ST7548T

ST Sitronix 1. INTRODUCTION 2 ST7548T 66 x 102 Dot Matrix LCD Controller/Driver The ST7548T is a driver & controller LSI for graphic dot-matrix liquid crystal display systems. It contains 102 segment and 65 common with 1 ICON driver circuits. This chip is connected directly to a microprocessor, accepts 8-bit parallel interface、3-line or 4-line serial peripheral interface (SPI)、I C interface, display data can stores in an on-chip display data RAM of 66 x 102 bits. 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 to drive liquid crystal, it is possible to make a display system with the fewest components. 2. FEATURES Single-chip LCD controller & driver Driver Output Circuits 102 segment / 65 common + 1 ICON On-chip Display Data ram Capacity: 66X102=6,732 bits Generation of intermediate LCD bias voltages Oscillator requires no external components (external clock also possible) Voltage converter (x4, x5) Voltage regulator(temperature gradient -0.11%/°C) Voltage follower On-chip electronic contrast control function (128 steps) External RESB (reset) pin Supply voltage range: VDD1 - VSS : 1.7 to 3.3V VDD2 - VSS : 2.4 to 3.3V VOUTIN - VSS : 13.5V (max) Microprocessor Interface 8-bit parallel bi-directional interface with 6800-series or 8080-series 4-line SPI (serial peripheral interface) available (only write operation) 3-line SPI (serial peripheral interface) a...