(VLCD =V0- VSS): 3.5 to 15.0V Package Type

- Application for COG