Description

The ST7687A-G4-1 is a driver and controller LSI for 65K color graphic dot-matrix liquid crystal display systems. It belongs to the IC Chips category and has the capability to generate 384 segments and 160 commons driver circuits. This chip is connected directly to a microprocessor and accepts Serial Peripheral Interface or 8-bit/16-bit parallel display data and stores it in an on-chip display data RAM. Additionally, it has power supply circuits necessary for driving the liquid crystal, allowing for a display system to be made with fewer components.

Specifications and Features

• Driver Output Circuits: 384 segment outputs / 160 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 160 x 16 = 327,680 bits
• Color Support by Interface: 256 color mode(RGB)=(332) mode, 4k colors (RGB)=(444) mode, 65K colors (RGB)=(565) mode, 262K colors (RGB)=(666) mode (truncate)
• Microprocessor Interface: 8/16-bit parallel bi-directional interface with 6800-series or 8080-series, 3-line (9-bits), 4-line(8-bits) serial interface
• On-chip Low Power Analog Circuit: On-chip oscillator circuit and voltage regulator, voltage converter (x5, x6, x7, x8) with internal booster capacitors, extremely few outsider components (4 Capacitors)
• On-chip electronic contrast control function, voltage follower (LCD bias: 1/9, 1/10, 1/11, 1/12, 1/13, 1/14)
• Operating Voltage Range: Supply Digital Voltage -> VDDI (VDD) = 1.65~3.3V, Supply Analog Voltage -> VDDA (VDD1, VDD2, VDD3, VDD4, VDD5) = 2.4~3.3V, LCD driving voltage (VOP = V0 - VSS): Max - 18V
• LCD Driving Voltage (PROM): Contrast Adjustment Value is stored in the built-in PROM (Programmable ROM) for better display quality
• LCD Driving Setting Suggestion: Vop=15~16V, Bias=1/9~1/11
• Package Type: Application for COG (Chip-On-Glass)

Application Scenarios

The ST7687A-G4-1 model is applicable in various applications such as digital cameras, mobile phones, portable media players, and many more devices that require graphics and a user interface.

Comparison

• Generates 384 segments and 160 commons driver circuits
• It has an on-chip display data RAM and power supply circuits, allowing for fewer components to be used
• Supports various partial displays, partial window movements & data scrolling
• Has on-chip electronic contrast control function and voltage follower

• None found