INTRODUCTION The ST7632 is a driver & controller LSI for 4K 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. FEATURES Driver Output Circuits -396 segment outputs / 132 common outputs Applicable Duty Ratios - Various partial display - Partial window moving & data scrolling On-chip Display Data RAM - Capacity: 396 x 132 x 4 =209,088 bits - 256colors (RGB)=(332) mode -4K colors (RGB)=(444) mode -Dithered 65K colors (RGB)=(565) mode -Dithered 262K colors (RGB)=(666) mode -Dithered 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 - Voltage converter (x2, x3, x4, x5, x6, x7, x8) - Voltage regulator - On-chip electronic contrast control function - Voltage follower (LCD bias: 1/5 to 1/12) Operating Voltage Range - Supply voltage (VDD, VDD1): 2.0 to 3.3V (VDD2, VDD3, VDD4, VDD5): 2.6 to 3.3V V3 & V4 must large than VDD5 - LCD driving voltage (VLCD = V0 - VSS): 3.76 to 18.0 V - Suggest Vop range=12V~14V,LCD bias=1/12. LCD driving voltage (EEPROM) - To store contrast adjustment value for better display Package Type - Application for COG
|