INTRODUCTION

The S6B0755 is a driver & controller LSI for graphic dot-matrix liquid crystal display systems. It contains 65 common and 128 segment driver circuits. This chip is connected directly to a microprocessor, accepts serial or 8-bit parallel display data and stores in an on-chip display data RAM of 65 x 128 bits. It provides a highly flexible display section due to 1-to-1 correspondence between on-chip display data RAM bits and LCD panel pixels. And it performs display data RAM read/write operation with no externally 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 the fewest components.

FEATURES

Driver Output Circuits

- 65 common outputs / 128 segment outputs

Applicable Duty Ratios

- Various partial display

- Partial window moving & data scrolling

On-chip Display Data RAM

- Capacity: 65 x 128 = 8,320 bits

- Bit data 1: a dot of display is illuminated.

- Bit data 0: a dot of display is not illuminated.

Microprocessor Interface

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

- SPI (Serial Peripheral Interface) available. (only write operation)

On-chip Low Power Analog Circuit

- On-chip oscillator circuit

- Voltage converter (x3, x4 or x5)

- Voltage regulator (temperature coefficient: -0.05/°C or external input)

- On-chip electronic contrast control function (64 steps)

- Voltage follower (LCD bias: 1/4 to 1/9)

Operating Voltage Range

- Supply voltage (VDD): 1.8 to 3.3 V

- LCD driving voltage (VLCD = V0 - VSS): 4.0 to 15.0 V

Low power Consumption

- 120 mA Typ. (Internal power supply on and display OFF)

Package Type

- Gold bumped chip or TCP