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