LC75817E

Ordering number : EN6144 CMOS IC LC75817E, 75817W 1/8 to 1/10 Duty Dot Matrix LCD Display Controller/Driver with Key Input Function Overview The LC75817E and LC75817W are 1/8 to 1/10 duty dot matrix LCD display controller/drivers that supports 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 LC75817E and LC75817W 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. Built-in display contrast adjustment circuit Up to 4 general-purpose output ports are included. Serial data I/O supports CCB format communication with the system controller. Independent LCD drive 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 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 60 segments) Display technique: 1/8 duty 1/4 bias drive (5 × 7 d...