LC75812PT Datasheet, PDF (1/54 Pages) Sanyo Semicon Device – 1/8, 1/9 Duty Dot Matrix LCD Display Controllers/Drivers with Key Input Function

Ordering number : ENA1417B
LC75812PT
CMOS IC
1/8, 1/9 Duty Dot Matrix LCD Display
Controllers/Drivers with Key Input Function
http://onsemi.com
Overview
The LC75812PT is 1/8, 1/9 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 LC75812PT also provide on-chip character display ROM and RAM to allow display systems to
be implemented easily. 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.
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.
• Independent LCD driver block power supply VLCD
• A voltage detection type reset circuit is provided to initialize the IC and prevent incorrect display.
• 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
• CCB is ON Semiconductor® ’s original format. All addresses are managed
by ON Semiconductor® for this format.
• CCB is a registered trademark of Semiconductor Components Industries, LLC.
Semiconductor Components Industries, LLC, 2013
July, 2013
31710HKIM 20100223-S00011,S00012,S00013/N1809HKIM/52709HKIM No.A1417-1/54