Table of Contents
Paragraph Title Page
Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464 S03875–06–0214
Van Nuys, California SCALE N/A REV A SHEET 2
1.0 GENERAL INFORMATION...............................................................................................................5
1.1 Introduction.......................................................................................................................................5
1.2 Application........................................................................................................................................5
1.3 Standard Features ...........................................................................................................................5
1.4 Description.......................................................................................................................................5
2.0 LOGICAL STRUCTURE AND FUNCTION......................................................................................6
2.1 LCD Module......................................................................................................................................6
2.1.1 Signal Description............................................................................................................................6
2.2 LCD Controller.................................................................................................................................7
2.2.1 Instruction Register (IR)...................................................................................................................7
2.2.2 Data Register (DR)..........................................................................................................................7
2.2.3 Busy Flag.........................................................................................................................................7
2.2.4 Address Counter (AC)......................................................................................................................7
2.2.5 Display Data RAM (DD RAM) ..........................................................................................................7
2.2.6 Character Generator ROM (CG ROM)............................................................................................8
2.2.7 Character Generator RAM (CG RAM)..............................................................................................9
2.2.8 Parallel/Serial Data Conversion Circuitry, Timing Generator Circuitry............................................9
3.0 THEORY OF OPERATION............................................................................................................10
3.1 Serial Interface...............................................................................................................................10
3.2 Error Detection and Reporting.......................................................................................................10
3.3 Power–up Sequence......................................................................................................................11
3.4 Transmission Sequence for Instructions.......................................................................................11
3.5 Instruction Set................................................................................................................................12
3.5.1 Instruction Summary......................................................................................................................13
3.5.2 Sample Instructions In BASIC........................................................................................................13
3.6 Down–Loadable Special Characters.............................................................................................14
3.7 Self–test.........................................................................................................................................16
3.8 Diagnostics....................................................................................................................................16
4.0 INTERFACE AND CONTROL.......................................................................................................16
4.1 Connector Assignment (P2)..........................................................................................................16
4.2 Jumper Settings.............................................................................................................................16
5.0 ELECTRICAL SPECIFICATIONS..................................................................................................16
5.1 Absolute Maximum Ratings ...........................................................................................................16
5.2 Normal Operating Ratings .............................................................................................................16
5.2.1 Power–up Supply Requirements...................................................................................................16
5.2.2 External Reset Requirements........................................................................................................16
5.3 Interface Signals.............................................................................................................................16
5.3.1 Serial Interface Signals ..................................................................................................................16
6.0 ENVIRONMENTAL CHARACTERISTICS......................................................................................16
6.1 Operating........................................................................................................................................16
