AMS AS7265xDemoKit Light Sensor User Guide
AMS AS7265x is a multispectral chipset that enables the creation of advanced color sensing solutions. It features an 18-channel sensor system with 6 spectral filters per device, allowing for precise color measurement and object identification. The chipset can be easily integrated with a microcontroller or computer via UART or I2C interface, making it suitable for various applications, including color matching, quality control, and medical diagnostics.
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User Guide
UG000393
AS7265x Multispectral
Chipset
Evaluation Kit User Guide
Hardware & Software
v1-00
• 2018-Aug-21
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AS7265x Multispectral Chipset
Content Guide
Content Guide
Introduction .................................... 3
Kit Content .................................................... 3
Ordering Information .................................... 4
Getting Started ............................... 5
Hardware Description .................... 6
Hardware Architecture ................................. 6
Sensor Architecture ...................................... 7
Power Supply ............................................... 9
Interface to Controller ................................... 9
LEDs ........................................................... 10
Firmware .................................................... 11
Software Description ................... 12
Operation ................................................... 12
18 Channel Sensor Page ........................... 12
Logging & Control Page ............................. 14
Console Page............................................. 16
FW Update Page ....................................... 17
Schematics, Layers and BOM .... 18
Revision Information ................... 21
Legal Information ........................ 22
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AS7265x Multispectral Chipset
Introduction
1 Introduction
AS7265x Multispectral Chipset Evaluation Kit provides a platform to evaluate
ams
AS7265x
Multispectral Chipset products with the Spectral Sensor Dashboard software running on a Windows personal computer. This user guide describes the features and functions of AS7265x Multispectral
Chipset evaluation kit. Note, this manual includes all details for the sensor hardware, software installation and description based on hardware generation 2Vx and firmware 12Vx or higher. It replaces former
ams
manuals for AS7265x hardware and software, which describes older sensor systems. Do not mix older and newer system components. In case of any updates, check before the details for compatibility in the relevant application notes.
The described kit of the Multispectral Chipset AS7265x includes a sensor hardware release 2Vx
1
and firmware version 11Vx.x and higher. In case of any systems changings or new development, please check the compatibility of firmware and hardware. For more details, see the application note “AS7265x
Design considerations”.
1.1 Kit Content
The following items are delivered with the AS7265x Evaluation Kit. Please ask
ams
sales for accessories like mechanical houses or diffusers or see for more details in the sensor chip datasheet and/or in the design considerations.
Figure 1:
Kit Content
1
2
3
Pos.
1
2
3
Item
USB Cable
AS7265x Multispectral Chipset Board
USB Data Stick
Comment
USB
– UART Cable with MicroUSB Connector
Evaluation Board
Documents, software, firmware and drivers
1
Rarely, a hardware in a supplied sensor unit may have the revision 1Vx. Please check if the firmware 12Vx is loaded. This is compatible with the functions described here. Otherwise, please contact the ams support for a Firmware update or sensor exchange.
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1.2 Ordering Information
Ordering Code
AS7265x Demo Kit
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AS7265x Multispectral Chipset
Introduction
Description
Demo Kit AS7265x Multispectral Chipset v3
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2 Getting Started
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Getting Started
The demo kit requires one time installation of FTDI Virtual COM Port Driver for the USB cable as well as the free ActiveState ActiveTcl Community Edition for the dashboard software if both are not already installed on the computer. Both installation files can be found in the USB Data Stick in the setup directories. Please install it as an administrator.
If there is an issue about the installation, please read our AS7265x_Demo_Kit_Installation_
Quick_Start_Guide.pdf on USB stick or refer to www.ftdichip.com
and www.activestate.com
for more information.
The Dashboard software does not require an installation. Please copy the following files to any folder you would like to work with and double click the “.tbc” file to start the GUI.
Figure 2:
AS7265x Software Files on USB Stick
#
1
2
3
4
File / Directory Comment
ams_Spectral_Sensor_Dashboard_x.x.xx.tbc in directory .\Dashboard Software
Tcl file with revision x.x.xx ams_logo_xxx.gif or ams_logo_xxx.png in directory .\Dashboard Software
ams
logo
FTDI Virtual COM Port Driver Setup
ActiveState TCL Run-Time Setup
Driver setup for FTDI cable
TCL setup
After the installation, click “ams_Spectral_Sensor_Dashboard_x.x.x.tbc” file provided with the kit to launch the Dashboard software. “x.x.x” is the revision number of the software and can be higher than shown here.
Please see chapter 4 for the software handling and description.
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3 Hardware Description
AS7265x Multispectral Chipset
Hardware Description
The AS7265x Multispectral Chipset board by default consists of the UART interface, the LDO for 3.3V supply, AS72651/AS72652/AS72653 devices with associated flash memory, and the programming header for the flash memory.
2
If you would like to evaluate AS7265x Multispectral Chipset products with an I
2
C interface, the board
also has the option for that. Please refer to chapter 3.4.
3.1 Hardware Architecture
The AS7265x hardware exists from sensor chips AS7265x, power supply, serial flash and interfaces.
The following Figure 3 shows the block diagram with sensor chips, power supply, memory and
interfaces. See the sensor data sheets for more sensor or local network details.
Figure 3:
Board Block Diagram
LDO
3V3
5V 3V3
PC
Terminal
MicroUSB
UART
AS72651
I2C
AS72652
AS72653
SPI
Memory
2
In exceptional cases, other fully compatible sensor chips like AS7263 and/or AS7265/AS27266/AS2767 may be mounted on
AS7265x evaluation kits. In this case, these chips replace the original sensor chips in all functions and parameters.
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AS7265x Multispectral Chipset
Hardware Description
Figure 4 shows the positions of the sensors, LEDs and interfaces on the sensor board. Compare
these components with their given details in the schematics in chapter 5.
The following chapters describe the main components of the AS7265x Multispectral chipset.
Figure 4:
Connectors, Sensors and LEDs
Pos. Designator
A
B
C
D
E
F
J1
AS72651, D9
Comment
AS72652/3, D12/13 AS72652/3 with Place Holders for the LEDs
J2
J5
J4
MicroUSB (UART) Connector; connect to a personal computer
AS72651 with Place Holders for the LED
Flash Memory Programming Header
Alternative system interface (see schematic interface)
Connector for FlashCatUSB programmer tool
3.2 Sensor Architecture
The AS7265x multispectral chip set architecture considers the realization of an add-on local sensor network based on three AS7265x sensor devices connected via I²C. These sensor devices are identical in function and parameters but alternative and complementary in their spectral filters.
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AS7265x Multispectral Chipset
Hardware Description
One sensor device is the master in the local network and realizes the host and master/slave
solution as “multiple spectral chipset” is possible (see Figure 6).
Figure 5:
Block Diagram
uP
Flash
100nF
3V
10uF
VDD1
VDD2
RX / SCL_S LED_IND
TX / SDA_S
INT
AS72651
MOSI
MISO
SCK
LED_DRV
6
SDA_M
ADDR
GND
Channel
Sensor
3V
100nF
3V
10uF
SCL_S
SDA_S
ADDR
VDD1 VDD2
LED_IND
GND
AS72652
6
Channel
Sensor
LED_DRV
3V
6
Channel
Sensor
LED_DRV
AS72653
3V
SCL_S
SDA_S
VDD2
VDD1
3V
10uF
100nF
Target
Reflective
Surface
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Figure 6:
Spectral Filter Curves of the Sensor System
AS7265x Multispectral Chipset
Hardware Description
AS7265x Multiple Spectral Chipsets
1
0,5
0
380 420 460 500 540 580 620 660 700 740 780 820 860 900 940
3.3 Power Supply
The AS7265x Multispectral Chipset board operates with the MicroUSB cable that connects to personal computer. The onboard LDO converts 5V USB power to 3.3V for the chipsets.
3.4 Interface to Controller
AS7265x Multispectral Chipset board by default has UART interface to a controller. A user could get the sensors data with the Dashboard software. J1 is the MicroUSB connector that connects the cable to a computer for UART interface. The cable has an internal USB-UART convertor.
It is very easy to evaluate AS7265x Multispectral Chipset solution with AT commands through the
UART interface. The Spectral Sensor Dashboard software runs on a Windows computer.
Nevertheless, I
2
C interface can be supported with a minor modification. The test points in Figure 7 can
be used for I
2
C connection. The test point, TX, should be connected to SDA and the test point, RX, should be connected to SCL. In addition, R3/R4 are for I
2
C pull up resistors. R17 and R18 would pull
I
2
C_ENB pin of AS72651 up or down for selecting UART or I
2
C interfaces. Install R17 for I
2
C interface and install R18 for UART interface.
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Figure 7:
Components for I²C or UART Interface
AS7265x Multispectral Chipset
Hardware Description
3.5 LEDs
The Multispectral Chipset demo board does not include mounted LEDs as standard. On the other side, some of customer applications require external LEDs as the light source. The AS7265x
Multispectral Chipset demo board has some LED placeholders on board for this purpose. Each LED is series with a current limit resistor. By default, the LEDs and the resistors are unpopulated.
Figure 5 shows the typical sensor block diagram from one sensor chip. Note, all AS7265x sensor
chips of the Multispectral chipset includes a LED_DRV function. Therefore, the set supports three separate addressable LEDs on board which must be re-soldered by the customer. In contrast, the board solution of the chip set only considers one LED_ind function in contrast to the block diagram in
All optical characteristics are optimized for diffused light. When using a point light source or collimated light on the sensor, the sensor opening must be covered by a lambertian diffuser with achromatic characteristics. Diffusor of Tsujiden like D121UP have been successfully tested at
ams
. If in the application diffused light, e.g. used by a reflective surface, no additional diffuser is required.
A generic application of AS7265x is to shine light rays to a target and AS7265x produces outputs based on the reflected light rays. So LED selection is determined by the spectral responsivity of reflected light and characteristics of the target. For example, if the target is expected to absorb 680nm light and the application needs to distinguish the target from others, a broadband white LED might be used as the light source with AS72651 and the 680nm channel should be checked. Various applications may require different light sources.
The place holders for LEDs are D9, D12, and D13 (see Figure 4 left side). D9 is connected to
AS72651 and ATLED0 = 100/0 turns D9 ON/OFF. D12 is controlled by AS72652 and ATLED2 = 100/0 turns it ON/OFF. D13 is controlled by AS72653 and ATLEDE = 100/0 turns it ON/OFF. The AS7265x device supports various LED currents, 12.5mA, 25mA, 50mA, or 100mA. ATLEDC = 0/16/32/48
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AS7265x Multispectral Chipset
Hardware Description
(decimal) sets the current through D9 to 12.5mA/25mA/50mA/100mA. Similarly, ATLEDD sets the current of D12 and ATLEDE sets the current of D13.
The LED currents can be also controlled and configured with the virtual I
2
C registers, 0x07 (the register address 0x87 for write) for D9, 0x2E (the register address 0xAE for write) for D12, and 0x2F
(the register address 0xAF for write) for D13. For more details, see the description of the I²C
LED_CONFIG command in the AS7265x command set.
Since the power to the LEDs is 5V, the actual current through LEDs might be smaller if the forward of
LED is high. If this is the case, please connect the LED with an external power and pick the serial resistor value based on the forward voltage of the LED and the desired LED current. Please refer to the LED I-V curve specification. If the forward of LED is low, the current limit resistor can be installed with 0
Ω.
3.6 Firmware
Using the AS7265x chipset requires the use of a sensor device specific firmware. This firmware in the latest available version was loaded into a serial flash AT25SF041. A list of
ams
tested serial flash memories can be found in the
ams
application note “Serial flash programming and update” as well as an overview for the existing firmware versions and their possibility for uploading for first time or as update. Note, there are hardware and compatibility differences between the single firmware and hardware versions. Therefore, please ask the
ams
sales team for the latest versions before starting a new feasibility or project.
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4 Software Description
AS7265x Multispectral Chipset
Software Description
The following chapters describes the evaluation of AS7265x Multispectral Chipset with
ams
Spectral
Sensor Dashboard application running on a personal computer system.
4.1 Operation
After the installation, click “ams_Spectral_Sensor_Dashboard_x.x.x.tbc” file provided with the kit to lau nch the Dashboard software. ‘x.x.x’ is the revision number of the software.
Figure 8:
Spectral Sensor Dashboard Window after Startup
The PC COMM Port select window will appear first after Dashboard launch (and the hardware is connected to the USB port).
To find which (if more than one showing) COMM Port to select:
●
Open Windows Device Manager
●
Click on “Ports (COM & LPT)”
●
Find the “USB Serial Port (COMxx)”, and use that to select the correct COMxx.
Once COM Port is selected and the “18 Channel Sensor Page” will open.
4.2 18 Channel Sensor Page
The 18 Channel Sensor Page allows to readout 18 channels raw data from the three sensor devices
AS72651, AS72652 and AS72653. It also provides controls for the Update Mode, LED Control/+status and is equipped with a section to observe the Raw and Calibrated Data in 18 channels and special function to sort the data in the order of Channel, Wavelength and Spectrum.
Clicking the “Sample” button will update the displayed metrics once with the most current data.
Selecting “Continuous”, the “Sample” button will change to the “Start” button.
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AS7265x Multispectral Chipset
Software Description
Click the button to enable a display of continuously update metrics. If “Stop After” is not used, which is the sample limit, sampling will not stop.
●
The “LED0” control sets AS72651 indicator LED current to on (1mA) or off as desired. It cannot be set once continuous sampling is set so should be setup prior. Also, the indicator LED flashes during AS72651 firmware updates regardless of the “LED0” control setting.
●
The “LED1” control sets AS72651 onboard LEDs current to 12.5mA, 25mA, 50mA, 100mA or
OFF as desired. It cannot be set once continuous sampling is set so should be setup prior. The
“LED2” and “LED3” controls set AS72652 and AS72653 onboard LEDs current. By default onboard LEDs are not installed. The LED should be installed based on the application. The place holders, D9/D10/D12/D13, are for LEDs.
●
The “Status” control give you the time of last sample and display the number of samples read in the “Samples” control.
●
The 18 Channel Sensor Values displays the current raw data.
Figure 9:
18 Channel Sensor Page
3
A spectrum function is implemented to plot the graph based on the sensor data reading at its corresponding wavelength.
●
User can select plotting based on selecting raw data or calibrated data.
●
“Lock” checkbox gives the flexibility to lock a range of amplitude for sensor readings.
3
In case of incorrect displays or moved menus, please stop the Dashboard software. Start
“Tcl – Installation directory \ bin \ wish86.exe, select the parameters “/ Properties / Compatibility” by clicking the right mouse key, select “Override high DPI scaling behavior” and “In Scaling performed by: System”. Then click ok and start the dashboard software again.
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AS7265x Multispectral Chipset
Software Description
●
“Spline” checkbox gives the ability to select between the line graph and spline graph. Spectrum
displays plotted Spline graph with raw data are shown in the following Figure 10.
Figure 10:
Spectrum
4.3 Logging & Control Page
The “Logging & Control” page gives you more information about AS7265x Multispectral Chipset as well as more controls. It includes “Logging” and “Sensor Control”.
●
If desired, click the “Open Data Log ” to store AS7265x Multispectral Chipset data (Excel CSV format). When the sampling is done, close the log file to store the data, or set the number in the
“Stop After” control on previous page and that will automatically store the data.
●
Modify the “Sensor Control” for Integration Time and Gain as needed by typing in the value or
Up-Down arrow.
●
“Factory Reset” reset stored values and parameters like Gain, Integration time, Samples and
LED Control to ‘Factory’ default values.
●
The “Device” control provide more information about AS7265x Multispectral Chipset
Logged Data Format (when data file is designated and logging is enabled, 2 samples)
As shown above, the logged test data are saved in Excel CSV format. Data are saved in the user specified file name and location. Timestamp is YYYY/MM/DD/seconds_since_midnight.
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Figure 11:
Logging & Control Page
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Software Description
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Software Description
4.4 Console Page
The Console Page is the human-software interface for definition and processing of in/out files and for logging the AT-commands.
Figure 12:
Console Page
AT commands could be both observed and entered on the “Console” page.
●
After a control is changed or data are sampled the resulting AT Commands can be observed on this page and optionally captured on the computer running Dashboard.
●
And if desired commands can be entered on this page, in the AT Command line at the top of the page or via the Playback of previously captured commands.
●
Use “Open Cmd Log” to create a “.txt” file in a desired folder. Once “Close Cmd Log” is pressed all output from the log window will be stored in log file.
●
In Capture mode use “Open Cmd File” to create “.cmd” file. AT Commands typed in will be saved on pressing enter, then “Close Cmd File” to capture the entered AT Commands. The command file can be changed in a windows text editor e.g. to add or remove AT commands. In
Playback mode use “Open Cmd File” to open the saved “.cmd” file, then “Playback”, to execute the stored commands.
●
“Clear Output” is used to clear all the previous AT Command measured in Console Page
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4.5 FW Update Page
Figure 13:
FW Update Page
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Software Description
As shown above on the Update page, AS7265x Multispectral Chipset firmware can be updated from the Dashboard:
4
●
Obtain the latest “*.bin” AS7265x Multispectral Chipset firmware file
5
from
ams
, via email or
USB flash drive, etc.
●
Store the “*.bin” file on the computer.
●
Use the “Select Local Firmware Image” button as shown above to navigate to the “*.bin” file.
●
Next, select the “Update Firmware” button to start the update procedure; once the update is finished, the “Current Firmware Version” is updated with new firmware.
●
After firmware update is complete close the Dashboard software, cycle power on the hardware by unplugging and re-plugging the USB connection and then re-launch Dashboard.
●
“Revert to Previous Firmware” can be used to degrade back to previous version.
4
Please note: FW11.0.0 or later is required to support the firmware update feature with this GUI of generation 2. In addition, a change in PIN configuration for the new firmware 11.xx compared to the old version. Therefore might exists a special firmware variant for Moonlight which is not hardware compatible to standard firmware 11.x.x
5
The given manual for the software is based on the hardware release 1V1 generation 1 of the Multispectral Chipset evaluation kit. Make sure, the update file for the firmware is compatible with these releases. For more details, see the application note
“AS7265x Design considerations”.
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5 Schematics, Layers and BOM
AS7265x Multispectral Chipset
Schematics, Layers and BOM
Figure 14:
Schematic, Interfaces and BOM
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Schematics, Layers and BOM
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Schematics, Layers and BOM
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6 Revision Information
AS7265x Multispectral Chipset
Revision Information
Changes from previous version to current revision v1-00 Page
●
●
From 1.x.x to 2.0.0 - all chapters have been revised; software and hardware converted into one manual and all changes of generation 2 of HW/SW/FW were considered in a new
ams
template all
Page and figure numbers for the previous version may differ from page and figure numbers in the current revision.
Correction of typographical errors is not explicitly mentioned.
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7 Legal Information
AS7265x Multispectral Chipset
Legal Information
Copyrights & Disclaimer
Copyright ams AG, Tobelbader Strasse 30, 8141 Premstaetten, Austria-Europe. Trademarks Registered. All rights reserved.
The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.
Demo Kits, Evaluation Kits and Reference Designs are provided to recipient on an “as is” basis for demonstration and evaluation purposes only and are not considered to be finished end-products intended and fit for general consumer use, commercial applications and applications with special requirements such as but not limited to medical equipment or automotive applications. Demo Kits, Evaluation Kits and Reference Designs have not been tested for compliance with electromagnetic compatibility (EMC) standards and directives, unless otherwise specified. Demo Kits, Evaluation Kits and Reference Designs shall be used by qualified personnel only. ams AG reserves the right to change functionality and price of Demo Kits, Evaluation Kits and Reference Designs at any time and without notice.
Any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed. Any claims and demands and any direct, indirect, incidental, special, exemplary or consequential damages arising from the inadequacy of the provided Demo Kits, Evaluation Kits and Reference Designs or incurred losses of any kind (e.g. loss of use, data or profits or business interruption however caused) as a consequence of their use are excluded. ams AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of ams AG rendering of technical or other services.
RoHS Compliant & ams Green Statement
RoHS Compliant:
The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes.
ams Green (RoHS compliant and no Sb/Br):
ams Green defines that in addition to RoHS compliance, our products are free of
Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material).
Important Information:
The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. ams AG has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
Headquarters
ams AG
Tobelbader Strasse 30
8141 Premstaetten
Austria, Europe
Tel: +43 (0) 3136 500 0
Please visit our website at www.ams.com
Buy our products or get free samples online at www.ams.com/Products
Technical Support is available at www.ams.com/Technical-Support
Provide feedback about this document at www.ams.com/Document-Feedback
For sales offices, distributors and representatives go to www.ams.com/Contact
For further information and requests, e-mail us at [email protected]
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