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ScioSense The technical content of this document under ams / Applied Sensors / acam- messelectronic / Cambridge CMOS Sensors is still valid. Contact information Headquarters: Sciosense B.V. High Tech Campus 10 5656 AE Eindhoven The Netherlands info@sciosense.com www.sciosense.com...
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Demo Kit Manual DN[Document ID] AS3933 Standard Board AS3933 DEV SYSTEM ams Demo Kit Manual, Confidential Page 1 [v1-02] 2014-Jul-11 Document Feedback...
AS3933 Standard Board Introduction With the AS3933 Demoboard it is possible to demonstrate the chip’s features as described in the AS3933 datasheet. The 125kHz Wake-up Transmitter Board is included to offer the user a complete system for evaluation purposes. This application note describes the operation of the two boards and gives details on the hardware and software implemented in the demokit.
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AS3933 Standard Board Label Name Description Info Long press (1.5s) tunes Each axis (X,Y, and Z) of the LF antenna can be the antenna tuned exactly to 125kHz. The resonance frequency of each channel can be read out via the GUI.
AS3933 Standard Board Jumper Name Description Info Serial Digital Interface Output Ground (0V) Note: When the AS3933 Demoboard is connected to the GUI it is necessary to RESET the device by turning the AS3933 off and on via switch C. Another possibility to prepare the Demoboard for USB connection is to press buttons A and B simultaneously before connecting the USB cable.
AS3933 Standard Board LEDs Color Info feature makes range measurements easier. The buzzer can be disabled via the GUI. STANDBY Transmitter is on stand-by. No wake-up pattern is sent. Pattern Wake-up pattern is transmitted. Pattern+Data Wake-up pattern plus data is transmitted. Note: Before connecting the 125kHz Wake-up Transmitter Board to the GUI the transmission of wake-up patterns needs to be terminated by pressing button D.
AS3933 Standard Board Description of the GUI of the Receiver Figure 8: Graphical User Interface of the AS3933 Demoboard All adjustments can be saved via Store Settings in the lower right corner of the Receiver tab. If all settings should be reset to the default configuration push the button Preset Default. All configurations that are set by the GUI correspond to the Register Map of the AS3933.
AS3933 Standard Board 4.2.3 Clock Generator The clock source for the AS3933 can be selected here. The AS3933 Demoboard has an on-board crystal oscillator that is used by default. In case the RC oscillator is used it can be calibrated to achieve a higher precision.
AS3933 Standard Board 4.2.11 General Settings Enable sensitivity boost: The channel amplifier gain is boosted to +3dB. AGC only on carrier burst: The automatic gain control is acting only on the first carrier burst. AGC UP-DOWN: The automatic gain control is operating in both directions (up and down). At the beginning the gain of the channel amplifier is set to the maximum and the AGC reduces it according to the received signal input level.
AS3933 Standard Board 4.2.16 Symbol Rate The symbol rate can be adjusted between 512 Symbols/s and 4096 Symbols/s. The symbol sate defines the duration of one bit via the 32.768 kHz clock in order to recover the data. 4.2.17 Check Resonance Frequency The resonance frequency of all three channels of the antenna can be measured.
AS3933 Standard Board Description of the GUI of the Transmitter Figure 9: Transmitter tab of the AS3933 GUI All adjustments can be saved via Store Settings in the lower right corner of the Transmitter tab. If all settings should be reset to the default configuration push the button Restore Default Settings. 4.3.1 Duration of Carrier Burst The duration of the carrier burst can be set in multiples of carrier cycles (0-500 x 8µs) or in milliseconds (1-3).
AS3933 Standard Board 4.3.5 Wakeup Pattern (Manchester) The wake-up pattern transmitted by the transmitter board must correlate to the wake-up pattern expected by the AS3933 Demoboard for successful wake-up generation. For more details on the wake-up pattern see section Error! Reference source not found.. 4.3.6 Manchester Pattern Length Please see description above in section Error! Reference source not found..
AS3933 Standard Board Ordering & Contact Information Ordering Code Description AS3933 DEV SYSTEM AS3933 Demo Kit Standard Board Buy our products or get free samples online at: www.ams.com/ICdirect Technical Support is available at: www.ams.com/Technical-Support Provide feedback about this document at: www.ams.com/Document-Feedback For further information and requests, e-mail us at: ams_sales@ams.com...
AS3933 Standard Board Copyrights & Disclaimer Copyright ams AG, Tobelbader Strasse 30, 8141 Unterpremstaetten, 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”...
AS3933 Standard Board Revision Information Changes from 1-00 (2010-Jul-20) to current revision 1-02 (2014-Jul-11) Page 1-01 Update to corporate format (2013-Feb-24) 1-02 Update to corporate format 1-20 Note: Page numbers for the previous version may differ from page numbers in the current revision. ams Demo Kit Manual, Confidential Page 20 [v1-02] 2014-Jul-11...
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