Products>LCD Driver for Mobile Phone>ST7687S
ST7687S
65K 128x128 Color Dot Matrix LCD Controller/Driver

Product Description

The ST7687S is a driver & controller LSI for 65K color graphic dot-matrix liquid crystal display systems. It generates 384 Segment and 128 Common driver circuits. This chip is connected directly to a microprocessor, accepts Serial Peripheral Interface (SPI) or 8-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
    - 384 segment outputs / 128 common outputs
  • Applicable Duty Ratios
    - Various partial display
    - Partial window moving & data scrolling
  • Gray-Scale Display
    - 4FRC & 31 PWM function circuit to display 64 gray-scale display
    - Support 8 color mode (Idle mode)
  • On-chip Display Data RAM
    - Capacity: 128 x 128 x 16 =262,144 bits
  • Color support by Interface
    - 4k colors (RGB)=(444) mode
    - 65K colors (RGB)=(565) mode
  • Microprocessor Interface
    - 8 bit parallel bi-directional interface with 6800-series or 8080-series
    - 4-line serial interface
    - 3-line (9-bits) serial interface
  • On-chip Low Power Analog Circuit
    - On-chip oscillator circuit
    - Voltage converter (x2~x8) with internal capacitors.
    - Extremely Few Outsider Components.
    - On-chip Voltage Regulator
    - On-chip electronic contrast control function
    - Voltage follower (LCD bias: 1/6~1/12)
  • Operating Voltage Range
    - Supply Digital Voltage (VDD): 1.65 to 3.3V
    - Supply Analog Voltage (VDD2~VDD5): 2.4 to 3.3V
    - LCD driving voltage (VOP = V0 - VSS): Max: 18V
  • LCD Driving Voltage
    - Contrast Adjustment Value is stored in the Built-In EEPROM for better display quality.
  • LCD Driving setting suggestion
    - VOP = 14V, BIAS=1/9. (VDD=2.8V)
  • Package Type
    - Application for COG

Downloads

File Size Version Creation Date
Specification2630KV 1.62010/02/05