Introduction
The ST7781 is a single-chip controller/driver for 262K-color, graphic type TFT-LCD. It consists of 720 source line and 320 gate line driving circuits. This chip is capable of connecting directly to an external microprocessor, and accepts, 8-bits/9-bits/16-bits/18-bits parallel interface. Display data can be stored in the on-chip display data RAM of 240x320x18 bits. It can perform display data RAM read/write operation with no external operation clock to minimize power consumption. In addition, because of the integrated power supply circuit necessary to drive liquid crystal; it is possible to make a display system with the fewest components.

FEATUREs
◆ Driver Output:
- 720ch Source Outputs (240 X RGB)
- 320ch Gate Outputs
- Common Electrode Output
◆ Single Chip Display RAM:
-Capacity: 240x320x18 bit
◆ Support Display Color
- 65K Color
- 262K Color
- 8-color (Idle Mode)
◆ Supported LC Type Option
- MVA LC Type
- Transflective LC Type
- Transmissive LC Type
◆ Supported MCU Interface
- 8/9/16/18-bit Interface with 8080-Series MCU
- 3-line serial interface
◆ Display Features
- Partial Display Mode
- Resizing Function (x1/2, x1/4)
◆ Build-in Circuit
- DC/DC Converter
- Adjustable VCOM Generation
- Oscillator for Display Clock Generation
- Timing Controller
- Non-volatile Memory for Factory Default Value
- Line Inversion, Frame Inversion
◆ Non-Volatile Memory
- 7-bits for ID Code
- 5-bits for VCOM Adjustment
◆ Supply Voltage Range
- Analog Supply Voltage (VDD) Range: 2.5V to 3.3V
- I/O Supply Voltage (VDDI) Range: 1.65V to 3.3V
◆ Output Voltage Level
- GVDD – AGND: 3V to (AVDD-0.5) V
- AVDD – AGND: 4.5V to 5.6V
- VCL – AGND: -2.0V to -3.0V
- VCOMH – AGND: 3.0V to (AVDD-0.5) V
- VCOML – AGND: (VCL+0.5) V to 0.0V
- VGH – AGND: 10V to 16.5V
- VGL – AGND: -5V to -14V
◆ Lower Power Consumption
- CMOS Compatible Inputs
- Optimized Layout for COG Assembly
- Operate Temperature Range: -30 ℃ ~ +85℃