ST7568
68C x 102S 4-Grey Scale Dot Matrix LCD Controller/Driver
Product Description
The ST7568 is a driver & controller LSI for 4-level gray scale graphic dot-matrix liquid crystal display systems. It contains 102 segment and 68 common driver circuits. This chip is connected directly to a microprocessor, accepts 4-line serial interface(SPI) ĦB2-line serial interface or 8-bit parallel interface, display data can stores in an on-chip display data RAM of 68 x 102 x 2 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 to drive liquid crystal, it is possible to make a display system with the fewest components.
Features - Driver Output Circuits 102 segment outputs / 68 common outputs
- On-chip Display Data ram
- Capacity: 68X102X2=13,872 bits
- Bit data " 11 ": a dot of display is illuminated in dark mode.
- Bit data " 10 ": a dot of display is not illuminated in dark gray mode.
- Bit data " 01 ": a dot of display is not illuminated in light gray mode.
- Bit data " 00 ": a dot of display is not illuminated in white mode.
- Microprocessor Interface
- 8-bit parallel bi-directional interface with 6800-series or 8080-series
- 4-line SPI (serial peripheral interface) available (only write operation)
- 2-line Interface (Inter-Integrated Circuit) Interface
-- i2C interface available (ST7568i)
- On-chip Low Power Analog Circuit
- Generation of LCD supply voltage (externally Vout voltage supply is possible)
- Generation of intermediate LCD bias voltages
- Oscillator requires no external components (external clock also possible)
- Voltage converter (x2, x3, x4, x5)
- Voltage regulator
- Voltage follower
- On-chip electronic contrast control function (128 steps)
- External RESB (reset) pin
- Logic supply voltage range VDD -VSS
- 1.7 to 3.3V
- Temperature range: -40 to +85 degree
- Gold bumped chip available
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