Table of Contents
Paragraph
Title
Page
Industrial Electronic Engineers, Inc.
SIZE
A
CODE IDENT NO.
05464
S03875–21–0214
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 ......................................................................................5
2.1
Module Block Diagram .....................................................................................................................5
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..............................................................................................................9
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 .......................................................................................................17
4.1
Connector Assignment (P2) ..........................................................................................................17
4.2
Jumper Settings .............................................................................................................................17
5.0
ELECTRICAL SPECIFICATIONS ..................................................................................................17
5.1
Absolute Maximum Ratings ...........................................................................................................17
5.2
Normal Operating Ratings .............................................................................................................17
5.2.1
Power–up Supply Requirements ...................................................................................................18
5.2.2
External Reset Requirements........................................................................................................18
5.3
Interface Signals.............................................................................................................................18
5.3.1
Serial Interface Signals ..................................................................................................................18
6.0
ENVIRONMENTAL CHARACTERISTICS......................................................................................19
6.1
Operating........................................................................................................................................19
