INTRODUCTION

The S6B0721 is a driver & controller LSI for graphic dot-matrix liquid crystal display systems. It contains 65 commons and 132 segments 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 132 bits. It provides a high-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 / 132 segment outputs

On-chip Display Data RAM

- Capacity: 65 x 132 = 8,580 bits

Applicable Duty Ratios

Microprocessor Interface

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

- Serial interface (only write operation) available

Function Set

- Various instructions sets

- H/W, S/W reset capable

Built-in Analog Circuit

- On-chip oscillator circuit

- Voltage converter (x2, x3, x4, x5)

- Voltage regulator (temperature coefficient: -0.05/°C, -0.2/°C)

- Voltage follower

- Electronic contrast control function (64 steps)

Operating Voltage Range

- Supply voltage (VDD): 2.4 to 3.6 V

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

Low Power Consumption

- 70 μA Typ. (VDD = 3V, x4 boosting, V0 = 11V, internal power supply ON)

- 10 μA Max. (during power save [standby] mode)

Package Type

- Gold bump chip or TCP