RTscan RT207 Quick setup guide

RT207 Integration Guide
Integration Guide
RT207
OEM 2D Barcode Scanner Engine
Integration Guide
Revision History
Version
Description
Date
V1.0.0
Initial release.
August 14, 2015

RT207 Integration Guide
Table of Contents
Chapter 1 Introduction...................................................................................................................................................... 1
Overview............................................................................................................................................................................ 1
Illumination....................................................................................................................................................................... 1
Aimer.................................................................................................................................................................................. 1
Chapter 2 Installation.........................................................................................................................................................2
General Requirements...................................................................................................................................................... 2
ESD................................................................................................................................................................................. 2
Dust and Dirt................................................................................................................................................................. 2
Ambient Environment..................................................................................................................................................2
Thermal Considerations.............................................................................................................................................. 2
Installation Orientation................................................................................................................................................3
Optics..................................................................................................................................................................................4
Window Placement...................................................................................................................................................... 4
Window Material and Color........................................................................................................................................ 4
Scratch Resistance and Coating...................................................................................................................................5
Window Size..................................................................................................................................................................5
Ambient Light............................................................................................................................................................... 7
Eye Safety...................................................................................................................................................................... 7
Mounting............................................................................................................................................................................ 8
Front View (unit: mm)................................................................................................................................................. 8
Side View (unit: mm)................................................................................................................................................... 8
Top View (unit: mm).................................................................................................................................................... 9
Chapter 3 Electrical Specifications................................................................................................................................10
Power Supply.................................................................................................................................................................. 10
Ripple Noise................................................................................................................................................................ 10
DC Characteristics...........................................................................................................................................................11
Operating Voltage.......................................................................................................................................................11

RT207 Integration Guide
Operating Current...................................................................................................................................................... 11
Chapter 4 Interfaces......................................................................................................................................................... 12
Host Interface Connector............................................................................................................................................... 12
Dimensions of the Host Interface Connector (unit: mm)....................................................................................... 13
Flat Flexible Cable (unit: mm)...................................................................................................................................14
Communication Interfaces............................................................................................................................................. 15
Control Interfaces........................................................................................................................................................... 16
Reset............................................................................................................................................................................ 16
Trigger......................................................................................................................................................................... 16
Beeper......................................................................................................................................................................... 17
Good Read LED........................................................................................................................................................... 18
Chapter 5 Development Tools........................................................................................................................................19
EVK................................................................................................................................................................................... 19

Integration Guide
RT207 Integration Guide
Chapter 1 Introduction
Overview
TM
The RT207 is outstanding for ultra small design, low power consumption, good performance for even poor
printed 1D/ 2D bar codes and for on-screen bar codes even if the screen is covered with protective film or the
screen with low brightness level, with TTL232 interface.
Its specially suitable for devices with small space inside, for example: POS, PDA, or other kinds of portable
device, but of course, can be used for big devices such as kiosk terminals.
Illumination
The RT207 has two red LEDs for supplementary lighting, making it possible to scan bar codes even in
complete darkness. The illumination can be programmed On or Off.
The RT207 uses red LEDs for illumination, so the engine shows better reading performance on bar codes
printed in non-red colors. For applications involving red bar codes, it is advised to turn off the engine’s
illumination and use non-red supplementary lighting (such as green) instead. The user can conduct some
tests to determine the proper wavelengths to be used.
Aimer
The RT207 has a view finder that produces a solid circle-shaped aiming pattern to help the user to easily
position the target bar code within the engine’s field of view to increase scan efficiency. The aiming pattern
can be turned On or Off. It is advisable to turn it on when scanning bar codes.

Integration Guide
RT207 Integration Guide
Chapter 2 Installation
General Requirements
ESD
ESD protection has been taken into account when designing the RT207 and the engine is shipped in ESD safe
packaging. Always exercise care when handling the engine outside its package. Be sure grounding wrist
straps and properly grounded work areas are used.
Dust and Dirt
The RT207 must be sufficiently enclosed to prevent dust particles from gathering on the lens and circuit
board. Dust and other external contaminants will eventually degrade the engine’s performance.
Ambient Environment
The following environmental requirements should be met to ensure good performance of the RT207:
Operating Temperature
-20℃~ 60℃
Storage Temperature
-40℃~ 80℃
Humidity
5% ~ 95% (non-condensing)
Thermal Considerations
Electronic components in the RT207 will generate heat during the course of their operation. Operating the
RT207 in continuous mode for an extended period may cause temperatures to rise on CIS and decoder chip.
Overheating can degrade image quality and affect scanning performance. Given that, the following
precautions should be taken into consideration when integrating the RT207.
Reserve sufficient space for good air circulation in the design.
Avoid wrapping the RT207 with thermal insulation materials such as rubber.

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RT207 Integration Guide
Installation Orientation
There are two threaded mounting holes in the bottom of the RT207 for fastening the engine to a mounthing
surface with machine screws. The following figure illustrates a front view of the RT207 after correct
installation.

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RT207 Integration Guide
Optics
Window Placement
The window should be positioned properly to let the illumination and aiming beams pass through as much as
possible and no reflections back into the engine (reflections can degrade the reading performance).
The window should be mounted close to the front of the engine (parallel). The maximum distance is
measured from the front of the engine housing to the furthest surface of the window. In order to reach better
reading performance, the distance from the front of the engine housing to the furthest surface of the window
should not exceed 3mm and the distance from the front of the engine housing to the nearest surface of the
window should not exceed 2mm.
If the window is required to be in a tilted position, the above distance requirements should be met and tilt
angle should ensure no reflections back into the lens.
Window Material and Color
CIS’s responsiveness (mainly to wavelengths of red light）should be taken into consideration when choosing
window material and color, in order to achieve the possible highest spectral transmission, lowest haze level
and homogeneous refractive index. It is suggested to use PMMA or optical glass with spectral transmittance
of red light over 90% and haze less than 1%. Whether to use an anti-reflection coating or not depends on the
material and application needs.
≤3mm
≤2mm

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RT207 Integration Guide
Scratch Resistance and Coating
Scratch on the window can greatly reduce the performance of the RT207. It is suggested to use abrasion
resistant window material or coating.
Window Size
The window must not block the field of view and should be sized to accommodate the aiming and
illumination envelopes shown below.
Horizontal:
Aiming Envelope 3°
FOV Envelope 44°
Illumination Envelope 50°

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RT207 Integration Guide
Vertical:
Aiming Envelope 3°
Illumination Envelope 50°
FOV Envelope 33.2°

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RT207 Integration Guide
Ambient Light
The RT207 shows better performance with ambient light and it is well able to handle the flicker in
fluorescent lights using 50-60Hz AC power. However, high-frequency pulsed light can result in performance
degradation.
Eye Safety
The RT207 has no lasers. It uses red LEDs to create illumination and aiming beams. The LEDs are bright, but
testing has been done to demonstrate that the engine is safe for its intended application under normal usage
conditions. However, the user should avoid looking into the beam.

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RT207 Integration Guide
Mounting
The illustrations below show the mechanical mounting dimensions for the RT207. The structural design
should leave some space between components.
Front View (unit: mm)
Side View (unit: mm)

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RT207 Integration Guide
Top View (unit: mm)
Mounting Hole M1.6 2.0mm

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RT207 Integration Guide
Chapter 3 Electrical Specifications
Power Supply
Do not power up the RT207 until it is properly connected. Be sure the power is cut off before connecting a
flexible cable to or disconnecting a flexible cable from the host interface connector. Hot-plugging could
damage the engine.
Unstable power supply or sharp voltage drops or unreasonably short interval between power-ons may lead
to unstable performance of the engine. Do not resupply the power immediately after cutting it off. The
minimum interval must exceed 2 seconds.
Ripple Noise
Image sensor and decoder chip are directly fed by the input power of RT207. To ensure the image quality, a
power supply with low ripple noise is needed.
Acceptable ripple range (peak-to-peak) : ≤50mV (≤30mV recommended).

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RT207 Integration Guide
DC Characteristics
Operating Voltage
Ta=25℃
Parameter
Description
Minimum
Typical
Maximum
Unit
VDD
Voltage Drain Drain
3.0
3.3
3.6
V
VIH
High Level Input Voltage
VCC-0.5
-
-
V
VIL
Low Level Input Voltage
-
-
0.5
V
VOH
High Level Output
Voltage
VCC-0.3
-
-
V
VOL
Low Level Output Voltage
-
-
0.3
V
Operating Current
Ta=25℃，VDD=3.3V
Operating Current
Standby Current
Sleep Current
210mA
7mA
<5uA

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RT207 Integration Guide
Chapter 4 Interfaces
Host Interface Connector
The following table lists the pin functions of the 12-pin host interface connector.
PIN#
Signal Name
I/O
Function
1
NC
-
Not connected.
2
VDD
-
3.3V power supply.
3
GND
-
Power-supply ground.
4
RX
I
TTL level 232 receive data.
5
TX
O
TTL level 232 transmit data.
6
USB_D-
I/O
USB D- differential data signal.
7
USB_D+
I/O
USB D+ differential data signal.
8
NC
-
Not connected.
9
Buzz
O
Beeper output. For the information of external beeper driver circuit,
see the Beeper section in this chapter.
10
LED
O
Good Read LED output. For the information of LED driver circuit, see
the Good Read LED section.
11
Reset
I
Reset signal input: Driving this pin low for 100us-500us resets the
engine.
12
nTrig
I
Trigger signal input: Driving this pin low for at least 10ms causes the
RT207 to start a scan and decode session.

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RT207 Integration Guide
Dimensions of the Host Interface Connector (unit: mm)
The RT207 uses a 12-pin FPC ZIF socket (bottom contact, model: 10051922-1210EHLF) manufactured by FCI.
The socket can be connected to a host device with a flat flexible cable.

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RT207 Integration Guide
Flat Flexible Cable (unit: mm)
A 12-pin flat flexible cable can be used to connect the RT207 to a host device. The cable design must be
consistent with the specifications shown below. Use reinforcement material for the connectors on the cable
and reduce cable impedance for reliable connection and stable performance.

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RT207 Integration Guide
Communication Interfaces
The RT207 can communicate with the host device via its TTL-232 interface. This interface is applicable to
most system architectures. For those requiring RS-232, a TTL-232 to RS-232 conversion circuit is needed.
The RT207’s TTL-232 interface supports baud rates from 1200bps to 115200bps; it does not support
hardware flow control. Its default settings are 9600bps, 8 data bits, no parity check and1 stop bit.
Besides, if use simulation kit board together(optional), the RT207 can also communicate with the host
device via its USB interface.
1. USB HID-KBW: Based on USB connection, the RT207’s transmission is simulated as USB keyboard input.
It works on a Plug and Play basis and no driver is required.
2. USB COM Port Emulation: The USB interface on the host device is emulated as a serial port with the
same data transmission and configuration as a real serial port. A driver is required.

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RT207 Integration Guide
Control Interfaces
Reset
Driving the Reset pin (PIN 11) on the host interface connector low for 100us-500us can reset the RT207.
However, do not reset the engine at unreasonably short intervals. The minimum interval between resets
must exceed 2 seconds.
Trigger
Driving the nTrig pin (PIN 12) on the host interface connector low for over 10ms causes the RT207 to start a
scan and decode session. If barcode is decoded, the RT207 waits for the voltage at the nTrig pin to turn high
(or the trigger to be released) after sending the data to the Host. If the trigger is released during a scan
attempt, the RT207 immediately stops decoding.
Next decode session does not happen until the RT207 receives active trigger signal (driving the nTrig pin low)
again.
As a decode session involves image capture, barcode decoding and other steps, it is suggested that the
minimum interval between triggers should exceed 50ms.
The following trigger circuit is provided for reference.
B3F-4000S1
2 3
1 4
5 6
C3
100pF
CBW1608/60R
L1
C4
100pF
nTrig
R15
10K
VDD

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RT207 Integration Guide
Beeper
The RT207 provides a pin (Buzz, PIN 9) on the host interface connector that provides a PWM output to an
external driver circuit for generating audible feedback to the user to indicate statuses like power up or good
read. The PWM output is not strong enough to drive a beeper, thus a beeper driver circuit is needed.
The following beeper driver circuit is provided for reference.
2N3904
Q8
AS903Q
LS1
1
2
R5
10R
R6 1K
R7
10K
VDD
BUZZ
BAT760
D2