Circuitos

DISPLAY UNIT USER’S MANUAL

Dot-Matrix LCD Units
(with built-in controllers)

LIFE SUPPORT POLICY SHARP components should not be used in medical devices with life support functions or in safety equipment (or similiar applications where component failure would result in loss of life or physical harm) without the written approval of an officer of the SHARP Corporation.

LIMITED WARRANTYSHARP warrants to its Customer that the Products will be free from defects in material and workmanship under normal use and service for a period of one year from the date of invoice. Customer’s exclusive remedy for breach of this warranty is that SHARP will either (i) repair or replace, at its option, any Product which fails during the warranty period because of such defect (if Customer promptlyreported the failure to SHARP in writing) or, (ii) if SHARP is unable to repair or replace, refund the purchase price of the Product upon its return to SHARP. This warranty does not apply to any Product which has been subjected to misuse, abnormal service or handling, or which has been altered or modified in design or construction, or which has been serviced or repaired by anyone other than Sharp. Thewarranties set forth herein are in lieu of, and exclusive of, all other warranties, express or implied. ALL EXPRESS AND IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR USE AND FITNESS FOR A PARTICULAR PURPOSE, ARE SPECIFICALLY EXCLUDED. In no event will Sharp be liable, or in any way responsible, for any incidental or consequential economic or property damage.

Theabove warranty is also extended to Customers of Sharp authorized distributors with the following exception: reports of failures of Products during the warranty period and return of Products that were purchased from an authorized distributor must be made through the distributor. In case Sharp is unable to repair or replace such Products, refunds will be issued to the distributor in the amount ofdistributor cost.

SHARP reserves the right to make changes in specifications at any time and without notice. SHARP does not assume any responsibility for the use of any circuitry described; no circuit patent licenses are implied.

© 1999 SHARP Microelectronics of the Americas

Printed in the USA.

Dot-Matrix LCD Units

Contents
PREFACE . . . . . . . . . . . . . . . . . . . . . . . . . .. 2 FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . 3 OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . 3 HARDWARE . . . . . . . . . Interface Signals . . . . Functional Blocks . . . . Microprocessor Interface Reset Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . 4 . 4 . 4 11 12

INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . 15 General Information . . . . . . . . . . . . . . . . . . . 15 Description of Instruction . . . . . . . . . . . . . . . . 15 ELECTRICAL CHARACTERISTICS . . . Absolute Maximum Ratings . . . . . Electrical Characteristics . . . . . . Timing Characteristics . . . . . . . . Power Conditions forInternal Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 19 19 19 20 21 21 24 24

LCD UNIT USAGE INSTRUCTIONS . . . Interface with External Microprocessor Contrast Control Voltage . . . . . . . Sample Instruction Procedures . . . .

HANDLING INSTRUCTIONS . . . . . . .. . . . . . . . . 28 OPERATING RESTRICTIONS . . . . . . . . . . . . . . . 29

Display Unit User’s Manual

1

Dot-Matrix LCD Units

PREFACE
The Sharp dot-matrix LCD units, with built-in controllers, operate under the control of a 4-bit or 8-bit microcomputer to display alphanumeric characters, symbols, etc. The LCD unit provides the user with a dot-matrix display panel featuring simple...