Product Description
The ST7528 is a driver & controller LSI for 16-level gray scale graphic dot-matrix liquid crystal display systems. It contains 3 Mode for Segment and Common driver circuits. This chip is connected directly to a microprocessor, accepts Serial Peripheral Interface (SPI) or 8-bit parallel display data and stores in an on-chip display data RAM of 160 x 129 x 4 bits. 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
- 16-level (White Mode ~ Dark Mode) Gray Scale Display with PWM and FRC Methods
- 4-level (White, Light Gray, Dark Gray, Dark) Gray Scale Display with PWM and FRC Methods
- Driver Output Circuits
- MODE 0,1: 128 segment outputs / 128+1 common outputs (4-level gray scale)
- MODE 2: 132 segment outputs / 128+1 common outputs (16-level gray scale)
- MODE 3: 160 segment outputs / 100+1 common outputs (16-level gray scale)
- Applicable Duty Ratios
- Various partial display
- Partial window moving & data scrolling
- On-chip Display Data RAM
- Capacity: 101 160 4 = 64,640 bits
Gray Level or 4-Gray Level display dot is illuminated by 4 bit data control
- Microprocessor Interface
- 8-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)
- 2-line serial interface (2-line-SIF)
- On-chip Low Power Analog Circuit
- On-chip oscillator circuit
- Voltage converter (x3, x4, 5 or x6)
- Voltage regulator (temperature coefficient: -0.125%/ C, or external input)
- On-chip electronic contrast control function (64 steps)
- Voltage follower (LCD bias : 1/5 to 1/12)
- Operating Voltage Range
- Supply voltage (VDD): 1.8 to 3.3V
- LCD driving voltage (VLCD = V0 - VSS): 4.0 to 15.0 V
- Package Type
- Slim chip for TCP or gold-bumped chip (I2C Bus Available(ST7528i)
