ST
Sitronix
1. INTRODUCTION
ST7624
65K Color
Dot Matrix LCD Controller/Driver
The ST7624 is a driver & controller LSI for 65k color graphic dot-matrix liquid crystal display systems. It generates 312
Segment and 104 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
♦
312 segment outputs / 104 common outputs
On-chip Low Power Analog Circuit
♦
On-chip oscillator circuit
♦
Voltage converter (x2, x3, x4, x5, x6, x7, x8)
♦
Voltage regulator(Temperature gradient= -0.119%/
°C
Applicable Duty Ratios
♦
Various partial display
♦
Partial window moving & data scrolling
+-10%
)
♦
On-chip electronic contrast control function
♦
Voltage follower (LCD bias: 1/5 to 1/12)
Gray-Scale Display
♦
4FRC & 31 PWM function circuit to display
♦
64 gray-scale display.
Operating Voltage Range
♦
Supply voltage (VDD, VDD1): 2.4 to 3.3V
(VDD2, VDD3, VDD4, VDD5): 2.4 to
3.3V
♦
LCD driving voltage (VOP = V0 - VSS): 3.76 to 18.0 V
♦
Suggested value of V0 is 12V~15V , bias =1/11
On-chip Display Data RAM
♦
Capacity: 104X104X16 =173,056bits
♦
65K colors (RGB)=(565) mode
♦
Dithered262k colors (RGB)=(666) mode
♦
Dithered 16M colors (RGB)=(888) mode
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
ST7624
6800 , 8080 ,4-Line , 3-Line interface
Ver 1.8
1/98
2006/08/15
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
