INTRODUCTION
The ST7626 is a driver & controller LSI for 65K color graphic dot-matrix liquid crystal display systems. It generates 294 Segment and 68 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
    ♦ 294 Segment Outputs / 68 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.
On-chip Display Data RAM
    ♦ Capacity: 98 x 68 x 16 =106,624 bits
    ♦ 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 (4-line-SIF)
    ♦ 3-line serial interface (3-line-SIF)
On-chip Low Power Analog Circuit
    ♦ On-chip Oscillator Circuit
    ♦ On-chip Voltage Converter (x2, x3, x4, x5) with internal booster capacitors.
    ♦ Extremely Few Outsider Compoment. (Minimum required outsider compoments: One Capacitor).
    ♦ On-chip Voltage Regulator (Temperature gradient = -0.065%/°C)
    ♦ On-chip Electronic Contrast Control Function (406 steps)
    ♦ Voltage Follower (LCD bias: 1/5 to 1/12)
Operating Voltage Range
    ♦ Supply Digital Voltage (VDD, VDD1): 1.8 to 3.3V
    ♦ Supply Analog Voltage (VDD2, VDD3, VDD4, VDD5): 2.4 to 3.3V
    ♦ LCD Driving Voltage (VOP = V0 - VSS): 3.76V to 18V
    ♦ The suggested value of V0 is under 11 V with bias =1/9.
LCD Driving Voltage (EEPROM)
    ♦ Contrast Adjustment Value is stored in the Built-In EEPROM for better display quility.
LCM Performance Adjustment (EEPROM)
    ♦ Adjustment Value for best Display Performance is stored in the Built-In EEPROM.
Package Type
    ♦ Application for COG