INTRODUCTION

The ST7632 is a driver & controller LSI for 4K color graphic dot-matrix liquid crystal display systems. It generates 396 Segment and 132 Common driver circuits. This chip is connected directly to a microprocessor, accepts Serial Peripheral Interface (SPI) or 8-bit/16-bit parallel display data and stores in an on-chip display data RAM. 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 the fewest components.

FEATURES

Driver Output Circuits

-396 segment outputs / 132 common outputs

Applicable Duty Ratios

- Various partial display

- Partial window moving & data scrolling

On-chip Display Data RAM

- Capacity: 396 x 132 x 4 =209,088 bits

- 256colors (RGB)=(332) mode

-4K colors (RGB)=(444) mode

-Dithered 65K colors (RGB)=(565) mode

-Dithered 262K colors (RGB)=(666) mode

-Dithered 16M colors (RGB)=(888) mode

Microprocessor Interface

- 8/16-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)

On-chip Low Power Analog Circuit

- On-chip oscillator circuit

- Voltage converter (x2, x3, x4, x5, x6, x7, x8)

- Voltage regulator

- On-chip electronic contrast control function

- Voltage follower (LCD bias: 1/5 to 1/12)

Operating Voltage Range

- Supply voltage (VDD, VDD1): 2.0 to 3.3V (VDD2, VDD3, VDD4, VDD5): 2.6 to 3.3V V3 & V4 must large than VDD5

- LCD driving voltage (VLCD = V0 - VSS): 3.76 to 18.0 V

- Suggest Vop range=12V~14V,LCD bias=1/12.

LCD driving voltage (EEPROM)

- To store contrast adjustment value for better display

Package Type

- Application for COG