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Summary of Contents for AMS AS3933
- Page 1 Application Note: AS3933-AN01 – Demoboard Description AS3933 3D Low Frequency Wakeup Receiver www.ams.com Revision 1.1/ 24/02/13 page 1/20...
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Page 2: Table Of Contents
General Description ......................4 Kit Content ........................... 4 Getting Started ........................4 Hardware Description......................4 AS3933 Demoboard......................4 125kHz Wake-up Transmitter Board..................6 Software Description ......................7 Installing the GUI ........................7 Description of the GUI of the Receiver ................8 5.2.1... - Page 3 Manchester Pattern Length ....................13 5.3.7 Correlator ........................... 13 Board Schematics, Layout and BOM ................. 14 AS3933 Demoboard Schematic ..................14 AS3933 Demoboard Layout ....................15 AS3933 Demoboard BOM ....................16 125 kHz Wake-up Transmitter Board Schematics ............. 17 125 kHz Wake-up Transmitter Board Layout ..............17 125 kHz Wake-up Transmitter Board BOM ...............
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Page 4: General Description
Demoboard Description General Description 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. - Page 5 Strongest wake-up signal received on channel 3 (Z) Figure 4: Jumper Description Jumper Name Description Info Supply The supply current of the AS3933 can be measured here. Set Current this jumper for normal operation. AS3933 specific outputs WAKE Wake Output Interrupt Data Output...
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Page 6: 125Khz Wake-Up Transmitter Board
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. -
Page 7: Software Description
AS3933-AN01 Demoboard Description Figure 7: Indication LEDs/ Buzzer LEDs Color Info Buzzer The buzzer signals whenever a wake-up pattern is transmitted. This 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. -
Page 8: Description Of The Gui Of The Receiver
Preset Default. All configurations that are set by the GUI correspond to the Register Map of the AS3933. The Register Map can be viewed via View/Register Map (Ctrl+M). All registers can be updated manually via File/Readout Registers (Ctrl+R) or the update of the registers is done automatically via File/Automatic Update (Ctrl+U). -
Page 9: Clock Generator
The RC oscillator can be calibrated via the microcontroller or the LC antenna. 5.2.5 Antenna Damper The antenna can be damped in order to limit the range. Therefore a resistor inside the AS3933 is switched into parallel to the antenna. The value of the resistor can be selected between 1kΩ to 27kΩ. -
Page 10: Frequency Detection Tolerance
Enable Correlator: If the Correlator is enabled the chip searches first for the preamble bits and then for data pattern (Manchester encoded wake-up pattern). Should the pattern correlation be disabled, the AS3933 goes directly into the data receiving mode. •... -
Page 11: Automatic Time-Out
The internal capacitor bank can be changed on each channel between 0pF and 32pF in order to tune the antenna to the desired resonance frequency. The AS3933 Demoboard provides a switch to tune the antenna automatically to 125 kHz. The internal capacitor bank is changed until the resonance frequency of 125 kHz is achieved. -
Page 12: Description Of The Gui Of The Transmitter
5.3.3 Symbol Rate The symbol rate can be adjusted between 512 Symbols/s and 4096 Symbols/s. The symbol rate must be the same as at the settings made with the AS3933 Demoboard. www.ams.com Revision 1.1/ 24/02/13... -
Page 13: Enable Buzzer
5.3.5 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 5.2.12. 5.3.6 Manchester Pattern Length Please see description above in section 5.2.13. -
Page 14: Board Schematics, Layout And Bom
AS3933-AN01 Demoboard Description Board Schematics, Layout and BOM 6.1 AS3933 Demoboard Schematic VBUS AS1362 BUS_PWR SHDNN BYPASS Zener 100k AS1362 BUS_GND 100k Shield BATT USB_MINI_B 100n COM1 COM2 BATT AS1746 AS1746 4.7u Batterie VDD_UC 100n VBUS BUTTON PIC27FJ64GB002 Mode VDD_RF... -
Page 15: As3933 Demoboard Layout
AS3933-AN01 Demoboard Description 6.2 AS3933 Demoboard Layout Figure 10: AS3933 Demoboard Layout –Top Layer Figure 11:AS3933 Demoboard Layout – Bottom Layer www.ams.com Revision 1.1/ 24/02/13 page 15/20... -
Page 16: As3933 Demoboard Bom
AS3933-AN01 Demoboard Description 6.3 AS3933 Demoboard BOM www.ams.com Revision 1.1/ 24/02/13 page 16/20... -
Page 17: 125 Khz Wake-Up Transmitter Board Schematics
AS3933-AN01 Demoboard Description 6.4 125 kHz Wake-up Transmitter Board Schematics H2961CT-ND VBUS BUS_PWR 6.8V 100k AUTO BUS_GND Mode Shield PMEG4010 USB_SMD PATT +12V +3.3V VOUT Mode SK310A 220u 220u AS1360 DC_Socket_THMD PATT+DATA +3.3V Mode 100n VBUS PIC27FJ64GB002 STOP +12V +12V... -
Page 18: 125 Khz Wake-Up Transmitter Board Bom
AS3933-AN01 Demoboard Description 125 kHz Wake-up Transmitter Board BOM www.ams.com Revision 1.1/ 24/02/13 page 18/20... -
Page 19: Ordering Information
1000 pcs Reel 1. Dry Pack: Moisture Sensitivity Level (MSL) = 3, according to IPC/JEDEC J-STD-033A. Note: All products are RoHS compliant and ams green. Buy our products or get free samples online at ICdirect: http://www.ams.com/ICdirect Technical Support is available at http://www.ams.com/Technical-Support... - Page 20 No obligation or liability to recipient or any third party shall arise or flow out of ams AG rendering of technical or other services. www.ams.com Revision 1.1/ 24/02/13...
- Page 21 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: AS3933-DB...
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