Marson MT780 Quick setup guide

MT780 Linear Image Barcode Scan Engine, Integration Guide, V2.8
M
MT T7 78 80 0
(
(3 3. .3 3V V L Li in ne ea ar r I Im ma ag ge e B Ba ar rc co od de e S Sc ca an n E En ng gi in ne e) )
I
In nt te eg gr ra at ti io on n G Gu ui id de e
Version 2.8DATE: 2021/07/07

MT780 Linear Image Barcode Scan Engine, Integration Guide, V2.8
TABLE OF CONTENTS
1
1. . I IN NT TR RO OD DU UC CT TI IO ON N.........................................................................................1
1-1. MT780 Block Diagram .......................................................................1
1
1- -2 2. . E El le ec ct tr ri ic c I In nt te er rf fa ac ce e................................................................................2
1
1- -2 2- -1 1. . P Pi in n A As ss si ig gn nm me en nt t........................................................................2
1
1- -2 2- -2 2. . E El le ec ct tr ri ic c C Ch ha ar ra ac ct te er ri is st ti ic cs s............................................................4
1
1- -2 2- -3 3. . F Fl le ex x C Ca ab bl le e ...............................................................................4
1
1- -3 3. . O Op pe er ra at ti io on na al l T Ti im mi in ng g ............................................................................5
1
1- -3 3- -1 1. . P Po ow we er r U Up p ................................................................................5
1
1- -3 3- -2 2. . S Sl le ee ep p ( (I Id dl le e) ) M Mo od de e ....................................................................5
1
1- -3 3- -3 3. . D De ec co od de e T Ti im mi in ng g ........................................................................5
1
1- -3 3- -4 4. . S Su um mm ma ar ry y o of f O Op pe er ra at ti io on n T Ti im mi in ng gs s ...............................................6
2
2. . S SP PE EC CI IF FI IC CA AT TI IO ON NS S.......................................................................................7
2
2- -1 1. . I In nt tr ro od du uc ct ti io on n........................................................................................7
2
2- -2 2. . T Te ec ch hn ni ic ca al l S Sp pe ec ci if fi ic ca at ti io on ns s.....................................................................7
2
2- -3 3. . I In nt te er rf fa ac ce e.............................................................................................9
2
2- -3 3- -1 1. . U UA AR RT T I In nt te er rf fa ac ce e........................................................................9
2
2- -3 3- -2 2. . U US SB B I In nt te er rf fa ac ce e........................................................................10
2-4. Operation Method............................................................................10
2
2- -5 5. . S Sc ca an nn ni in ng g R Ra an ng ge e .............................................................................. 11
2
2- -5 5- -1 1. . T Ty yp pi ic ca al l S Sc ca an nn ni in ng g R Ra an ng ge e........................................................ 11
2
2- -5 5- -2 2. . G Gu ua ar ra an nt te ee ed d S Sc ca an nn ni in ng g R Ra an ng ge e................................................12
2-6. Pitch Angle, Roll Angle and Skew Angle ..........................................13
2
2- -7 7. . S Sp pe ec cu ul la ar r D De ea ad d Z Zo on ne e........................................................................14
2
2- -8 8. . C Cu ur rv va at tu ur re e D De eg gr re ee e ............................................................................15
2
2- -9 9. . F Fl le ex x C Ca ab bl le e S Sp pe ec ci if fi ic ca at ti io on n ..................................................................15
2
2- -1 10 0. . C Co on nn ne ec ct to or r S Sp pe ec ci if fi ic ca at ti io on n.................................................................16
3
3. . I IN NS ST TA AL LL LA AT TI IO ON N.........................................................................................17
3
3- -1 1. . E El le ec ct tr ro os st ta at ti ic c D Di is sc ch ha ar rg ge e C Ca au ut ti io on ns s.....................................................17
3
3- -2 2. . M Me ec ch ha an ni ic ca al l D Di im me en ns si io on n.....................................................................17
3-3. Window Materials ............................................................................18
3
3- -4 4. . W Wi in nd do ow w S Sp pe ec ci if fi ic ca at ti io on ns s.....................................................................19
3
3- -5 5. . W Wi in nd do ow w C Ca ar re e ...................................................................................20
4
4. . R RE EG GU UL LA AT TI IO ON NS S.........................................................................................21
5
5. . D DE EV VE EL LO OP PM ME EN NT T K KI IT T.................................................................................22
6
6. . S SL LE EE EP P ( (I ID DL LE E) ) M MO OD DE E................................................................................23
7
7. . P PA AR RA AM ME ET TE ER R S SE ET TU UP P................................................................................24
8
8. . P PA AC CK KA AG GI IN NG G.............................................................................................25
9
9. . V VE ER RS SI IO ON N H HI IS ST TO OR RY Y..................................................................................26

MT780 Linear Image Scan Engine, Integration Guide, V2.8
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1
1. . I IN NT TR RO OD DU UC CT TI IO ON N
The MT780 Linear Image Barcode Scan Engine is designed for 1D barcode reading,
and high performance barcode scanning with optimal performance and easy
integration. MT780 is ideal for integration into data terminals and other small mobile
devices.
The MT780 consists of 2 illumination LEDs, a high-quality linear image sensor and a
microprocessor that contains powerful firmware to control all aspects of operations
and enable communication with the host system over the standard set of
communication interfaces.
Two interfaces, UART & USB, are available. UART interface communicates with the
host system over TTL-level RS232 communication; USB interface emulates a USB
Keyboard device and communicates with the host system over USB.
1
1- -1 1. . M MT T7 78 80 0 B Bl lo oc ck k D Di ia ag gr ra am m

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1
1- -2 2. . E El le ec ct tr ri ic c I In nt te er rf fa ac ce e
1
1- -2 2- -1 1. . P Pi in n A As ss si ig gn nm me en nt t
(Front View) (Back View)
Pin# UART USB I/O Description Schematic Example
1
Power
Down
Power
Down
Output
Power Down Status
High: Scan engine in idle mode
Low: Scan engine in normal operation
2VDD VDD --- Power Supply Operating Voltage: 3.3V ± 5%
*Note: An input voltage with capacitance
value of at least 10μF.
3
GND
GND
---
Ground
4Wake Wake Input Wake Up Active Low: Wake up scan engine
from idle mode
5Buzzer Buzzer Output Beeper output Active High: Power-Up or a
successful barcode decode. PWM
controlled signal can be used to
drive an external buzzer
BZ
1N 4148
1 2
+
10uF
10R
3v 3
220R
2N3904
BZ
BUZZER
2 1
-
+
Pin10
Pin1

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Pin# UART USB I/O Description Schematic Example
6Trigger Trigger Input Trigger input High: Power-up/Standby
Low: Scanning Operation
*Note:
1. Scanning operation continues until a
barcode is successfully decoded or the
trigger is released (pull high). To proceed to
the next scanning operation, release (pull
high) first and press (pull low) the trigger
again.
2. Pull low at power-up will promt the scan
engine into firmware update mode
7
---
USB_DP
Input /
Output
USB Signal D+
Differential Signal Transmission
8
---
USB_DM
Input /
Output
USB Signal D-
Differential Signal Transmission
9RXD --- Input UART TTL data input
Sipex® Vendor P/N: SP232ACT
10 TXD --- Output UART TTL data
output
Sipex® Vendor P/N: SP232ACT

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1
1- -2 2- -2 2. . E El le ec ct tr ri ic c C Ch ha ar ra ac ct te er ri is st ti ic cs s
Symbol
Ratings
Min
Max
Unit
VIH Input high level 2.0 3.6 V
VIL Input low level 0 0.8 V
VOH Output high level 2.9 V
VOL Output low level 0.4 V
VESD(HBM) Electrostatic discharge voltage
(human body model)
±4kV contact direct discharge, ±8kV indirect
discharge. Requires housing that is designed
for ESD protection and stray electric fields.
kV
|
△
VDDx| Variations between different VDD
power pins 50 mV
*Note:
1. Power Supply:VDD=3.3 ± 5%
2. Exposure to maximum rating conditions for extended periods may affect device reliability.
1
1- -2 2- -3 3. . F Fl le ex x C Ca ab bl le e
The flex cable is used to connect MT780 to the host side. There are 10
pins on the MT780 (engine) side and 12 pins on the host side. Please
see 2-10 for more details of flex cable.
Flex cable
(P/N: 6341-0501010)
Pin# Pin Assignment To Host
1 VCC
2 GND
3 RXD
4 TXD
5 USB D+
6 USB D-
7 Power Down
8 Buzzer
9 N/A
10 N/A
11 Trigger
12 Wake
*Note: Conforms to Marson MT700’s pin assignment.

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1
1- -3 3. . O Op pe er ra at ti io on na al l T Ti im mi in ng g
This chapter describes the timing associated with the various operating modes of
the MT780 including Power Up, Sleep Mode, and Decode Timing.
1
1- -3 3- -1 1. . P Po ow we er r U Up p
When power is initially applied, the MT780 is activated and begins the
process of initialization. Once initialization (duration ≦10mS) is completed,
the MT780 emits a power-up beep, enters Standby Mode and is ready for
barcode scanning.
1
1- -3 3- -2 2. . S Sl le ee ep p ( (I Id dl le e) ) M Mo od de e
The MT780 will enter Sleep (Idle) Mode and output a Power Down signal
(Active high) after a programmable time period has elapsed without any
activity. Please see Chapter 6 for more details about Sleep Mode.
1
1- -3 3- -3 3. . D De ec co od de e T Ti im mi in ng g
In Standby Mode, the MT780 is activated by the Trigger signal which MUST
be kept low for at least 20 mS until the successful scan is achieved, as
indicated by the Buzzer signal.
The total scan and decode time is approximately equal to the time from the
Trigger signal going low to the Buzzer signal going high. This time will vary
slightly based on several factors including barcode quality, barcode type
and the distance between MT780 and the barcode scanned. The following
waveforms show a typical condition.
Upon a successful scan, the MT780 outputs the Buzzer signal and keeps
this signal for the duration of the transmission of the data decoded to the
host side. The duration is about 80 mS.
Therefore, the total duration of a typical scanning operation (from Trigger
turning low to the end of Buzzer PWM signal) is approximately 120mS.

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In Sleep Mode, the MT780 can be by the Trigger signal which MUST be
kept low for at least 20 mS until the successful scan is achieved, as
indicated by the Buzzer signal. Wake signal can also be used to wake up
the MT780, which, MUST also be kept low for at least 2 mS, will prompt the
scan engine into Standby Mode.
The total scan and decode time is approximately equal to the time from the
Trigger signal going low to the Buzzer signal going high. This time will vary
slightly based on several factors including barcode quality, barcode type
and the distance between MT780 and the barcode scanned. The following
waveforms show a typical condition.
Upon a successful scan, the MT780 outputs the Buzzer signal and keeps
this signal for the duration of the transmission of the data decoded to the
host side. The duration is about 80 mS.
Therefore, the total duration of a typical scanning operation (from Trigger
turning low to the end of Buzzer PWM signal) is also approximately 120mS.
1
1- -3 3- -4 4. . S Su um mm ma ar ry y o of f O Op pe er ra at ti io on n T Ti im mi in ng gs s
The maximum duration of initialization is 10mS.
The maximum duration of scanning operation in Standby Mode is 120mS.
The maximum duration of waking up MT780 from Sleep Mode by
Trigger/Wake signal is about 2 mS.
The maximum duration of waking up MT780 from Sleep Mode by Trigger
signal and completing decode is about 120ms.

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2
2. . S SP PE EC CI IF FI IC CA AT TI IO ON NS S
2
2- -1 1. . I In nt tr ro od du uc ct ti io on n
This chapter provides technical specifications of the MT780 scan engine.
Operating method, scanning range and scan angle are also presented.
2
2- -2 2. . T Te ec ch hn ni ic ca al l S Sp pe ec ci if fi ic ca at ti io on ns s
Optic & Performance
Light Source 625nm visible red LED
Sensor CMOS Linear Sensor
Scan Rate 620 Scans/ sec (Smart Detection)
Resolution 3mil/ 0.075mm
Scan Angle 53°
Print Contrast Ratio 30%
Width of Field 200mm (13Mil Code39)
Typical
Depth Of Field
(Environment: 800 lux)
3 mil Code39 64 ~ 100mm (13 digits)
4 mil Code39 56 ~ 132mm (4 digits)
5 mil Code39 51 ~ 169mm (4 digits)
10 mil Code39 25 ~ 304mm (4 digits)
15 mil Code39 39 ~ 437mm (4 digits)
13 mil UPC/ EAN 30 ~ 338mm (13 digits)
Guaranteed
Depth Of Field
(Environment: 800 lux)
3 mil Code39 N/A
4 mil Code39 70 ~ 120mm (4 digits)
5 mil Code39 70 ~ 150mm (4 digits)
10 mil Code39 35 ~ 280mm (4 digits)
15 mil Code39 45 ~ 410mm (4 digits)
13 mil UPC/ EAN 40 ~ 320mm (13 digits)
Physical Characteristics
Dimension (L)23.7 x (W)12.2 x (H)7.5 mm
Weight 2g
Color Black
Material PC
Connector 10pin (pitch = 0.5mm) ZIF
Cable 10pin to 12pin (pitch = 0.5mm) flex cable

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Electrical
Operation Voltage 3.3VDC±5%
Working Current < 170 mA
Standby Current < 60 mA
Idle Current (Sleep Mode)< 100 uA
Surge Current < 500 mA
Connectivity
Interface UART (TTL-level RS232)
USB (HID Keyboard)
User Environment
Operating Temperature -20°C ~ 60°C
Storage Temperature -20°C ~ 60°C
Humidity 0% ~ 95%RH (Non-condensing)
Drop Durability 1.5M
Ambient Light 100,000 Lux (Sunlight)
Symbologies
UPC-A/ UPC-E
EAN-8/ EAN-13
Matrix 2 of 5
China Postal Code (Toshiba Code)
Industrial 2 of 5
Interleaved 2 of 5
Standard 2 of 5 (IATA Code)
Codabar
Code 11
Code 32
Standard Code 39
Full ASCII Code 39
Code 93
Code 128
EAN/ UCC 128
MSI Plessey Code
UK Plessey Code
Telepen Code
GS1 Databar
Regulatory
ESD Functional after 4KV contact, 8KV a
ir discharge

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(it requires housing that is designed for ESD
protection and stray from electric fields.)
EMC FCC – Part15 Subpart B (Class B)
CE – EN55022, EN55024
Safety Approval IEC 62471 (Exempt Group)
Environmental WEEE, RoHS 2.0
2
2- -3 3. . I In nt te er rf fa ac ce e
MT780 supports both UART and USB output interface.
2
2- -3 3- -1 1. . U UA AR RT T I In nt te er rf fa ac ce e
Below default values of communication parameters apply to both
Standard mode and Command mode firmware.
Baud rate: 9600
Data Bits: 8
Parity: None
Stop Bit: 1
Handshaking: None
Flow Control Timeout: None
ACK/NAK: OFF
BCC: OFF
Characteristics:
(1) Configurable by scanning configuration barcodes from 1D Scan
Engine User’s Manual or by Ez Utility®, a PC-based software utility.
(2) Configurable by serial commands, which are listed in Serial
Commands Manual.
(3) Supports both software & hardware trigger
Interface Configuration Barcode:
UART
Scanning above barcode will set your MT780 to UART interface.

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2
2- -3 3- -2 2. . U US SB B I In nt te er rf fa ac ce e
Characteristics:
(1) Configurable by scanning configuration barcodes from 1D Scan
Engine User’s Manual or by Ez Utility®, a PC-based software utility.
(2) Configurable by serial commands, which are listed in Serial
Commands Manual.
(3) Supports hardware trigger only
(4) Emulates a USB Keyboard device
Interface Configuration Barcode:
USB HID
Scanning above barcode will set your MT780 to USB interface.
2
2- -4 4. . O Op pe er ra at ti io on n M Me et th ho od d
1. At power-up, the MT780 sends the Power-Up (PWM) signals over Buzzer pin
as an indication that the MT780 enters Standby Mode and is ready for
operation.
2. Once the MT780 triggered by either hardware or software method, it will emit
a narrow, horizontal slab of light which is aligned with the sensor’s field of
view.
3. The linear image sensor captures the linear image of barcode and produces
an analog waveform, which is sampled and analyzed by the decoder
firmware running on the MT780.
4. Upon a successful barcode decoded, the MT780 turns off the illumination
LEDs, sends the Good Read (PWM) signals over Buzzer pin and transmits
the decoded data to the host.
5. The MT780 may enter Sleep Mode (Please see Chapter 6 for more details)
after a period of inactivity in order to reduce power consumption.

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2
2- -5 5. . S Sc ca an nn ni in ng g R Ra an ng ge e
2 2- -5 5- -1 1. . T Ty yp pi ic ca al l S Sc ca an nn ni in ng g R Ra an ng ge e
Barcode Length: Code39 – 4 characters
EAN/UPC – 13 characters
Bar & Space Ratio: 1 to 2.5
Print Contrast Ratio: 0.9
Ambient Light: > 800 lux
Minimum & Maximum Scan Distance
Symbology
Resolution
Distance
No. of Encoded Characters
Standard
Code 39
(w/o checksum)
3 Mil 64 ~ 100 mm
4 char.
4 Mil 56 ~ 132 mm
5 Mil 51 ~ 169 mm
10 Mil 25 ~ 304 mm
15 Mil 39 ~ 437 mm
EAN 13 13 Mil 30 ~ 338 mm 13 char.
Maximum Scan Width
Symbology Resolution Barcode Length No. of Encoded Characters
Standard
Code 39
(w/o checksum)
13 Mil 200 mm 37 char.

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2 2- -5 5- -2 2. . G Gu ua ar ra an nt te ee ed d S Sc ca an nn ni in ng g R Ra an ng ge e
Barcode Length: Code39 – 4 characters
EAN/UPC – 13 characters
Bar & Space Ratio: 1 to 2.5
Print Contrast Ratio: 0.9
Ambient Light: > 800 lux
Minimum & Maximum Scan Distance
Symbology
Resolution
Distance
No. of Encoded Characters
Standard
Code 39
(w/o checksum)
3 Mil N/A 13 char.
4 Mil 70 ~ 120 mm
4 char.
5 Mil 70 ~ 150 mm
10 Mil 35 ~ 280 mm
15 Mil 45 ~ 410 mm
EAN 13 13 Mil 40 ~ 320 mm 13 char.
Maximum Scan Width
Symbology Resolution Barcode Length No. of Encoded Characters
Standard
Code 39
(w/o checksum)
13 Mil 200 mm 37 char.

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2
2- -6 6. . P Pi it tc ch h A An ng gl le e, , R Ro ol ll l A An ng gl le e a an nd d S Sk ke ew w A An ng gl le e
Be aware of the tolerance for the pitch, roll and skew angle of barcode you are
trying to scan.
Pitch Angle: ± 65° Roll Angle: ± 50°
Skew Angle: ± 25°

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2
2- -7 7. . S Sp pe ec cu ul la ar r D De ea ad d Z Zo on ne e
Do not place the MT780 directly over the barcode. The light reflecting directly
back into the MT780 from the barcode is known as specular reflection, which can
make decoding difficult. The specular dead zone of MT780 is up to 5° depending on
target distance and substrate glossiness.
Specular Dead Zone: ± 5°

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2
2- -8 8. . C Cu ur rv va at tu ur re e D De eg gr re ee e
The curvature degree of a scanned barcode is specified as below:
2
2- -9 9. . F Fl le ex x C Ca ab bl le e S Sp pe ec ci if fi ic ca at ti io on n
Below is the drawing of the flat cable(P/N: 6341-0501010) that comes with MT780.
Barcode Code 39 (L=32 mm) Code 39 (L=43 mm)
Resolution 13 mil (0.33 mm) 20 mil (0.51 mm)
R R ≧15 mm R ≧20 mm
d 40 mm
PCS 0.9 (printed on photographic paper)

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2
2- -1 10 0. . C Co on nn ne ec ct to or r S Sp pe ec ci if fi ic ca at ti io on n
Marson recommends that a 12-pin 0.5-pitch Molex® FPC Connector (Molex®P/N:
54548-1229), to be installed on Host side.

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3
3. . I IN NS ST TA AL LL LA AT TI IO ON N
The MT780 scan engine is designed specifically for integration into customer's
housing for OEM applications. However, the MT780’s performance will be adversely
affected or permanently damaged when mounted into an unsuitable enclosure.
Warning: The limited warranty is void if the following recommendations are not
adhered to when mounting the MT780.
3
3- -1 1. . E El le ec ct tr ro os st ta at ti ic c D Di is sc ch ha ar rg ge e C Ca au ut ti io on ns s
All MT780s are shipped in ESD protective packaging due to the sensitive nature of
the exposed electrical components.
1. ALWAYS use grounding wrist straps and a grounded work area when
unpacking and handling the MT780.
2. Mount the MT780 in a housing that is designed for ESD protection and stray
electric fields.
3
3- -2 2. . M Me ec ch ha an ni ic ca al l D Di im me en ns si io on n
When securing the MT780 by T1.7x3mm tapping screws:
1. Leave sufficient space to accommodate the maximum size of the MT780.
2. Do not exceed 1.2±0.1kg-cm of torque when securing the MT780 to the host.
3. Use safe ESD practices when handling and mounting the MT780.
Front View Side View
Top View Bottom View

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3
3- -3 3. . W Wi in nd do ow w M Ma at te er ri ia al ls s
Following are descriptions of three popular window materials:
1. Poly-methyl Methacrylic (PMMA)
2. Allyl Diglycol Carbonate (ADC)
3. Chemically tempered float glass
Cell Cast Acrylic (ASTM: PMMA)
Cell cast Acrylic, or Poly-methyl Methacrylic is fabricated by casting acrylic
between two precision sheet of glass. This material has very good optical quality,
but is relatively soft and susceptible to attack by chemicals, mechanical stress
and UV light. It is strongly recommended to have acrylic hard-coated with
Polysiloxane to provide abrasion resistance and protection from environmental
factors. Acrylic can be laser-cut into odd shapes and ultrasonically welded.
Cell Cast ADC, Allyl Diglycol Carbonate (ASTM: ADC)
Also known as CR-39TM, ADC, a thermal setting plastic widely used for plastic
eyeglasses, has excellent chemical and environmental resistance. It also has an
inherently moderate surface hardness and therefore does not require
hard-coating. This material cannot be ultrasonically welded.
Chemically Tempered Float Glass
Glass is a hard material which provides excellent scratch and abrasion
resistance. However, un-annealed glass is brittle. Increased flexibility strength
with minimal optical distortion requires chemical tempering. Glass cannot be
ultrasonically welded and is difficult to cut into odd shapes.
Property Description
Spectral Transmission 85% minimum from 610 to 680 nanometers
Thickness < 1 mm
Coating
Both sides to be anti-reflection coated to provide 1%
maximum reflectivity from 610 to 680 nanometers at
nominal window tilt angle. An anti-reflection coating can
reduce the light that is reflected back to the host case.
Coatings will comply with the hardness adherence
requirements of MIL-M-13508.