ST
ST7781
262K Color Single –Chip TFT Controller/Driver
1. 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 circu its necessary to drive liquid crystal, it is possible to
make a display system with the fewest components.
2. 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
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℃
ST7781
8080 Parallel Interface :8bit/ 9 bit/16 bit /18bit
Sitronix Technology Corp. reserves the right to change the contents in this document without prior notice.
