ST
Sitronix
ST7773
262K Color Single-Chip TFT Controller/Driver
1. Introduction
ST7773 is a single-chip controller/driver for 262K-color, graphic type TFT-LCD. It consists of 528 source line and 220 gate
line driver circuits. This chip can be connected to a microprocessor direct through Serial Peripheral Interface (SPI) or
8-bits/9-bits/16-bits/18-bits parallel interface. The display data is stored in the on-chip Display Data RAM (DDRAM) of
176x220x18 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
Built-in Circuits
On-chip Display Data RAM (i.e. Frame Memory)
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DC/DC converter
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176 x 220 x 18 = 696,960 bits
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Adjustable VCOM
LCD Driver Output Circuits:
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4 preset gamma curves (1.0, 1.8, 2.2 & 2.5)
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Source Outputs: 176 RGB channels
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Oscillator for display clock generation
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Gate Outputs: 220 channels
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Timing controller
Display Resolution
Built-in NV Memory for LCD Initial Register Setting
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7-bits for ID2
Display Colors (Color Mode)
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7-bits for VCOM adjustment
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Full Color: 262K, RGB=(666) max., Idle Mode OFF
Wide Supply Voltage Range
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176 (RGB) x 220
Color Reduce: 8-color, RGB=(111), Idle Mode ON
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I/O Voltage (VDDI to DGND): 1.6V~3.3V
Programmable Pixel Color Format (Color Depth) for
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Analog Voltage (VDD to AGND): 2.7V~3.3V
Various Display Data input Format
On-Chip Power System
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12-bit/pixel: RGB=(444) using whole frame memory
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Source Voltage (GVDD to AGND): 3.0V~5.0V
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16-bit/pixel: RGB=(565) using whole frame memory
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VCOM HIGH level (VCOMH to AGND): 2.5V to 5.0V
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18-bit/pixel: RGB=(666) using whole frame memory
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VCOM LOW level (VCOML to AGND): -2.5V to 0.0V
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Gate driver HIGH level (VGH to AGND):
Various Interfaces
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Parallel 8080-series MCU Interface
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3-line serial interface
+10.0V to 16V
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(8-bit, 9-bit, 16-bit & 18-bit)
Gate driver LOW level (VGL to AGND):
-13V to -5.5V
Display Features
Operating Temperature: -30° to +85°
C
C
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Programmable partial display duty
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Line inversion, frame inversion
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Supporting MVA type LC
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Support both normal-black & normal-white LC
ST7773
8080 MCU Interface: 8-bit/9-bit/16-bit/18-bit
Serial Peripheral Interface : 3-line
Sitronix Technology Corp. reserves the right to change the contents in this document without prior notice
Ver. 2.0
1
2008-7-7
