INTRODUCTION

The ST7669 is a driver & controller LSI for 262K color graphic dot-matrix liquid crystal display systems. It generates 396 Segment and 162 Common driver circuits. This chip is connected directly to a microprocessor, accepts Serial Peripheral Interface (SPI) or 8-bit/16-bit/18-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 / 162 common outputs

Applicable Duty Ratios

♦ Various partial display

♦ Partial window moving & data scrolling

Gray-Scale Display

♦ 4FRC & 31 PWM function circuit to display 64 gray-scale display

♦ Support 8 color mode (Idle mode)

On-chip Display Data RAM

♦ Capacity: 132 x 162 x 18 =384,912 bits

Color support by Inteface

♦ 256 color mode(RGB)=(332) mode (via LUT)

♦ 4K colors (RGB)=(444) mode (via LUT)

♦ 65K colors (RGB)=(565) mode

♦ 262K colors (RGB)=(666) mode

♦ Truncated 16M colors (RGB)=(888) mode

Microprocessor Interface

♦ 8/16/18-bit parallel bi-directional interface with 6800-series or 8080-series

♦ 3-line (9-bits) or 4-line( 8-bit) serial interface

On-chip Low Power Analog Circuit

♦ On-chip oscillator circuit

♦ Voltage converter (x1, x2, x3, x4, x5, x6, x7, x8) with internal booster capacitors.

♦ Extremely Few Outsider Compoment. (Required outsider components: Three Capacitors)

♦ On-chip Voltage Regulator

♦ On-chip electronic contrast control function

♦ Voltage follower(LCD bias: 1/5,1/7,1/9,1/10,/11,1/12, 1/13, 1/14)

Operating Voltage Range

♦ Supply Digital Voltage (VDD): 1.65 to 3.0V

♦ Supply Analog Voltage (VDD2, VDD3, VDD4, VDD5): 2.4 to 3.3V

♦ LCD driving voltage (VOP = V0 - VSS): Max: 18V

LCD Driving Voltage (OTP)

♦ Contrast Adjustment Value is stored in the Built-In OTP-ROM for better display quility.

LCD Driving setting suggestion

♦ Vop=16.52, Bias=1/10

Package Type

♦ Application for COG