IEE 03875-06-0114 User manual

APPLICATION REVISIONS
NEXT ASSY FINAL ASSY LTR DESCRIPTION DATE APPROVED
–PRODUCTION RELEASE/E.O. 30145 12/2/94 D. Goodale
AE.O. 36743, Revised and Redrawn 2/13/02 D. Goodale
Specification
4 x 20 Daystar Nova LCD Module
With
Parallel Data Input and Fiber Optic Backlight
Model 03875–06–0114
REV AAAAAAAAAAAAAAAAAAAAAA
SHEET 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
REVISION STATUS
PROJ. NO. 411 CONTRACT INDUSTRIAL ELECTRONIC ENGINEERS, INC.
VAN NUYS, CALIFORNIA
DRAWN R. January 3–19–93 PARALLEL DATA INPUT
CHECK 4 X 20 LCD MODULE WITH FIBER–OPTIC BACKLIGHT
NOTICE IS HEREBY GIVEN THAT THIS DRAWING IS PART
OF A PROPRIETARY ITEM OWNED BY INDUSTRIAL
APPROVED SIZE CODE IDENT NO.
ELECTRONIC ENGINEERS, INC. AND SHALL NOT BE
REPRODUCED, OR COPIED OR USED AS THE BASIS FOR
MANUFACTURE OR SALE OF APPARATUS WITHOUT
D. Goodale 12-2-94 A05464 S03875–06–0114
WRITTEN PERMISSION OF I.E.E. INC. APPROVED SCALE SHEET 1OF 22

Table of Contents
Paragraph Title Page
Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 2
1.0 GENERAL INFORMATION............................................................................................................................5
1.1 Introduction....................................................................................................................................................5
1.2 Application.....................................................................................................................................................5
1.3 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 OPERATION...............................................................................................................................................10
3.1 Instruction Set.............................................................................................................................................10
3.2 Power Up Instructions Sequence...............................................................................................................11
3.3 Instructions Affecting the Relationship of Display Position, Cursor, and DD RAM Address......................11
3.4 Instructions Affecting Custom Characters..................................................................................................12
4.0 ELECTRICAL SPECIFICATIONS...............................................................................................................12
4.1 Absolute Maximum Rating..........................................................................................................................12
4.2 Normal Operating Rating............................................................................................................................12
4.3 Electrical Characteristics (VCC = 5V ±10%)................................................................................................13
4.4 Timing Characteristics................................................................................................................................13
4.5 Timing Sequence for 8 Bit Parallel Interface...............................................................................................13
4.6 Timing Sequence for 4 Bit Parallel Interface...............................................................................................13
4.7 Connector Pin Assignments (P1)...............................................................................................................13
5.0 ENVIRONMENTAL CHARACTERISTICS...................................................................................................13
5.1 Operating.....................................................................................................................................................13
5.2 Non–Operating............................................................................................................................................13
6.0 OPTICAL SPECIFICATIONS......................................................................................................................13
6.1 Optical Characteristics...............................................................................................................................13
6.2 Viewing Angle Adjustment...........................................................................................................................13
7.0 FIBER OPTIC BACKLIGHT ........................................................................................................................13
7.1 FO Backlight Description............................................................................................................................13
7.2 Lamps Characteristics................................................................................................................................13

Table of Contents
Paragraph Title Page
Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 3
7.3 Standard Operation.....................................................................................................................................13
8.0 INSTALLATION NOTE................................................................................................................................13
9.0 ACCESSORIES..........................................................................................................................................13
10.0 OUTLINE and mounting characteristics.....................................................................................................13

List of Figures
Figure Title Page
Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 4
Figure 1 LCD Module Block Diagram ..................................................................................................................6
Figure 2 LCD Controller Block Diagram..............................................................................................................7
Figure 3 Correspondence Between Character Codes and Character Patterns.................................................8
Figure 4 Relationship Between CG RAM Address, Character Codes (DD RAM) and Character Patterns (CG
RAM Data)........................................................................................................................................9
Figure 5 LCD Controller Instruction Set.............................................................................................................10
Figure 6 Initial Conditions on Power Up.............................................................................................................11
Figure 7 Display Shift Left from Initial Conditions ..............................................................................................11
Figure 8 Display Shift Right from Initial Conditions............................................................................................12
Figure 9 Load Character with S=1, I/D=0 from Initial Conditions ......................................................................12
Figure 10 Load Character with S=1, I/D=1 from Initial Conditions ......................................................................12
Figure 11 Interface Timing (Write).......................................................................................................................13
Figure 12 Interface Timing (Read).......................................................................................................................13
Figure 13 Busy Flag Check Sequence for 8–bit Parallel Interface......................................................................13
Figure 14 Busy Flag Check Sequence for 4–bit Parallel Interface......................................................................13
Figure 15 Definition of Vertical Viewing Angle......................................................................................................13
Figure 16 Definition of Horizontal Viewing Angle..................................................................................................13
Figure 17 Definition of Contrast Ratio (CR).........................................................................................................13
Figure 18 Definition of Optical Response............................................................................................................13
Figure 19 Typical Lamp Characteristics..............................................................................................................13
Figure 20 03875–06–0114 Outline Drawing........................................................................................................13

Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 5
1.0 GENERAL INFORMAT ION
1.1 Introduction
This specification describes the parallel interface Daystar Nova model 03805–06–0114, a 4–line supertwisted
liquid crystal display (LCD) with 20 characters per line.
Model Number Designation System
03875 – 06 – 0 1 1 4
Transflective STN
LCD w/FO Backlight 4x20 Format Reserved 1 = Parallel Data Input *
2 = Serial Data Input 1 = 5 VDC 4 = White
*Parallel standard, Serial optional
1.2 Application
Daystar Nova modules provide alphanumeric information which is easily readable in high ambient light or in
darkness with the installed Fiber Optic (FO) backlight. The low power requirements of the modules make them
suitable for portable battery operated equipment. The wide operating temperature range (–30° to +80°C) is
ideal for most outdoor applications. The choice of a preferential viewing hemisphere is not necessary because
of the excellent wide angle viewing characteristics of the new Super Bi–refringent Effect (SBE) liquid crystal cell
used in this display.
For applications where the display is remotely located up to 50 feet from the host processor, the serial data
input option should be used. The serial option model is described in IEE specification S03875–06–0214.
1.3 Description
The Daystar Nova module is a self–contained 1/16 multiplexed unit. A simple parallel interface is provided and
can be configured as either 4 or 8 bits. The on–board microprocessor controls the display, multiplexing and
character decoding. The temperature compensation circuitry guarantees that the viewing characteristics are
optimized for all temperatures.
The SBE liquid crystal cell used in this display has a golden–green background with dark blue–black
characters.
The on–board character generator ROM generates 192 types of alphanumeric, numeric, katakana characters
and symbols. In addition, a character generator RAM allows the user to define eight additional characters.
A variety of high level functions allow the programmer to operate the display with simple and straightforward
software routines. One such feature automatically increments the character display position after each
character is written.
A single +5 Volt nominal power supply is required for operation of the LCD module. The unit operates from 4.50
Volts to 5.50 Volts. The typical power requirement for the module is 40mW.
The module weighs 6.3 oz. (179 grams).

Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 6
2.0 LOGICAL STRUCTURE AND FUNCTION
2.1 LCD Module
Figure 1 illustrates the major components of the serial option Daystar Nova module. The module provides
means for an external viewing angle adjustment potentiometer (VBIAS Adj.) at Pin 4, and connections for optional
RESET and self–test switches at Pins 3 and 5. The external viewing angle adjustment potentiometer should be
connected to the same +5 Volt supply as the display module. RESET and TEST pull down to ground to
activate the function. All three inputs may be left open if not used. The VBIAS test point is used at the factory to
preset the viewing angle. The LCD Controllers are microprocessor units (MPU) designed specifically to control
all multiplexing and character decoding functions for the LCD display.
ERS R/W DB 7DB 4DB DB
3 0
LCD Controller
LCD Row Drivers and
Shift Registers
LCD Column Drivers
and Shift Registers
LCD Display
Temperature Compensation
V
CC(+5V) Gnd
FO Backlight
8” Flying Leads
Figure 1LCD Module Block Diagram
2.1.1 Signal Description
Signal Name Number Of Lines Input/Output Connected
RS 1ILCD Controller
R/W 1ILCD Controller
E1ILCD Controller
DB4–DB74I/O LCD Controller
DB0–DB34I/O LCD Controller
VCC 2 – Power
GND 7 – –

Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 7
2.2 LCD Controller
DB4–DB7
E
R/W
RS
DB0–DB3
4
4
I/O Buffer
Instruction
Decoder
Instruction
Register (IR) Data
Register (DR)
Busy
Flag
I/O Buffer
8
Character
Generator
RAM
(CG RAM)
512 Bits
Cursor Blink
Control Circuit
Display Data
RAM
(DD RAM)
80x8 bits
8
88
Character
Generator
ROM
(CG ROM)
7200 Bits
8
7
7
Timing Generation
Circuit
Address
Counter (AC)
7
Common Signal
Driver
16–bit Shift
Register
3
16 16
CL1
CL2
M
Parallel/Serial Data
Conversion Circuit
(Parallel Data –Serial Data)
40–bit Latch
Circuit
Segment Signal
Driver
40–bit Shift Register
Seg1–Seg40
Com1–Com16
D
5 5
40
Figure 2LCD Controller Block Diagram
2.2.1 Instruction Register (IR)
The IR stores instruction codes such as display clear and cursor shift, and address information of the display
data RAM (DD RAM) and character generator RAM (CG RAM). The IR can be written from the MPU, but not
read.
2.2.2 Data Register (DR)
The DR temporarily stores data to be written into or read from the DD RAM or the CG RAM.
2.2.3 Busy Flag
When the Busy Flag is a "1", the module is in an internal operating mode and ignores any additional instructions
(Refer to Read Busy Flag and Address instruction).
2.2.4 Address Counter (AC)
The AC determines the address of the DD RAM or CG RAM in which new data is stored. After writing into (or
reading from) the DD RAM or CG RAM, the AC is incremented or decremented as defined by the
Increment/Decrement bit (Refer to Entry Mode Set instruction).
2.2.5 Display Data RAM (DD RAM)
The DD RAM contains 80 X 8 bits and represents 80 characters. The relationship between the DD RAM
address and position of the characters in the display can be controlled by the user (Refer to Entry Mode Set and
Cursor or Display Shift instructions).
2.2.6 Character Generator ROM (CG ROM)
The CG ROM generates character patterns of 5 X 7 dots from 8 bit character codes. The 192 5 X 7 dot matrix

Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 8
characters are illustrated in Figure 3.
Figure 3Correspondence Between Character Codes and Character Patterns
Note:Addresses 00h through 0Fh are reserved for CG RAM Addressing. Addresses 10h through 1Fh and
80h through 9Fh are not used.

Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 9
2.2.7 Character Generator RAM (CG RAM)
The CG RAM allows the user to define 8 types of 5 X 7 character patterns. Figure 4 shows the relationship
between CG RAM addresses and data patterns (Refer to Set CG RAM Address and Write to CG or DD RAM
instructions).
Character Codes
(DD RAM Data) CG RAM Address Character Patterns (CG RAM Data)
76543210 543210 76543210
←Higher Order Bits
Lower Order Bits→←Higher Order Bits Lower Order Bits→←Higher Order Bits Lower Order Bits→
000 ***11110
001 10001
010 10001Character
011 11110Pattern
0000*000 000100 10100Example
101 10010
110 10001
111 ***00000←Cursor
Figure 4Relationship Between CG RAM Address, Character Codes (DD
RAM) and Character Patterns (CG RAM Data)
NOTES:
1) The CG RAM consists of 64 bytes. Any bytes not used for character pattern information can be
used for general purpose data RAM. The 5, 6 and 7 bits are never used for character pattern
information and are always available for use.
2) The 0, 1 and 2 bits of character code correspond to the 3, 4 and 5 bits of the CG RAM address.
3) The 0, 1 and 2 bits of the CG RAM address specify the row of the character pattern.
4) The 8th row of the character pattern corresponds to the cursor character pattern. If any bit in the
row is "1", then the corresponding cursor bit is a "1" regardless of cursor position. (For most
applications, the data should be "0" in this row, which allows for normal cursor operation on the
character.)
5) Since bit 3 is a "don't care", two character codes represent the same special character. For
example, a character code of 07 (hexadecimal) selects the same character pattern as OF
(hexadecimal).
2.2.8 Parallel/Serial Data Conversion Circuitry, Timing Generator Circuitry
These blocks control the interface to the LCD drivers.

Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 10
3.0 OPERATION
3.1 Instruction Set
Instruction Code Description Execution
RS R/W DB7DB6DB5DB4DB3DB2DB1DB0Time (Max)
Clear Display 0 000000001Clears entire display and sets DD RAM to 0 1.64 ms
Return Home 0 00000001*
Sets DD RAN counter to 0. If the display has been
shifted, characters are returned to their initial
positions. DD RAM contents remain unchanged. 1.64 ms
Entry Mode Set 0 0 0 0 0 0 0 1 I/D SSets shift register direction and cursor movement
direction which occur during data read and write
operations
40µs
Display ON/OFF
Control 0 000001DCBTurns ON/OFF the entire display (D), cursor) and cursor blink attribute (B). 40µs
Cursor or Display
Shift 0 0 0 0 0 1 S/C R/L * * Moves cursor or shifts entire display one position. DD RAM contents are unchanged. 40µs
Function Set 0 0 0 0 1 DL 1 0 * * Sets Interface Data Length. 40µs
Set CG RAM
Address 0 0 0 1 Sets CG RAM address. CG RAM data is sent or received after this is set. 40µs
Set DD RAM
Address 0 0 1 Sets DD RAM address. DD RAM data is sent or received after this is set. 40µs
Read Busy Flag
and Address 0 1 BF Reads Busy Flag (BF) and Address Counter 0µs
Write Data to CG
or DD RAM 1 0 Writes data into CG RAM or DD RAM. 40µs
Read Data from
CG or DD RAM 1 1 Reads data from CG RAM or DD RAM. 40µs
I/D=1: Increment DD RAM: Display Data RAM
I/D=0: Decrement CG RAM: Character Generator RAM
S=1: Enable Shift Operation ACG CG RAM Address
S/C=1: Shift Display ADD DD RAM Address
S/C=0: Shift Cursor (Corresponds to cursor address)
R/L=1: Shift Right AC Address Counter
R/L=0: Shift Left (used for both CG and DD RAM)
DL=1: 8–bit operation *Don’t Care
DL=0: 4–bit operation
BF=1: Operating internally
BF=0: Can accept instruction
Figure 5LCD Controller Instruction Set

Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 11
3.2 Power Up Instructions Sequence
Upon power up, the Daystar Nova module is set to a default mode of operation. Under some power up
circumstances, the default mode may be improperly set. Consequently, the following instructions should
always be executed in the host systems initialization routine.
Step Operation
1Function Set for 8 bits
2Repeat, Function Set for 8 bits
3Function Set
4Clear Display
5Entry Mode Set
6Display On/Off Control
STEP RS R/W DB7DB6DB5DB4DB3DB2DB1DB0
1000011* * * *
2000011* * * *
3 0 0 0 0 1 DL 1 0 * *
40000000001
500000001I/D S
6 0 0 0 0 0 0 1 D C B
Refer to instruction set for values of DL, I/D, S, D, C and B. (* Don't care)
3.3 Instructions Affecting the Relationship of Display Position, Cursor, and DD RAM Address
The DD RAM contains the 8 bit character codes of the 40 characters displayed on the Daystar Nova LCD. The
Cursor or Display Shift instruction and the Write to DD RAM and Entry Mode instructions affect the relationship
between DD RAM address and display position. Figures 6 to 10 illustrate the effects of these instructions.
00* 01 02 03 04 05 06 07 08 09 0A 0E 0F 10 11 12 13
40 41 42 43 44 45 46 47 48 49 4A 4E 4F 50 51 52 53
14 15 16 17 18 19 1A 1B 1C 1D 1E 22 23 24 25 26 27
54 55 56 57 58 59 5A 5B 5C 5D 5E 62 63 64 65 66 67
* = Cursor
Figure 6Initial Conditions on Power Up
01 02 03 04 05 06 07 08 09 0A 0B 0F 10 11 12 13 14
41 42 43 44 45 46 47 48 49 4A 4B 4F 50 51 52 53 54
15 16 17 18 19 1A 1B 1C 1D 1E 1F 23 24 25 26 27 00*
55 56 57 58 59 5A 5B 5C 5D 5E 5F 63 64 65 66 67 40
* = Cursor
Figure 7Display Shift Left from Initial Conditions

Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 12
27 00* 01 02 03 04 05 06 07 08 09 0D 0E 0F 10 11 12
67 40 41 42 43 44 45 46 47 48 49 4D 4E 4F 50 51 52
13 14 15 16 17 18 19 1A 1B 1C 1D 21 22 23 24 25 26
53 54 55 56 57 58 59 5A 5B 5C 5D 61 62 63 64 65 66
* = Cursor
Figure 8Display Shift Right from Initial Conditions
01* 02 03 04 05 06 07 08 09 0A 0B 0F 10 11 12 13 14
41 42 43 44 45 46 47 48 49 4A 4B 4F 50 51 52 53 54
15 16 17 18 19 1A 1B 1C 1D 1E 1F 23 24 25 26 27 00#
55 56 57 58 59 5A 5B 5C 5D 5E 5F 63 64 65 66 67 40
* = Cursor
# = Last Character Entered
Figure 9Load Character with S=1, I/D=0 from Initial Conditions
27* 00# 01 02 03 04 05 06 07 08 09 0D 0E 0F 10 11 12
67 40 41 42 43 44 45 46 47 48 49 4D 4E 4F 50 51 52
13 14 15 16 17 18 19 1A 1B 1C 1D 21 22 23 24 25 26
53 54 55 56 57 58 59 5A 5B 5C 5D 61 62 63 64 65 66
* = Cursor
# = Last Character Entered
Figure 10 Load Character with S=1, I/D=1 from Initial Conditions
3.4 Instructions Affecting Custom Characters
The module allows the user to define 8 unique special characters. The pattern of the characters is stored in the
CG RAM. The relationship between the CG RAM address and the character pattern is illustrated in Figure 4.
The Read Data from CG RAM, Write Data to CG RAM, and Set DD RAM instructions provide for easy
programmability.
4.0 ELECTRICAL SPECIFICATIONS
4.1 Absolute Maximum Rating
Power Supply Voltage (VCC)–0.3 to +6.5 VDC
Input Voltage –0.3 to +VCC +0.3 VDC
4.2 Normal Operating Rating
Power Supply Voltage (VCC)+5.0 Volts ±10%
Supply Current (VCC = 5 VDC)10 mA +2 mA
Backlight Current (+5 Volt) 900 mA

Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 13
4.3 Electrical Characteristics (VCC = 5V ±10%)
Item Symbol Condition Min Max Unit
Input "High" Voltage VIH 2.2 VCC V
Input "Low" Voltage VIL –0.3 0.6 V
Output "High" Voltage (TTL) VOH1 IOH = 0.205 mA 2.4 –V
Output "Low" Voltage (TTL) VOL1 IOL = 1.200 mA –0.4 V
Output "High" Voltage (CMOS) VOH2 IOH = 0.040 mA 0.9 VCC –V
Output "Low" Voltage (CMOS) VOL2 IOL = 0.040 mA –0.1 VCC V
Input Leakage Current IIL VIN = 0 to VCC –0.001 mA
Supply Current (logic) ICC 6 12 mA
Supply Current (Backlight) IBL VBL = +5.5 VDC 1A mA
4.4 Timing Characteristics
Write Operation (Refer to Figure 11)
Item Symbol Min Max Unit
Enable Cycle Time tCYC 1000 – ns
Enable Pulse Width "High Level" PWEH 450 – ns
Enable Rise/Fall Time tEr, tEf – 25 ns
Address Set–up Time RS,R/W tAS 140 – ns
Address Hold Time tAH 10 – ns
Data Set–up Time tDSW 195 – ns
Data Hold Time tH10 – ns
Read Operation (Refer to Figure 12)
Item Symbol Min Max Unit
Enable Cycle Time tCYC 1000 – ns
Enable Pulse Width "High Level" PWEH 450 – ns
Enable Rise/Fall Time tEr, tEf – 25 ns
Address Set–up Time RS,R/W tAS 140 – ns
Address Hold Time tAH 10 – ns
Data Delay Time tDDR – 320 ns
Data Hold Time tDHR 20 – ns

Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 14
Figure 11 Interface Timing (Write)
Figure 12 Interface Timing (Read)
Valid Data
t
t
AS
PWEH tAH
tAH
DSW
ttH t
VIL1
VIL1
VIL1 VIL1
VIL1
VIL1 VIL1
V
IH1
V
IH1 VIH1
VIH1
V
IH1
VIL1
RS
R/W
E
DB 0 7 – DB
cyc
tttttt
tEf tttttt
Er
Valid Data
t
t
AS
PWEH tAH
tAH
t
VIL1
VIL1 VIL1
VIL1 VIL1
VIH1
VIH1 V
IH1
V
IH1
RS
R/W
E
DB0 7 – DB
cyc
VIH1 V
IH1
Er
tEf
tDHR
IH1
tDDR
V
V
OL1
OH1

Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 15
4.5 Timing Sequence for 8 Bit Parallel Interface
Figure 13 illustrates the typical Busy Flag check sequence for an 8 bit data interface.
Figure 13 Busy Flag Check Sequence for 8–bit Parallel Interface
4.6 Timing Sequence for 4 Bit Parallel Interface
Figure 14 illustrates the typical Busy Flag check sequence for a 4 bit data bus interface.
Figure 14 Busy Flag Check Sequence for 4–bit Parallel Interface
Note: IR7, IR3:Instruction, 7th bit & 3rd bit
AC3:Address Counter, 3rd bit
Data Busy Busy IR 7
Not
Busy
Internal Operation
Instruction
Write
Instruction
Write Busy Flag Check Busy Flag Check Busy Flag Check
DB7
Internal
E
R/W
RS
DB IR7IR 7IR
3AC 3D3
AC 3
Busy Not Busy
7
Internal Operation
E
RS
Instruction
Write Busy Flag Check Busy Flag Check Instruction Write

Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 16
4.7 Connector Pin Assignments (P1)
Pin No. Function
1N/C
2VBIAS (Factory Set–up Test Point)
3N/C *
4ADJ (Viewing Angle Adjustment)
5R/W (Read = Logic 1)
6Key (Pin Removed)
7RS
8Ground
9Enable (E1)
10 Ground
11 DB0
12 Ground
13 DB1
14 Ground
15 DB2
16 Ground
17 DB3
18 Ground
19 DB4
20 Ground
21 DB5
22 VCC (+5VDC – Parallel with Pin 24)
23 DB6
24 VCC (+5VDC – Parallel with Pin 22)
25 DB7
26 N/C
*When the display module includes the serial data input option, Pin 3 is internally connected to provide
signal E2 as an output to a second display module.
CMOS Note: Care must be taken to insure that input signals do not exceed the supply voltage or ground
levels. Data cables must be as short as possible to reduce signal overshoots.

Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 17
5.0 ENVIRONMENTAL CHARACTERISTICS
5.1 Operating
Temperature: –30 to +80°C
Humidity: (@ 40ºC) 95% RH (non–condensing)
Humidity (<40°C): Absolute humidity must be lower the humidity of 95% RH at 40°C
Vibration: 10g at 10 to 400Hz (3 axes)
Shock: 10g (all axes)
5.2 Non–Operating
Temperature: –40°C to +85°C
6.0 OPTICAL SPECIFICATIONS
6.1 Optical Characteristics
Format: Four lines of 20 characters
Character Font: 5x7 dot matrix with cursor
Character Height w/ cursor: 0.48" (12.1mm)
Character Height w/o cursor: 0.39" (9.9mm)
Character Width: 0.24" (6.1mm)
Overall Active Area: 5.70" x 2.34" (144.9mm x 59.5mm)
Peak Vertical Viewing Angle: 20° below normal plane
Viewing Mode: Transflective, light field
Item Symbol Condition Min Typ Max Unit
Viewing Angle–Vertical φ1–φ2CR = 2.0, θ= 0° 100 120 – deg.
Viewing Angle–Horizontal* TCR = 2.0 ±45 ±55 –deg.
Contrast ratio (Peak)** CR 25°C 10 18 – –
Response time (ON)** tr25°C – 100 150 mS
–30°C – 2000 – mS
Response time (OFF)** tf25°C – 150 200 mS
–30°C – 4000 – mS
* Measured at peak vertical angle, φ= –20°
** Measured at peak viewing angles:

Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 18
–X +X
–Y
+Y
Normal
φ= +90º
φ1
φ2
φ= –90º
Figure 15 Definition of Vertical Viewing Angle
Definition of Horizontal Viewing Angle–top Viewing Display (for Bottom Viewing Displaysφ= –20°
Typically)
–X +X
–Y
+Y
Normal
φ= +20º
+θ
–θ
θ= –90º θ= +90º
Figure 16 Definition of Horizontal Viewing Angle
Display contrast ratio is given by:
CR B
B
=2
1Where: B1= Brightness of selected segment
B2= Brightness of non–selected segment

Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 19
Setpoint Driving Voltage
B2
B1
Brightness Curve for Selected Segment
Brightness Curve for Non–selected Segment
Figure 17 Definition of Contrast Ratio (CR)
Definition of optical response.
tt f
td
tt rd
90% ON
10% ON
Excitation
Figure 18 Definition of Optical Response
6.2 Viewing Angle Adjustment
The factory preadjusts the viewing angle of the display by setting the LCD bias voltage to 10.2 Volts using the
on–board potentiometer. This is considered to be a nominal adjustment, but the user may prefer to vary this to
optimize the viewing for a particular application. The bias voltage is measured between VCC (pin #22) and VBIAS
(pin #2).
The viewing angle and contrast ratio may be externally controlled using an additional 10K ohm potentiometer.
The potentiometer on the rear of the module must first be set to the maximum resistance by turning the
adjustment fully counterclockwise. A 10K ohm potentiometer can then be connected between pin numbers 4
and 22 on the connector. Since the module has wide viewing angle characteristics and built–in temperature
compensation of the viewing angle, the user may find that this external viewing control is unnecessary.

Industrial Electronic Engineers, Inc. SIZE
ACODE IDENT NO.
05464
S03875–06–0114
Van Nuys, California Scale: NONE Rev A Sheet 20
7.0 FIBER OPTIC BACKLIGHT
7.1 FO Backlight Description
The module contains a light emitting flat panel constructed of plastic optical fibers which convey the light from a
separately located light source. The panel is heat free, has indefinitely long life and has good brightness
uniformity. The optical fibers are gathered into a bundle at the end of the flat panel and are routed to the light
source.
The separately located light source is affixed to a bracket that mounts behind the display module using two of
the module mounting holes (see the outline drawing, Figure 20). If the increased module depth is not
acceptable, light source can be relocated elsewhere by the user within an approximate 2.5 inch radius (length
of the fiber bundle) from the end of the display module. The standard light source is a halogen 5.0 Volt, 4.85
Watt lamp with 8.0 inch leads terminated by a connector to be connected by the user.
Care should be exercised in the physical location of the light source since halogen lamps operate in excess of
250 C.
Because the attenuation of the LCD cell, only 10% of the backlight luminance is emitted from the display. Thus
to provide a brightly lit display, the original light source must be 10 times brighter.
7.2 Lamps Characteristics
The standard light source is a 4.85 Watt, 5.0 Volt halogen lamp. Figure 19 below shows the standard light
source and two alternates which use less power. They may be satisfactory for a display in low to no ambient
light and are available by special order.
Lamp
Power Rated Voltage Relative Brightness Rated Life (RL)Lamp Type
* 4.5 Watts 5.0 Volts 1.0 15k Hours Halogen
2.5 Watts 5.0 Volts 0.4 5k Hours Gas
1.5 Watts 12.0 Volts 0.4 15k Hours Incandescent
Figure 19 Typical Lamp Characteristics
These sources all include a reflector as part of the lamp, which focuses the light toward the polished end of the
fiber bundle.
Rated life is expressed for operation at design voltage with alternating currents under laboratory test conditions.
Actual life (LA) is very sensitive to applied voltage (VA) as expressed by the following equation where VRis the
rated design voltage.
LA= (RL) (VR/VA)12
The lamp may be powered by either AC or DC voltage. The 8.0” lamp leads are terminated in a Molex
connector P/N 50–57–9402. This mates with numerous Molex headers including the following:
70553–0106, PWB Mount
70107–0036, Panel Mount
70107–0001, Wire–To–Wire