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ST7541 Datenblatt(PDF) 1 Page - Sitronix Technology Co., Ltd. |
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ST7541 Datenblatt(HTML) 1 Page - Sitronix Technology Co., Ltd. |
1 / 78 page ST Sitronix ST7541 4 Gray Scale Dot Matrix LCD Controller/Driver Ver 1.9 1/78 2007/9/3 INTRODUCTION ST7541 is a driver & controller LSI for 4-level gray scale graphic dot-matrix liquid crystal display systems. This chip can connect directly to a microprocessor which supports: Serial Peripheral Interface (SPI), IIC or 8-bit parallel interface. Display data stores in an on-chip display data RAM of 128 x 129 x 2 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 necessary to drive liquid crystal, it is possible to make a display system with the fewest components. FEATURES 4-level Gray Scale – Display with PWM and FRC Methods DDRAM Data [2n:2n+1] 2n 2n + 1 Gray Scale 0 0 White 0 1 Light gray 1 0 Dark gray 1 1 Black (Accessible column address, n = 0~127) Driver Output Circuits 128 segment outputs / 128+1 common outputs Applicable Duty Ratios – Various partial display – Partial window moving & data scrolling On-chip Display Data RAM – Capacity: 128 × 129 × 2= 33,024 bits Microprocessor Interface – 8-bit bi-directional parallel interface supports 6800-series or 8080-series MPU – 4-line serial interface (4-Line SPI) – 3-line serial interface (3-Line 8-bit SPI) – IIC serial interface On-chip Low Power Analog Circuit – On-chip oscillator circuit – Voltage booster (x3, x4, x5 or x6) – Voltage regulator (temperature coefficient: -0.144%/˚C, or external input) – On-chip electronic contrast control function (64 steps X 8) – Voltage follower (LCD bias : 1/5 to 1/12) Operating Voltage Range – Supply voltage (VDD): 1.8 to 3.3V – Supply voltage (VDD2): 2.4 to 3.3V – LCD driving voltage (VLCD = V0 - VSS): 3.5 to 15.0 V Package Type – Application for COG ST7541 6800 , 8080 , 4-Line , 3-Line interface (without IIC interface) ST7541i IIC interface Sitronix Technology Corp. reserves the right to change the contents in this document without prior notice. |
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