INTRODUCTION

The ST7532 is a driver & controller LSI for 65K color graphic dot-matrix liquid crystal display systems. It generates 256 Segment and 160 Common driver circuits. This chip is connected directly to a microprocessor, accepts Serial Peripheral Interface (SPI), 8-bit/16-bit parallel or IIC 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

?256 segment outputs / 160 common outputs

?Maximum resolution is 128(SPRD) x 160.

Applicable Duty Ratios

? Various partial display

? Partial window moving & data scrolling

Microprocessor Interface

? 8/16-bit parallel bi-directional interface with 6800-series or 8080-series

?4-line serial interface (write only)

?9 bit 3-line serial interface (write only)

On-chip Display Data RAM

? Capacity : 160 x 256 x 5bit = 204800bits (Max)

On-chip Low Power Analog Circuit

? On-chip oscillator circuit

? Voltage converter (x2, x3, x4, x5, x6, x7, x8)

? Voltage regulator

? Voltage follower (LCD bias: 1/5, 1/7, 1/9, 1/10, 1/11, 1/12, 1/13, 1/14)

Operating Voltage Range

? Supply voltage (VDD, VDD1, VDD2, VDD3, VDD4, VDD5): 2.4 to 3.3V

? LCD driving voltage (VLCD = V0 - VSS): 3.76 to 18.0 V

Temperature Gradient Coefficient

? -0.130/℃ +/-10

LCD driving voltage (EEPROM)

? To store contrast adjustment value for better display

Package Type

? Application for COG