ST
Sitronix
ST7715
262K Color Single-Chip TFT Controller/Driver
1
Introduction
The ST7715 is a single-chip controller/driver for 262K-color, graphic type TFT-LCD. It consists of 396 source line and 132
gate line driving circuits. This chip is capable of connecting directly to an external microprocessor, and accepts Serial
Peripheral Interface (SPI), 8-bit/9-bit/16-bit/18-bit parallel interface. Display data can be stored in the on-chip display data
RAM of 132 x 132 x 18 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 circuits necessary to drive liquid crystal,
it is possible to make a display system with fewer components.
2
Features
Single chip TFT-LCD Controller/Driver with RAM
On-chip Display Data RAM (i.e. Frame Memory)
- 132 (H) x RGB x 132 (V) bits
LCD Driver Output Circuits:
- Source Outputs: 132 RGB channels
Built-in Circuits
- DC/DC converter
-
Non-volatile (NV) memory to store initial register setting
-
Oscillator for display clock generation
-
- Gate Outputs: 132 channels
Display Resolution
- 132 (RGB) x 132
Adjustable VCOM
Factory default value (module ID, module version, etc)
are stored in NV memory
(GM[2:0]= ”001”, DDRAM: 132 x 18-bits x 132)
Display Colors (Color Mode)
- Full Color: 262K, RGB=(666) max., Idle Mode OFF
- Timing controller
Built-in NV Memory for LCD Initial Register Setting
- 7-bits for ID2
- Color Reduce: 8-color, RGB=(111), Idle Mode ON
Programmable Pixel Color Format (Color Depth) for
Various Display Data input Format
- 12-bit/pixel: RGB=(444) using the 384k-bit frame
-
- 7-bits for VCOM adjustment
Wide Supply Voltage Range
- I/O Voltage (VDDI to DGND): 1.65V~VDD
memory and LUT
-
(VDDI ≤ VDD)
16-bit/pixel: RGB=(565) using the 384k-bit frame
- Analog Voltage (VDD to AGND): 2.6V~3.3V
On-Chip Power System
- Source Voltage (GVDD to AGND): 3.0V~5.0V
memory and LUT
-
18-bit/pixel: RGB=(666) using the 384k-bit frame
-
VCOM HIGH level (VCOMH to AGND): 2.5V to 5.0V
-
VCOM LOW level (VCOML to AGND): -2.4V to 0.0V
-
Gate driver HIGH level (VGH to AGND):
-
memory and LUT
Various Interfaces
- Parallel 8080-series MCU Interface
Gate driver LOW level (VGL to AGND):
(8-bit, 9-bit, 16-bit & 18-bit)
-
8-bits for ID3
+10.0V to 15V
3-line serial interface
- 4-line serial interface
Display Features
- Programmable partial display duty
-
Line inversion, frame inversion
-
Support both normal-black & normal-white LC
-
-12.4V to –7.5V
Operating Temperature: -30° to +85°
C
C
Software programmable color depth mode
ST7715
Parallel Interface: 8-bit/9-bit/16-bit/18-bit
Serial Interface: 3-line/4-line
Sitronix Technology Corp. reserves the right to change the contents in this document without prior notice.
V1.1
1
2009-1-5
