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ST7628 Datasheet, PDF (1/213 Pages) Sitronix Technology Co., Ltd. – 65K Color Dot Matrix LCD Controller/Driver
ST
Sitronix
ST7628
1. INTRODUCTION
65K Color Dot Matrix LCD Controller/Driver
The ST7628 is a driver & controller LSI for 65K color graphic dot-matrix liquid crystal display systems. It generates 294
Segment and 70 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
♦ 3-line (9-bits) serial interface
Driver Output Circuits
On-chip Low Power Analog Circuit
♦ 294 Segment Outputs / 70 Common Outputs
♦ On-chip Oscillator Circuit
Applicable Duty Ratios
♦ On-chip Voltage Converter (x2, x3, x4, x5, x6, x7, X8)
♦ Various Partial Display
with internal booster capacitors.
♦ Partial Window Moving & Data Scrolling
♦ Extremely Few Outsider Components. (Required
Gray-Scale Display
outsider components: Three Capacitors)
♦ 4FRC & 31 PWM function circuit to display 64
♦ On-chip Voltage Regulator
gray-scale display
♦ On-chip Electronic Contrast Control Function
♦ Support 8 color mode (Idle mode)
♦ Voltage Follower (LCD bias: 1/5~1/12)
On-chip Display Data RAM
Operating Voltage Range
♦ Capacity: 98 x 70 x 16 =109,760 bits
♦ Supply Digital Voltage (VDD): 1.65 to 3.0V
Color support by Interface
♦ Supply Analog Voltage (VDD2, VDD3, VDD4, VDD5):
♦ 256 color mode (via LUT)
2.4 to 3.3V
♦ 4K color mode (via LUT)
♦ LCD Driving Voltage (VOP = V0 - VSS): Max to 18V
♦ 65K color mode
LCD Driving Voltage (OTP)
♦ Truncated 262K color mode
♦ Contrast Adjustment Value is stored in the Built-In
♦ Truncated 16M color mode
OTP-ROM for better display quality.
Microprocessor Interface
LCD Driving setting suggestion
♦ 8/16-bit parallel bi-directional interface with 6800-series ♦ LCD Driving Voltage (VOP = 11.72V), BIAS=1/8.
or 8080-series
Package Type
♦ 4-line serial interface
♦ Application for COG
ST7628 6800 , 8080 ,4-Line , 3-Line interface
Sitronix Technology Corp. reserves the right to change the contents in this document without prior notice.
Ver 1.4
1/213
2008/08