¡ Semiconductor

MSM6786

1/17

FEDL6786-03

¡ Semiconductor

MSM6786

1/3, 1/4 DUTY LCD DRIVER WITH 4-DOT COMMON DRIVER AND 29-DOT SEGMENT DRIVER

GENERAL DESCRIPTION

The MSM6786 is a dynamic display LCD driver and can be switched to 1/3 or 1/4 duty. It can

dis-play up to 116 segments with 1/4 duty and up to 87 segments with 1/3 duty. It can also drive

one LED directly. The built-in 5¥6 key circuit allows input through a keyboard, and minimizes

the number of wires between the front panel and CPU.

FEATURES

• Power suppy voltage

: 5V

±10%

• Operating temperature

: –40 to +85

°C

• 29-output segment driver

1/4 duty dynamic drive

: Up to 116 segments can be displayed

1/3 duty dynamic drive

: Up to 87 segments can be displayed

• Built-in 5¥6 key scan circuit allows reading of the operation status of up to 30 switches.

• Interface with CPU is implemented by LOAD, DATA I/O and CLOCK in serial method.

• Built-in RC oscillator for LCD AC drive

• Built-in voltage dividing resistor for bias voltage generation

• Package:

56-pin plastic QFP (QFP56-P-910-0.65-2K) (Product name : MSM6786GS-2K)

FEDL6786-03

This version: Sep. 2000

Previous version: Nov. 1997