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