onsemi LC75812PT
The LC75812PT is 1/8, 1/9 duty dot matrix LCD display controllers/drivers that support the display of characters, numbers, and symbols. These products also provide up to 3 general-purpose output ports and incorporate a key scan circuit that accepts input from up to 35 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 LC75812PT also provide on-chip character display ROM and RAM to allow display systems to be implemented easily.FEATURES
● Key input function for up to 35 keys (A key scan is performed only when a key is pressed.)● Controls and drives a 5×7 or 5×8 dot matrix LCD.
● Supports accessory display segment drive (up to 65 segments)
● Display technique: 1/8 duty 1/4 bias drive (5×7 dots) 1/9 duty 1/4 bias drive (5×8 dots)
● Display digits: 13 digits×1 line (5×7 dots), 12 digits×1 line (5×8 dots)
● Display control memory CGROM: 240 characters (5×7 or 5×8 dots) CGRAM: 16 characters (5×7 or 5×8 dots) ADRAM: 13×5 bits DCRAM: 52×8 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
● Switching between key scan output and general-purpose output ports can be controlled with instructions.
● PWM output for adjusting the LED backlight brightness
● The frame frequency of the common and segment output waveforms can be controlled by instructions.
● Serial data control of switching between the RC oscillator operating mode and external clock operating mode.