The LC75818PT is 1/8 to 1/10 duty dot matrix LCD display controllers/drivers that support the display of characters, numbers, and symbols. In addition to generating dot matrix LCD drive signals based on data transferred serially from a microcontroller, the LC75818PT also provide on-chip character display ROM and RAM to allow display systems to be implemented easily. These products also provide up to 4 general-purpose output ports and incorporate a key scan circuit that accepts input from up to 30 keys to reduce printed circuit board wiring.

• Key input function for up to 30 keys
• Sleep mode feature
• Built-in display adjustment circuit
• A voltage detection type reset circuit is provided.
• Controls and drives a 5x7, 5x8, or 5x9 dot matrix LCD.
• Supports accessory display segment drive (up to 80 segments)
• Display technique
• : 1/8 duty 1/4 bias drive (5x7 dots)
• : 1/9 duty 1/4 bias drive (5x8 dots)
• : 1/10 duty 1/4 bias drive (5x9 dots)
• Display digits: 16 digits1 line (5x7 dots, 5x8 dots, 5x9 dots)
• Display control memory
• CGROM: 240 characters (5x7, 5x8, or 5x9 dots)
• CGRAM: 16 characters (5x7, 5x8, or 5x9 dots)
• ADRAM: 16x5 bits
• DCRAM: 64x8 bits
• Instruction function
• Display on/off control
• Display shift function
• The frame frequency of the common and segment output waveforms can be controlled by instructions.
• Serial data I/O supports 'computer control bus' format communication with the system controller.
• Independent LCD driver block power supply VLCD
• The INH pin is provided. This pin turns off the display, disables key scanning, and forces the general-purpose
• output ports to the low level.
• RC oscillator circuit