ST7687A
128RGB x 128 dot 65K Color with Frame Memory Single-Chip CSTN Controller/Driver
Product Description
The ST7687A is a driver & controller LSI for 65K color graphic dot-matrix liquid crystal display systems. It
generates 384 Segment and 128 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
- 384 segment outputs / 128 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: 128 x 128 x 16 =262,144 bits
- Color Support By Interface
- 4k colors (RGB)=(444) mode
- 65K colors (RGB)=(565) 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
- Voltage converter (x5~x8) with internal capacitors.
- Extremely Few Outsider Components.
- On-chip Voltage Regulator
- On-chip electronic contrast control function
- Voltage follower (LCD bias: 1/7~1/12)
- Operating Voltage Range
- Supply Digital Voltage VDDI(VDD): 1.65 to 3.3V
- Supply Analog Voltage VDDA(VDD2, VDD3, VDD4, VDD5): 2.4 to 3.3V
- LCD driving voltage (VOP = V0 - VSS): Max: 18V
- LCD Driving Voltage
- Contrast Adjustment Value is stored in the Built-In PROM (Programable ROM) for better display quality.
- LCD Driving Setting Suggestion
- VOP = 14V, BIAS=1/9. (VDD=2.8V)
- Package Type
- Application for COG
Downloads
| File |
Size |
Version |
Creation Date |
Specification | 2607K | V 1.2 | 2010/04/15 | |
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