ST7548T
66 x 102 Dot Matrix LCD Controller/Driver
Product Description
The ST7548T is a driver & controller LSI for graphic dot-matrix liquid crystal display systems. It contains 102 segment
and 65 common with 1 ICOM driver circuits. This chip is connected directly to a microprocessor, accepts 8-bit parallel
interface,3-line or 4-line serial peripheral interface (SPI), I2C interface, display data can stores in an on-chip display
data RAM of 66 x 102 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 - 102 segment outputs / 68 common outputs
- On-chip Display Data ram
- Capacity: 68X102=6,936 bits
- Microprocessor Interface
- 8-bit parallel bi-directional interface with 6800-series or 8080-series
- 4-line SPI (serial peripheral interface) available (only write operation)
- 3-line SPI (serial peripheral interface) available
- 2-line Interface (Inter-Integrated Circuit) Interface
- i2C interface available (ST7548i)
- 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 (x4, x5)
- Voltage regulator
- Voltage follower
- On-chip electronic contrast control function (128 steps)
- External RESB (reset) pin
- Logic supply voltage range VDD1,2 -VSS
- 1.7 to 3.3V
- Display supply voltage range VLCD -VSS
- 4.5 to 13V
Temperature range: -40 to +85 degree
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