IEE Serial Interface, 4 lines x 20 characters, 12.1mm, F/O Backlight Specifications
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APPLICATION
NEXT ASSY FINAL ASSY LTR
–
A
REVISIONS
DESCRIPTION
PRODUCTION RELEASE/E.O. 30145
E.O. 36743, Revised and Redrawn
DATE
12/2/94
2/13/02
APPROVED
D. Goodale
D. Goodale
Specification
4 X 20 Daystar Nova LCD Module with
Serial Data Input Option and Fiber Optic Backlight
Model 03875–06–0214
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REVISION STATUS
PROJ. NO.
411 CONTRACT INDUSTRIAL ELECTRONIC ENGINEERS, INC.
VAN NUYS, CALIFORNIA
NOTICE IS HEREBY GIVEN THAT THIS DRAWING IS PART
OF A PROPRIETARY ITEM OWNED BY INDUSTRIAL
ELECTRONIC ENGINEERS, INC. AND SHALL NOT BE
REPRODUCED, OR COPIED OR USED AS THE BASIS FOR
MANUFACTURE OR SALE OF APPARATUS WITHOUT
WRITTEN PERMISSION OF I.E.E. INC.
DRAWN R. January
CHECK
APPROVED
3–19–93
D. Goodale 12-2-94
SERIAL DATA INPUT
4 X 20 LCD MODULE WITH FIBER OPTIC BACKLIGHT
SIZE CODE IDENT NO.
A 05464 S03875–06–0214
APPROVED
SCALE SHEET 1 OF 25
Paragraph
3.0
3.1
3.2
3.3
3.4
3.5
3.5.1
3.5.2
3.6
3.7
3.8
4.0
4.1
4.2
1.0
1.1
1.2
1.3
1.4
2.0
2.1
2.1.1
2.2
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.2.6
2.2.7
2.2.8
5.0
5.1
5.2
5.2.1
5.2.2
5.3
5.3.1
6.0
6.1
Table of Contents
Title Page
GENERAL INFORMATION...............................................................................................................5
Introduction.......................................................................................................................................5
Application ........................................................................................................................................5
Standard Features ...........................................................................................................................5
Description .......................................................................................................................................5
LOGICAL STRUCTURE AND FUNCTION ......................................................................................6
LCD Module......................................................................................................................................6
Signal Description ............................................................................................................................6
LCD Controller .................................................................................................................................7
Instruction Register (IR) ...................................................................................................................7
Data Register (DR) ..........................................................................................................................7
Busy Flag .........................................................................................................................................7
Address Counter (AC)......................................................................................................................7
Display Data RAM (DD RAM) ..........................................................................................................7
Character Generator ROM (CG ROM) ............................................................................................8
Character Generator RAM (CG RAM)..............................................................................................9
Parallel/Serial Data Conversion Circuitry, Timing Generator Circuitry............................................9
THEORY OF OPERATION............................................................................................................10
Serial Interface ...............................................................................................................................10
Error Detection and Reporting .......................................................................................................10
Power–up Sequence......................................................................................................................11
Transmission Sequence for Instructions .......................................................................................11
Instruction Set ................................................................................................................................12
Instruction Summary......................................................................................................................13
Sample Instructions In BASIC ........................................................................................................13
Down–Loadable Special Characters .............................................................................................14
Self–test .........................................................................................................................................16
Diagnostics ....................................................................................................................................16
INTERFACE AND CONTROL .......................................................................................................16
Connector Assignment (P2) ..........................................................................................................16
Jumper Settings .............................................................................................................................16
ELECTRICAL SPECIFICATIONS ..................................................................................................16
Absolute Maximum Ratings ...........................................................................................................16
Normal Operating Ratings .............................................................................................................16
Power–up Supply Requirements ...................................................................................................16
External Reset Requirements........................................................................................................16
Interface Signals.............................................................................................................................16
Serial Interface Signals ..................................................................................................................16
ENVIRONMENTAL CHARACTERISTICS......................................................................................16
Operating........................................................................................................................................16
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6.2
7.0
7.1
7.2
8.0
8.1
8.2
8.3
9.0
10.0
11.0
Table of Contents
Title Page
Non–Operating ...............................................................................................................................16
OPTICAL SPECIFICATIONS .........................................................................................................16
Optical Characteristics ..................................................................................................................16
Viewing Angle Adjustment..............................................................................................................16
FIBER OPTIC BACKLIGHT ...........................................................................................................16
FO Backlight Description ...............................................................................................................16
Lamps Characteristics...................................................................................................................16
Standard Operation........................................................................................................................16
INSTALLATION NOTE ...................................................................................................................16
ACCESSORIES.............................................................................................................................16
OUTLINE AND INSTALLATION CHARACTERISTICS ..................................................................16
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Figure
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
List of Figures
Title Page
Module Block Diagram .....................................................................................................................6
LCD Controller Block Diagram ........................................................................................................7
Correspondence Between Character Codes and Character Patterns ...........................................8
Relationship Between CG RAM Address, Character Codes (DD RAM) and Character Patterns
(CG RAM Data) ................................................................................................................................9
8–bit Serial Data Format ................................................................................................................10
Default Configuration at Power–up ................................................................................................11
Instruction Sequence .....................................................................................................................11
Data Sequence ..............................................................................................................................11
Instruction Set ................................................................................................................................12
Down–loadable Special Characters ..............................................................................................15
Power Supply Requirements .........................................................................................................16
External Reset Circuit ....................................................................................................................16
Definition of Vertical Viewing Angle ................................................................................................16
Definition of Horizontal Viewing Angle............................................................................................16
Definition of Contrast Ratio (CR) ...................................................................................................16
Definition of Optical Response ......................................................................................................16
Typical Lamp Characteristics ........................................................................................................16
03875–06–0214 Outline Drawing...................................................................................................16
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1.0
GENERAL INFORMAT ION
1.1
Introduction
This specification describes the serial interface Daystar Nova model 03875–06–0214, a 4–line supertwisted liquid crystal display (LCD) with 20 characters per line.
Model Number Designation System
03875
Transflective STN
LCD w/FO Backlight
– 06
4x20 Format
* Parallel standard, Serial optional
– 0
Reserved
2
1 = Parallel Data Input *
2 = Serial Data Input
1
1 = 5 V
DC
4
4 = White
1.2
Application
Daystar Nova modules provide alphanumeric information which is easily readable in high ambient light or in darkness with backlight activated. 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.
The serial data input model of the 03875–06 Daystar Nova display allows communication between a host processor and the display by means of a serial RS–232C interface. This provides the capability to communicate over a longer distance than is possible with the parallel model. The RS–232 interface is a two wire communication link.
1.3
Standard Features
•
Serial data communication via RS–232C
•
Multiple baud rates: 1200, 2400, 4800, and 9600
•
Low power consumption
•
Wide temperature range
•
Built–in diagnostics
•
Down–loadable special characters
1.4
Description
The serial input Daystar Nova module includes an on–board CMOS microprocessor which translates serial data into parallel data and provides other enhancements over the parallel model. The serial data may be set by a jumper to accommodate speeds of 1200, 2400, 4800, and 9600 baud. Parity may also be set by jumper for odd, even, or no parity. The electrical interface is RS–232C compatible.
A single +5 Volt nominal power supply is required for operation. The unit operates from 4.50 Volts to 5.50 Volts.
The typical power requirement for the module is 120mW.
The module weighs 9.1 ounces (257.7 grams).
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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 (V
BIAS
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 V
BIAS
test point is used at the factory to preset the viewing angle.
Column Drivers
LCD
Controller
LCD
Cell
Reset
Test
GND
+5V
V
BIAS
TP
V
BIAS
Adj
R
X
R
X
Rtn
Optional
Backlight
–
+
3
5
8
7
6
4
1
2
10
11
Microprocessor Column Drivers
Temperature
Compensation
+5V
Serial
Receiver
Figure 1
View Angle
Adjust
Fiber Optic Backlight
8” Flying Leads
Module Block Diagram
2.1.1
Signal Description
Signal Name
RESET
TEST
V
BIAS
TP
V
BIAS
Adj.
R
X
R
X
Rtn
V
CC
GND
Number Of Lines
1
1
2
7
1
1
1
1
Input/Output
I
I
–
–
I
I
O
I
Connected
MPU
MPU
Temp. Comp. Ckt.
Temp. Comp. Ckt.
Serial Receiver
Serial Receiver
Power
–
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2.2
LCD Controller
The LCD Controller includes all of the circuitry necessary to take parallel input data and create the necessary control functions and characters. The block diagram of the controller is shown in Figure 2 below. The remaining subparagraphs of Section 2 describe the major function blocks.
Address
Counter (AC)
Timing Generation
Circuit
7
3
CL1
CL2
M
7
RS
R/W
E
DB4–DB7
DB0–DB3
4
4
8
8
7
8
Busy
Flag
8
Character
Generator
RAM
(CG RAM)
512 Bits
5
Display Data
RAM
(DD RAM)
80x8 bits
8
Character
Generator
ROM
(CG ROM)
7200 Bits
5
Parallel/Serial Data
Conversion Circuit
(Parallel Data –Serial Data)
16
40–bit Shift Register
16
Com1–Com16
40
Seg1–Seg40
D
Figure 2
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
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LCD Controller Block Diagram
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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 characters are illustrated in Figure 3.
Figure 3 Correspondence Between Character Codes and Character Patterns
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Note: Addresses 00h through 0Fh are reserved for CG RAM Addressing. Addresses 10h through 1Fh and
80h through 9Fh are not used.
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)
7 6 5 4 3 2 1 0
←
Higher Order Bits
Lower Order Bits
→
0 0 0 0
*
0 0 0
CG RAM
Address
5 4 3 2 1 0
←
Higher Order Bits
Lower Order Bits
→
0 0 0
0 0 1
0 1 0
0 0 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
Character Patterns
(CG RAM Data)
7 6 5 4 3 2 1 0
←
Higher Order Bits
Lower Order Bits
→
* * *
1 1 1 1 0
1 0 0 0 1
1 0 0 0 1
1 1 1 1 0
* * *
1 0 1 0 0
1 0 0 1 0
1 0 0 0 1
0 0 0 0 0
Character
Pattern
Example
←
Cursor
Figure 4 Relationship 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.
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3.0
THEORY OF OPERAT ION
The serial input option was designed to allow users to send data and control codes to the display module via the industry standard RS–232C serial interface. This follows the interface protocol of the parallel input Daystar
Nova display modules with few exceptions.
3.1
Serial Interface
The serial input module is a receive only device. Consequently, it is impossible for the host to read data or status from the LCD controller. This precludes reading of data from the Data Display (DD) RAM, Character
Generator (CG) RAM, or address counter (AC). It is not necessary to read the controller busy flag because a large serial data input buffer prevents overflow at 9600 baud.
The serial interface requires one start bit, and may be jumper selected to operate with (1) either 7 or 8 data bits per character and (2) either odd or even parity with one stop bit, or no parity and two stop bits.
Since two command characters and numerous data characters are 8 bits in length, it is recommended to operate in 8 bit mode if the host has this capability. Where this is not possible, 7 bit mode should be jumper selected (see section 4.2) and a special command character (19h) must be sent prior to each 8 bit command or data character; i.e., characters where B
7
= 1.
Figure 5 represents serial data formatted as one start bit, eight data bits, an odd or even parity with one stop bit, or 2 stop bits if no parity.
Mark
Space
(LSB) (MSB)
B B B B B
0 1 2 3 4
B
5
B B
6 7
P S
Start Bit 8 Data Bits
Figure 5 8–bit Serial Data Format
A logic "1" represents a "mark" condition and a logic "0" represents a "space" condition. For RS–232C the
"mark" and "space" conditions are defined as –3.0 to –25.0 Volts and +3.0 to +25.0 Volts, respectively.
3.2
Error Detection and Reporting
During normal operation, the module will detect and display all parity and framing errors (see Section 3.8).
Each character received in error is replaced with one of the following symbols:
Parity Error "&"
Framing Error "@"
If the display shows an "@" after power–up, the polarity of the serial interface may be reversed and should be checked.
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3.3
Power–up Sequence
Upon power–up, the serial Daystar Nova display module is automatically initialized to the format defined by the jumper settings and default values shown in Figure 6. The power–up sequence takes about 0.5 second.
Baud rate:
Parity bit present:
Parity checking enable:
Parity (Odd or Even):
7 or 8 data bits
Multiplex rate of LCD:
Display clear:
Display ON/OFF:
Cursor location:
Cursor:
Entry mode set:
Controller:
Data/Instructions:
Jumper defined (per section 4.2)
"
"
"
"
"
YES
ON
Position 0
OFF
Shift cursor right after character entry
1
Data
Figure 6 Default Configuration at Power–up
3.4
Transmission Sequence for Instructions
Figures 7 and 8 depict the recommended sequence for each data or instruction transmission.
11h
Byte 1 2
Figure 7
3 4
Instruction Sequence n
Byte
12h
1 2
Figure 8
3 4
Data Sequence n
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3.5
Instruction Set
Instruction
Clear Display
Return Home
Entry Mode Set
Display ON/OFF
Control
Cursor or Display
Shift
Function Set
DB
7
DB
6
DB
5
Code
DB
4
DB
3
DB
2
DB
1
DB
0
0 0 0 0 0 0 0
0 0 0 0 0 0 1
Description
1 Clears entire display and sets DD RAM to 0
*
Sets DD RAN counter to 0. If the display has been shifted, characters are returned to their initial positions. DD RAM contents remain unchanged.
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
DL
0
1
S/C
1
1
D
R/L
0
I/D
C
*
*
S
B
*
*
Sets shift register direction and cursor movement direction which occur during data read and write operations
Turns ON/OFF the entire display (D), cursor) and cursor blink attribute (B).
Moves cursor or shifts entire display one position.
DD RAM contents are unchanged.
Sets Interface Data Length.
Set CG RAM
Address
Set DD RAM
Address
Read Busy Flag and Address
Write Data to CG or DD RAM
0
1
BF
1 Sets CG RAM address. CG RAM data is sent or received after this is set.
Sets DD RAM address. DD RAM data is sent or received after this is set.
Reads Busy Flag (BF) and Address Counter
Writes data into CG RAM or DD RAM.
Read Data from
CG or DD RAM
Controller 1
Instructions
Controller 1
Data
Controller 2
Data
Controller 2
Instructions
8 Bit Data
Instructions
Down Load
Special Character
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
0
0
0
1
1
0
1
0
1
1
0
0
1
1
0
0
1
Reads data from CG RAM or DD RAM.
Subsequent data is Display Module Instructions for controller 1.
Subsequent data is Display Module data for controller 1.
Subsequent data is Display Module data for controller 2.
1 Subsequent data is Display Module Instructions for controller 2.
1 Causes microprocessor to add B
7
=1 to the next character received.
Subsequent 2 characters define ROM address of characters, and its down load DD Ram address
Execution
Time (Max)
1.64 ms
1.64 ms
40
40
40
40
40
40
0
40
40
µ
µ
µ
µ
µ
µ
µ
µ
µ s s s s s s s s s
I/D=1:
I/D=0:
S=1:
S/C=1:
S/C=0:
R/L=1:
R/L=0:
DL=1:
Increment
Decrement
Enable Shift Operation
Shift Display
Shift Cursor
Shift Right
Shift Left
8–bit operation
DD RAM:
CG RAM:
A
CG
A
DD
AC
*
Display Data RAM
Character Generator RAM
CG RAM Address
DD RAM Address
(Corresponds to cursor address)
Address Counter
(used for both CG and DD RAM)
Don’t Care
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DL=0:
BF=1:
BF=0:
4–bit operation
Operating internally
Can accept instruction
Figure 9 Instruction Set
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3.5.1
Instruction Summary
Hex Code
08h
0Ch
0Eh
0Fh
10h
14h
18h
1Ch
01h
02h
04h
05h
06h
07h
11h
12h
15h
16h
17h
19h
Command
Clear Display
Home Cursor
Disable Shift And Decrement
Enable Shift And Decrement
Disable Shift And Increment
Enable Shift And Increment
Turn Display Off
Turn Display On And Cursor Off
Turn Display On And Cursor On
Turn Display On And Blink Cursor
Shift Cursor To The Left
Shift Cursor To The Right
Shift Display To The Left
Shift Display To The Right
Subsequent Data Is Controller 1 Instruction(S)
Subsequent Data Is Controller 1 Display Data
Subsequent Data Is Controller 2 Instruction(S)
Subsequent Data Is Controller 2 Display Data
Subsequent Data Down Loads Special Characters
Subsequent Data Is 8 Bit Length Character
3.5.2
Sample Instructions In BASIC
The following instructions are provided as an example to illustrate the correct form and to assist the user to rapidly see his display operate.
10 CLOSE #1
20 OPEN "COM1:9600,N,8,2,CS,DS" AS #1
30 PRINT #1, CHR$(&H4A); CHR$(&H61); CHR$(&H6E)
40 PRINT #1, CHR$(&H2D); CHR$(&H32); CHR$(&H2D)
50 PRINT #1, CHR$(&H39); CHR$(&H36)
60 PRINT #1, CHR$(&H11); CHR$(&H0F)
70 PRINT #1, CHR$(&H84)
80 PRINT #1, CHR$(&H12)
90 SYSTEM
The display should appear as follows:
‘Close if open
'Setup serial port
'Display date
'Blink cursor
'Move cursor to day
'Prepare to change day
Jan–2–96
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3.6
Down–Loadable Special Characters
An added feature of the serial input module is the inclusion of a group of 206 special characters stored in its memory. These supplement the character library of the LCD module and may be easily down loaded (up to eight at a time) into the CG RAM of the display module for use in one display frame of the display. Thus, in addition to being able to input his own character designs as described in section 4.4, the user has these additional preformatted characters available. Note that all down loaded character data is lost and must be reloaded after power has been removed.
To facilitate the use of these characters, a "subsequent data" instruction (17h) is used to inform the microprocessor that the following two bytes of data identify (1) the location of the special character to be down loaded, and (2) the CG RAM location where it is to be loaded. This instruction sequence is as follows.
17h
(1)
Character
Locations
00h – E5h
(2)
CG RAM
Locations
00h – 07h
Figure 10 defines the format of these special characters and their memory location used to select them. The eight CG RAM locations to which they may be sent are from 00h to 07h.
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Figure 10 Down–loadable Special Characters
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3.7
Self–test
The serial input display module can be operated independently from the host by using the "Self–test" option.
1. Check the multiplex jumper for proper setting (Section 4.2).
2. Connect a +5V power supply and potentiometer as discussed in Paragraph 2.1 and Figure 1.
3. Momentarily short the self–test line to GND (P2 pin 5 to pin 8).
4. All character positions should display the character "H".
5. The module can be stepped through the remaining test display frames by using the self–test line as in Step 3 (above). The display will advance from frame to frame each time the self–test line is momentarily shorted to ground. The remaining frames display: I, #, all pixels on, jumper settings in
HEX (with jumper #8 being the LSB, see Section 4.2), firmware version number, and then resumption of normal operation.
6. Upon completion of "Self–test", the module is returned to the normal mode of operation with its previous controller and data/instruction (RS bit) settings.
3.8
Diagnostics
1. The display module can be operated by the host in a HEX dump mode. This diagnostic mode provides for the HEX display of all serial data received. While operating in this mode, the module will ignore the multiplex jumper setting and operate the display in a 1/8 multiplex mode.
2. Check the module jumpers for proper baud speed and parity settings (Section 4.2).
3. With power "OFF" short the self–test line to GND (P2 pin 5 to pin 8).
4. While the self–test line is shorted to ground, apply +5 Volts to the display module. The self–test line is now ineffective and may be allowed to float.
5. All serial data received will now be displayed in HEX. To return to the normal operating mode, remove power, allow the self–test line to float, and re–apply power.
If a parity or framing error should occur, the most significant nibble of the HEX code will be displayed as:
HEX Code
0X
1X
2X
3X
4X
5X
6X
7X
8X
9X
AX
BX
CX
DX
EX
FX
Parity Error
GX
HX
IX
JX
KX
LX
MX
NX
OX
PX
QX
RX
SX
TX
UX
VX
Framing Error gX hX iX jX kX lX mX nX oX pX qX rX sX tX uX vX
X = Least significant nibble
* Characters with parity and framing errors are displayed as framing errors only. Framing errors can occur due to loss of serial bit timing, improper baud rate and/or parity setting.
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4.0
INTERFACE AND CONTROL
4.1
Connector Assignment (P2)
*
**
***
♦
Pin No.
Function
P2–1 R
X
Data
P2–2 R
X
Data RTN (Signal Ground)
P2–3 RESET
P2–4 Adjust
P2–5 Self–Test
P2–6 V
BIAS
(Factory Test Point)
P2–7 V
CC
(+5 Volts)
P2–8 V
SS
(Ground)
P2–9 No Connection
P2–10 Optional Backlight
P2–11 Optional Backlight
4.2
Jumper Settings
NOTE: The mating connector must be wired in a reverse pin sequence from its marking. (Pin
11 is Pin 1 etc.)
The mating connector is a Molex
#22-01-2117 or equivalent. It uses crimp pins #08-50-0114.
Jumper No.
Pins Jumper A = “0” Jumper B = “1”
1
2
3
E1
E2
E3
4800 Baud
2 x Baud
Parity
1200 Baud
1 x Baud
No Parity
♦
4
5
6
7**
8**
E4
E5
E6
Even Parity
7 Data Bits ***
1/8 Mpx (N/A)
Not Used
1/16 Mpx
Not Used
Odd Parity
8 Data Bits
Baud rate will default to "1" if no jumper is installed.
Jumper options 7, and 8 are omitted and will indicate as logic "1" when in self–test mode.
8 bit word preferred. When 7 bit word is selected see section 3.1.2 for use of instruction 19 Hex.
Selection of NO PARITY requires use of two stop bits.
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5.0
ELECTRICAL SPECIFICATIONS
5.1
Absolute Maximum Ratings
Power Supply Voltage (V
CC
):
Serial Input Voltage:
5.2
Normal Operating Ratings
–0.3 to +6.5 V
DC
–25.0 to +25.0 V
DC
Power Supply Voltage (V
CC
)
Supply Current (V
CC
= 5 V
DC
)
Backlight Current (+5 V
DC
)
+5.0 Volts ±10%
34 mA Max
900 mA
5.2.1
Power–up Supply Requirements
Initialization may or may not be performed completely unless the rise time (t
RCC
) of the power supply is correct at turn–on (1ms < t
RCC
< 10ms). Figure 11 represents the requirements of the power supply. Note that t
OFF stipulates the minimum time that power can be OFF (t
OFF
> 1ms) during a momentary dip or when the power supply cycles ON and OFF.
4.5V
V
CC
0.2V
t
RCC t
OFF
Figure 11 Power Supply Requirements
5.2.2
External Reset Requirements
To utilize the optional external reset, the RESET pin must be held at ground (<0.5 Volts) for at least 10 milliseconds after the power supply is within the voltage tolerance. Figure 12 shows the module Reset circuit.
+5V
1k
1uF
J2–Pin 3
3.3k
330
Internal
Pull–down
Microprocessor
Figure 12 External Reset Circuit
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5.3
Interface Signals
5.3.1
Serial Interface Signals
The display is designed to be operated by a standard RS–232 serial interface. The user can operate the module with any interface which meets the following requirements for a "mark" condition and a "space" condition. The user should observe generally accepted design rules when interfacing to the display.
Space Voltage
(V
RX
Data – V
RX
Data RTN) +3.0 to +25.0 Volts
Mark Voltage
(V
RX
Data – V
RX
Data RTN) –25.0 to +0.8 Volts
6.0
ENVIRONMENTAL CHARACTERISTICS
6.1
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:
Shock:
6.2
Non–Operating
10g at 10 to 400Hz (3 axes)
10g (all axes)
Temperature: –40°C to +85°C
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7.0
OPTICAL SPECIFICATIONS
7.1
Optical Characteristics
Format:
Character Font:
Character Height w/ cursor:
Character Height w/o cursor:
Character Width:
Overall Active Area:
Peak Vertical Viewing Angle:
Viewing Mode:
Four lines of 20 characters
5x7 dot matrix with cursor
0.48" (12.1mm)
0.39" (9.9mm)
0.24" (6.1mm)
5.70" x 2.34" (144.9mm x 59.5mm)
20° below normal plane
Transflective, light field
Item
Viewing Angle–Vertical
Viewing Angle–Horizontal*
Contrast ratio (Peak)**
Response time (ON)**
Response time (OFF)**
Symbol
φ
1–
T t t f r
φ
CR
2
* Measured at peak vertical angle,
φ
= –20°
** Measured at peak viewing angles:
φ
= +90º
+Y
φ
1
Normal
Condition Min Typ Max Unit
CR=2.0,
θ
=0° 100 120 – deg.
CR=2.0
25°C
25°C
±45
10
–
±55
18
100
–
–
150 deg.
– mS
–30°C
25°C
–30°C
–
–
–
2000
150
4000
–
200
– mS mS mS
φ
2
–X +X
Figure 13
φ
= –90º
–Y
Definition of Vertical Viewing Angle
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7.1
Optical Characteristics (Continued)
Definition of Horizontal Viewing Angle–top Viewing Display (for Bottom Viewing Displays
φ
= –20°
Typically)
Normal
φ
= +20º
–
θ
+Y
+
θ
–X
θ
= –90º
+X
θ
= +90º
Figure 14
–Y
Definition of Horizontal Viewing Angle
Display contrast ratio is given by:
CR
=
B
2
B
1
Where: B
1
= Brightness of selected segment
B
2
= Brightness of non–selected segment
Brightness Curve for Selected Segment
B
2
Brightness Curve for Non–selected Segment
B
1
Figure 15
Setpoint Driving Voltage
Definition of Contrast Ratio (CR)
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7.1
Optical Characteristics (Continued)
Definition of optical response.
10% ON
90% ON t d t r t d tt f
Excitation
Figure 16 Definition of Optical Response
7.2
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 V
CC
(pin #7) and V
BIAS
(pin #6).
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 7 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.
8.0
FIBER OPTIC BACKLIGHT
8.1
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 18). 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.
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8.2
Lamps Characteristics
The standard light source is a 4.85 Watt, 5.0 Volt halogen lamp. Figure 17 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
* 4.5 Watts
2.5 Watts
1.5 Watts
* Standard
Rated
Voltage
5.0 Volts
5.0 Volts
12.0 Volts
Relative
Brightness
1.0
0.4
0.4
Rated
Life (R
L
)
Lamp
Type
15k Hours Halogen
5k Hours Gas
15k Hours Incandescent
Figure 17 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 (L
A
) is very sensitive to applied voltage (V
A
) as expressed by the following equation where V
R
is the rated design voltage.
L
A
= (R
L
) (V
R
/V
A
)
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
8.3
Standard Operation
Lamp Color Temperature: 2900 – 3100 K
Display Luminance: 3.0 – 4.5 ft–L
Luminance Uniformity: AVG 30%
Operating Temperature:
Storage Temperature:
–30 to +80 C
–40 to +85 C
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9.0
INSTALLATION NOTE
To protect the front polarizer from accidental damage it is highly recommended that the LCD be mounted behind a clear glass or polycarbonate window material. It is also recommended that an air gap of at least .030" to .050" minimum be provided between the window material and the surface of the LCD to prevent the transfer of static charges to the front surface of the LCD. Supertwist LCD’s may activate un–driven elements in response to a surface static charge on the front polarizer. It may take several minutes for such a surface static charge to dissipate.
10.0
ACCESSORIES
Part
Power/Data Connector, 11 Pin (Molex):
Connector Pins, (Molex, 11 required)
Remote Display Cable
Mfr. Part No.
IEE Part No.
22–01–2117 45125–11
08–50–0114 45126–01
34868–XX
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11.0
OUTLINE AND INSTALLATION CHARACTERISTICS
Figure 18 03875–06–0214 Outline Drawing
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