ST7636

ST Sitronix 1. INTRODUCTION ST7636 65K Color Dot Matrix LCD Controller/Driver The ST7636 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 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 (406 steps) ♦ Voltage follower (LCD bias: 1/5 to 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. Operating Voltage Range ♦ Supply voltage (VDD, VDD1): 2.4 to 3.3V (VDD2, VDD3, VDD4, VDD5): 2.4 to 3.3V ♦ LCD driving voltage (VOP = V0 - VSS): 3.76 to 18.0 V ♦ the suggested value of V0 is 12~15 V under bias =1/11. On-chip Display Data RAM ♦ Capacity: 132 · 132 · 16 =278,784bits ♦ 65K colors (RGB)=(565) mode ♦ D...