Overview

The LC75835W is a 1/3, 1/4 duty general-purpose LCD display driver that can be used for displaying segments for mobile devices and other such products under the control of a microcontroller. In addition to being able to directly drive up to 136 LCD segments, the LC75835W can also control up to 16 general-purpose output ports. It incorporates an oscillation circuit that reduces the external resistors and capacitors used for oscillation.

Features

• Either 1/4 or 1/3 duty can be selected with the serial control data.

1/4 duty drive: Up to 136 segments can be driven

1/3 duty drive: Up to 105 segments can be driven

• Either 1/3 or 1/2 bias can be selected with the serial control data.

• On, off, or blinking for each segment can be set with the serial control data.

• Serial data control of display switching in 40-bit units. (As a general rule, the display can be switched in 12 segment-units.)

• Serial data control of current on/off to the LCD drive bias voltage generation divider resistors.

• Serial data control of the power-saving mode based backup function and the all segments forced off function.

• Serial data control of switching between the segment output port and general-purpose output port functions.

• Buzzer control signals (1 channel) can be output from the general-purpose output port.

• Serial data control of the frame frequency of the common and segment output waveforms.

• Serial data control of the segment blinking frequency.

• Serial data control of switching between the internal oscillator operating mode and external clock operating mode.

• Serial data input supports CCB* format communication with the system controller.

• Independent VLCD for the LCD driver block (VLCD can be set to any voltage in the range 2.7 to 5.5 volts without regard to the logic block power supply VDD).

• The INH pin allows the display to be forced to the off state.

• Incorporation of an oscillator circuit