ST7628

ST Sitronix 1. INTRODUCTION ST7628 65K Color Dot Matrix LCD Controller/Driver The ST7628 is a driver & controller LSI for 65K color graphic dot-matrix liquid crystal display systems. It generates 294 Segment and 70 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 ♦ 294 Segment Outputs / 70 Common Outputs ♦ 3-line (9-bits) serial interface On-chip Low Power Analog Circuit ♦ On-chip Oscillator Circuit ♦ On-chip Voltage Converter (x2, x3, x4, x5, x6, x7, X8) with internal booster capacitors. ♦ Extremely Few Outsider Components. (Required outsider components: Three Capacitors) ♦ On-chip Voltage Regulator ♦ On-chip Electronic Contrast Control Function ♦ Voltage Follower (LCD bias: 1/5~1/12) 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: 98 x 70 x 16 =109,760 bits Operating Voltage Range ♦ Supply Digital Voltage (VDD): 1.65 to...