INTRODUCTION

ST7588T is a driver & controller LSI for graphic dot-matrix liquid crystal display systems. It contains 132-segment, 80-common and 1-icon driver circuits. ST7588T can be connected directly to a microprocessor which accepts parallel interface (8-bit), serial peripheral interface (3-line or 4-line SPI), I2C interface. Display data stores in an on-chip display data RAM (DDRAM) of 81 x 132 bits. It performs display data RAM read/write operation without external operating clock to minimize the 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.

FEATURES

Single-chip LCD controller & driver

Driver Output Circuits

  Ø 132-segment / 81-common (1/81 duty)

  Ø Optional display duty 1/49, 1/65 and 1/81 (selected by MODE[1:0] pin)

  Ø Partial display mode: 1/33 duty and 1/17 duty

On-chip Display Data RAM

  Ø Capacity: 81X132=10,692 bits

Microprocessor Interface

  Ø 8-bit parallel bi-directional interface supports 6800-series or 8080-series MPU

  Ø 4-line A mode SPI (write only)

  Ø 4-line B mode SPI (write only)

  Ø 3-line 8-bit A mode SPI (write only)

  Ø 3-line 8-bit B mode SPI (write only)

  Ø 3 line 9-bit SPI (write only)

  Ø I2C (Inter-Integrated Circuit) Interface (write only)

On-chip Low Power Analog Circuit

  Ø Built-in Voltage Booster (x2, x3, x4, x5, x6)

  Ø Support external booster supply (VOUT)

  Ø Built-in Voltage Regulator With 255-step electronic contrast control(temperature gradient -0.12%/°C)

  Ø Built-in Voltage Follower (with 1/4 ~ 1/11 bias)

  Ø Supports external power supply circuits

External RESB (hardware reset) Pin

Built-in Oscillation Circuit

  Ø Oscillator requires no external components

Wide Voltage Range

  Ø VDD1: 1.8V to 3.3V (typ.)

  Ø VDD2: 2.4V to 3.3V (typ.)

  Ø Recommend LCD Vop: 9.5V ~ 10.5V (1/10 Bias, 1/81 Duty)

Temperature Range: -30 to +85 °C