Overview

The LC75808E and LC75808W are 1/8 to 1/10 duty LCD display drivers that can directly drive up to 600 segments and can control up to four general-purpose output ports. These products also incorporate a key scan circuit that accepts input from up to 30 keys to reduce printed circuit board wiring.

Features

• Key input function for up to 30 keys (A key scan is performed only when a key is pressed.)

• 1/8duty–1/4bias, 1/9duty–1/4bias, and 1/10duty–1/4bias drive schemes can be controlled from serial data.

1/8duty–1/4bias: up to 480 segments

1/9duty–1/4bias: up to 540 segments

1/10duty–1/4bias: up to 600 segments

• Sleep mode and all segments off functions that are controlled from serial data.

• Serial data I/O supports CCB format communication with the system controller.

• Direct display of display data without the use of a decoder provides high generality.

• Built-in display contrast adjustment circuit.

• Up to 4 general-purpose output ports are included.

• Independent LCD driver block power supply VLCD.

• Provision of an on-chip voltage-detection type reset circuit prevents incorrect displays.

• 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.