BU9729K 데이터 시트보기 (PDF) - ROHM Semiconductor

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BU9729K

Segment-type LCD driver

ROHM Semiconductor 

Standard ICs

Segment-type LCD driver

BU9729K

The BU9729K is a driver for segmented liquid crystal displays, which enables connection with a microcomputer

through a serial interface. 4-bit common output and an internal power supply circuit for LCD drive make it possible to

configure a low-cost display system.

•Applications

Movie projectors, car audio equipment, telephones

•Features

1) Serial interface (8-bit length).

2) Display RAM: 72bits, internal (up to 72 segments

can be displayed).

3) Internal power supply circuit for liquid crystal drive.

4) Display duty: 1 / 4.

5) Low-voltage and low-current operation supported.

•Block diagram

SD

SCK

C/D

CS

Serial

Interface

Address

Counter

Display Data RAM

(DD RAM)

LCD Driver

Bias Circuit

LCD

Segment

Driver

18bits

VLCD

VC

VDD

VSS

SEG1

SEG2

SEG18

Command / Data

Register

Command

Decoder

Timing

Generator

Common

Counter

LCD

Common

Driver

4bits

COM1

COM2

COM3

COM4

1

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