ST
Sitronix
1. INTRODUCTION
ST7628
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
Driver Output Circuits
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294 Segment Outputs / 70 Common Outputs
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3-line (9-bits) serial interface
On-chip Low Power Analog Circuit
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On-chip Oscillator Circuit
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On-chip Voltage Converter (x2, x3, x4, x5, x6, x7, X8)
with internal booster capacitors.
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Extremely Few Outsider Components. (Required
outsider components: Three Capacitors)
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On-chip Voltage Regulator
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On-chip Electronic Contrast Control Function
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Voltage Follower (LCD bias: 1/5~1/12)
Applicable Duty Ratios
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Various Partial Display
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Partial Window Moving & Data Scrolling
Gray-Scale Display
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4FRC & 31 PWM function circuit to display 64
gray-scale display
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Support 8 color mode (Idle mode)
On-chip Display Data RAM
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Capacity: 98 x 70 x 16 =109,760 bits
Operating Voltage Range
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Supply Digital Voltage (VDD): 1.65 to 3.0V
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Supply Analog Voltage (VDD2, VDD3, VDD4, VDD5):
2.4 to 3.3V
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LCD Driving Voltage (VOP = V0 - VSS): Max to 18V
Color support by Interface
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256 color mode (via LUT)
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4K color mode (via LUT)
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65K color mode
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Truncated 262K color mode
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Truncated 16M color mode
LCD Driving Voltage (OTP)
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Contrast Adjustment Value is stored in the Built-In
OTP-ROM for better display quality.
Microprocessor Interface
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8/16-bit parallel bi-directional interface with 6800-series
or 8080-series
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4-line serial interface
LCD Driving setting suggestion
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LCD Driving Voltage (VOP = 11.72V), BIAS=1/8.
Package Type
♦
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
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
