ST
Sitronix
1. INTRODUCTION
ST7632
4K Color
Dot Matrix LCD Controller/Driver
The ST7632 is a driver & controller LSI for 4K color graphic dot-matrix liquid crystal display systems. It generates 396
Segment and 132 Common driver circuits. This chip is connected directly to a microprocessor, accepts Serial Peripheral
Interface (SPI) or
8-bit/16-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.
2. FEATURES
Driver Output Circuits
−396
segment outputs / 132 common outputs
On-chip Low Power Analog Circuit
−
On-chip oscillator circuit
−
Voltage converter (x2, x3, x4, x5, x6, x7, x8)
−
Voltage regulator
−
On-chip electronic contrast control function
−
Voltage follower (LCD bias: 1/5 to 1/12)
Applicable Duty Ratios
−
Various partial display
−
Partial window moving & data scrolling
On-chip Display Data RAM
−
Capacity: 396
×
132
×
4 =209,088 bits
−
256 colors (RGB)=(332) mode
−4K
colors (RGB)=(444) mode
−Dithered
65K colors (RGB)=(565) mode
−Dithered
262K colors (RGB)=(666) mode
−Dithered
16M colors (RGB)=(888) mode
Operating Voltage Range
−
Supply voltage (VDD, VDD1): 2.0 to 3.3V
(VDD2, VDD3, VDD4, VDD5): 2.6 to
3.3V
V3 & V4 must large than VDD5
−
LCD driving voltage (VLCD = V0 - VSS): 3.76 to 18.0 V
−
Suggest Vop range=12V~14V,LCD bias=1/12.
Microprocessor Interface
−
8/16-bit parallel bi-directional interface with 6800-series
or 8080-series
−
4-line serial interface (4-line-SIF)
−
3-line serial interface (3-line-SIF)
LCD driving voltage (EEPROM)
−
To store contrast adjustment value for better display
Package Type
−
Application for COG
Par no.
ST7632
Equipment
Type
Internal
Power
Supply
Thermal Gradient
-0.125( +-10% )%/℃
ST7632
6800 , 8080 ,4-Line , 3-Line interface
Ver 1.7
1/96
2006/08/15
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
