SSD1820A/21 is a single-chip CMOS LCD driver with controller for a liquid crystal dot-matrix graphic display system. SSD1820A consists of 194 high voltage driving output pins for driving 128 Segments, 64 Commons and 2 icon driving Commons, while SSD1821 consists of 210 high voltage driving output pins for driving 128 Segments, 80 Commons and 2 icon driving Commons.
SSD1820A/21 displays data directly from its internal 128x65/128X81 bits Graphic Display Data RAM (GDDRAM). Data/Commands are sent from general MCU through a hardware selectable 6800-/8080-series compatible Parallel Interface or 3/4 wires Serial Peripheral Interface.
SSD1820A/21 embeds a DC-DC Converter, a LCD Voltage Regulator, an OnChip Bias Divider and an On-Chip Oscillator which reduce the number of external components. With the special design on minimizing power consumption and die/package layout, SSD1820A/21 is suitable for any portable battery-driven applications requiring a long operation period and a compact size.

• 128 x 64/80 Graphic Display with a Icon Line
• Programmable Multiplex ratio [16Mux - 65Mux/81Mux] (Partial Display)
• Single Supply Operation, 1.8 V - 3.3V
• Low Current Sleep Mode(<1.0uA)
• On-Chip Voltage Generator / External Power Supply
• Software selectable 2X / 3X / 4X / 5X / 6X On-Chip DC-DC Converter
• On-Chip Oscillator
• Software Selectable On-Chip Bias Dividers
• Programmable 1/4, 1/5, 1/6, 1/7, 1/8, 1/9 and 1/10 bias ratio
• Maximum +15.0V LCD Driving Output Voltage
• Hardware pin selectable for 8-bit 6800-series Parallel Interface, 8-bit 8080-series Parallel Interface, 3-wire Serial Peripheral Interface or 4-wire Serial Peripheral Interface
• On-Chip 128 x 65/81 Graphic Display Data RAM
• Re-mapping of Row and Column Drivers
• Vertical Scrolling
• Display Offset Control
• 64 Levels Internal Contrast Control
• External Contrast Control
• Maximum 17MHz SPI or 15MHz PPI operation
• Selectable LCD Driving Voltage Temperature Coefficients (2 settings)
• Available in Gold Bump Die and Standard TAB (Tape Automated Bonding) Package