ST7556
65 x 102 Dot Matrix LCD Controller/Driver
Product Description
The ST7556 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 4-line serial
interface (SPI) or 8-bit parallel interface, display data can store 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 - Driver Output Circuits
- 102 segment outputs / 65+1 common outputs
- On-chip Display Data ram
- Capacity: 66X102=6,732 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)
- 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)
- Voltage regulator (temperature gradient -0.05%/¢XC)
- Voltage follower
- On-chip electronic contrast control function (128 steps)
- Liquid crystal driving voltage :
V0 -VSS = max 12 V (external power supply)
- External RESB (reset) pin
- Logic supply voltage range VDD -VSS
- 1.8 to 3.3V
- Temperature range: -30 to +85 degree
Downloads
| File |
Size |
Version |
Creation Date |
Specification | 409K | Ver.2.2 | 2005/10/26 | |
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