ST7637

65K 132x132 Color Dot Matrix LCD Controller/Driver

1\. INTRODUCTION

The is a driver & controller LSI for 65K 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.

2\. FEATURES

Driver Output Circuits

♦ 396 segment outputs / 132 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 132 x 16 =278,784 bits

Color support by Interface

♦ 256 colors RGB=332 mode

♦ 4k colors RGB=444 mode

♦ 65K colors RGB=565 mode

♦ Truncated 262K colors RGB=666 mode

♦ Truncated 16M colors RGB=888 mode

Microprocessor Interface

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

♦ 4-line serial interface

♦ 3-line 9-bits serial interface

On-chip Low Power Analog Circuit

♦ On-chip oscillator circuit

♦ Voltage converter x2~x8 with internal capacitors.

♦ Extremely Few Outsider Components. 3 Capacitors

♦ On-chip Voltage Regulator

♦ On-chip electronic contrast control function

♦ Voltage follower LCD bias: 1/5~1/12 Operating Voltage Range

♦ Supply Digital Voltage VDD, VDD1: 1.65 to 3.0V

♦ Supply Analog Voltage VDD2~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 quality. LCD Driving setting suggestion

♦ VOP = 14V, BIAS=1/9. VDD=2.8V

♦ VOP=15.5V,BIAS=1/10. VDD=2.8V

Package Type

♦ Application for COG