onsemi LC75818PT
The LC75818PT is 1/8 to 1/10 duty dot matrix LCD display controllers/drivers that support the display of characters, numbers, and symbols. 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. 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.FEATURES
● Key input function for up to 30 keys (A key scan is performed only when a key is pressed.)● Controls and drives a 5×7, 5×8, or 5×9 dot matrix LCD.
● Supports accessory display segment drive (up to 80 segments)
● Display technique: 1/8 duty 1/4 bias drive (5×7 dots) 1/9 duty 1/4 bias drive (5×8 dots) 1/10 duty 1/4 bias drive (5×9 dots)
● Display digits: 16 digits×1 line (5×7 dots, 5×8 dots, 5×9 dots)
● Display control memory CGROM: 240 characters (5×7, 5×8, or 5×9 dots) CGRAM: 16 characters (5×7, 5×8, or 5×9 dots) ADRAM: 16×5 bits DCRAM: 64×8 bits
● Instruction function Display on/off control Display shift function
● Sleep mode can be used to reduce current drain.
● Built-in display contrast adjustment circuit
● The frame frequency of the common and segment output waveforms can be controlled by instructions.
● Serial data I/O supports CCB format communication with the system controller.
● Independent LCD driver block power supply VLCD
● A voltage detection type reset circuit is provided to initialize the IC and prevent incorrect display.