austriamicrosystems AS3930 Installation and operating instructions

Application Note AS3930
Description of the AS3930 Demosystem
Revision: 1.0
Programmable 1D ow Frequency Wakeup Receiver
AS3930
APP ICATION NOTE
Copyright © 2009
austriamicrosystem
s

Application Note AS3930 – Description of Demosystem
Version 1.0, Date: 09/03/2010
www.a striamicrosystems.com/AS3930
Page 2 of 9
Copyright © 2009 austriamicrosystems
Contents
1
INTRODUCTION..........................................................................................................................3
2
OVERVIEW OF THE RX BOARD..............................................................................................3
3
OVERVIEW OF THE TX BOARD..............................................................................................4
4
HOW TO QUICKLY GET STARTED........................................................................................7
4.1
R
ANGE MEASUREMENT
..............................................................................................................7
4.2
D
IFFERENT PATTERN DETECTION
...............................................................................................7
4.3
W
AKEUP BASED UPON FREQUENCY DETECTION
.........................................................................7
5
APPENDIX A: TRANSMITTER AND RECEIVER ANTENNAS ...........................................8

Application Note AS3930 – Description of Demosystem
Version 1.0, Date: 09/03/2010
www.a striamicrosystems.com/AS3930
Page 3 of 9
Copyright © 2009 austriamicrosystems
1Introduction
The demo-kit consists of a AS3930 LF wake- p receiver board, a 3V CR2032 Lithi m Battery, a LF transmitter
board and a 9V power s pply. The power s pply cable is not incl ded and has to be chosen according to the
specific pl g (depending on the co ntry).
The receiver board s pports single dimensional field detection and can show the main f nctionality of the
AS3930. The receiver board can work completely stand alone; in fact neither power supply nor a PC are
needed. It is possible to see the AS3930 main f nctionality j st operating the b ttons present on the board. The
chip will be programmed sing a microcontroller.
The transmitter board generates the field capable to wake the receiver p. Even this board does not need any
PC connection b t has to be s pplied by the incl ded power s pply. With this demo system it is possible to get p
to 5m comm nication range.
2Overview of the RX board
The receiver board (RX-Board) consist of an AS3930 LF-Wake p receiver, a microcontroller for programming
the device, a single axis coil, a main switch, 2 pin connectors shorted with a j mper (where to meas re the c rrent
cons mption of the AS3930), a set of 4 pin connectors where to monitor the o t coming signals of the AS3930, 1
b tton to program the AS3930, 3 red LEDs which show 3 different set ps for the AS3930, and arrays of 5 green
LEDs showing the RSSI of the received signal.
A top view of the board is shown in the Fig. 1.
Figure 1: top view of the AS3930 F Wake-up Receiver demo board
To power- p the board, the battery has to be set into the battery holder (see the back side of the board), facing
the pl s (+) p, the main switch has to be p t on and the microcontroller has to be reset by p shing the b tton
RST (reset microcontroller). On the top
As shown in the fig re 1 on the top side of the RX board there are few j mpers divided in two gro ps; the
control signal for the SPI (CS, CLK, DI, DO) and the o tp t signals of the AS3930 (WAKE, DAT, DAT_CL). With
the help of an oscilloscope it is possible to monitor these signals when the board is working.
The MODE b tton allows the application to program the AS3930 in three different modes:
1. P1: the AS3930 is programmed to detect and wake p on the standard pattern (96)h –Manchester-.
2. P2: the AS3930 is programmed to detect and wake p on an alternative pattern (C8)h –Manchester-.
3. RSSI_ON: the AS3930 is programmed to wake p on freq ency detection only

Application Note AS3930 – Description of Demosystem
Version 1.0, Date: 09/03/2010
www.a striamicrosystems.com/AS3930
Page 4 of 9
Copyright © 2009 austriamicrosystems
Regardless which mode is chosen, when the AS3930 wakes p the RSSI LEDs show the RSSI level, as it is
read o t from the R10<4:0> of the AS3930. the RSSI therefore will be shown as binary representation where BIT4
is the MSB and BIT0 the LSB.
The J mper next to the RST b tton allows meas ring the c rrent cons mption of the only AS3930 with the
help of a tester.
3Overview of the TX board
The LF Transmitter Board (TX-board) consist of a 9-12V DC pl g, a microcontroller, an antenna and 5 b ttons.
The TX-board needs to be connected to the power s pply provided in the kit. The power s pply has to be
connected to the power line with an appropriated cable (not incl ded).
Power
Supply
Plug
Buttons
PREMO EMITTER
ANTENNA
KGEA-BFCR-B-0500J
The carrier freq ency of the TX-board is 125 kHz.
On the board 5 b ttons are present:
RST_MCU: this b tton resets the system and sets the board in a standby mode (no signal is prod ced on the
antenna) this b tton has to be p shed every time after powering on the board.
PATT1: pressing this b tton the board will send only one time the Pattern1 (96)h –Manchester- following the
preamble. When the Pattern1 is sent no more activity will be present on the antenna.

Application Note AS3930 – Description of Demosystem
Version 1.0, Date: 09/03/2010
www.a striamicrosystems.com/AS3930
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Copyright © 2009 austriamicrosystems
PREAMBLE PATTERN
BUTTON PRESSING
PATT2: pressing this b tton the board will send only one time the Pattern2 (C8)h –Manchester- following the
preamble. When the Pattern2 is sent no more activity will be present on the antenna.
CONT_P1: pressing this b tton the board will send contin o sly the Pattern1 every 1 sec. circa. To go back to
standby mode the b tton RST_MCU m st be pressed.
PREAMBLE PATTERN
BUTTON PRESSING
PREAMBLE PATTERN PREAMBLE PATTERN
CONT_10: pressing this b tton it will be contin o sly sent carrier OOK mod lated with a freq ency of 1.35
kHz.

Application Note AS3930 – Description of Demosystem
Version 1.0, Date: 09/03/2010
www.a striamicrosystems.com/AS3930
Page 6 of 9
Copyright © 2009 austriamicrosystems
PREAMBLE PATTERN
BUTTON PRESSING
OOK Modulated Carrier

Application Note AS3930 – Description of Demosystem
Version 1.0, Date: 09/03/2010
www.a striamicrosystems.com/AS3930
Page 7 of 9
Copyright © 2009 austriamicrosystems
4How to quickly get started
•Unpack the TX-board and RX-board
•Power p the TX board with the power s pply (provided in the kit)
•P sh the RST_MCU b tton on the TX-board (the board will be set to a stand-by mode)
•On the RX board, insert the battery into the battery holder, switch on the board and press the RST b tton.
4.1 Range measurement
On the RX-board:
•Switch on the board
•Press the b tton MODE ntil the LED P1 is on
On the TX-board:
•P sh the b tton RST_MCU
•P sh the b tton CONT_P1
Since the b tton CONT_P1 has been p shed the TX board sends the PATTERN1 ro ghly once a second. Every
time that the pattern is received and recognised by the AS3930 the RSSI is displayed for few h ndreds of
milliseconds going a tomatically back to listening mode (the RSSI will disappear). By moving the RX-board away
from the TX-board it is possible to see what the maxim m comm nication range of the system is. Please note that
as the AS3930 is a single channel LF Wake p receiver in case the TX and the RX antenna are not parallel
oriented each other the received signal, respectively the comm nication range, will be m ch smaller.
4.2 Different pattern detection
On the RX-board:
•Switch on the board
•Press the b tton MODE ntil the LED P1 is on
On the TX-board:
•P sh the b tton RST_MCU
Every time that the b tton PATT1 on the TX board is pressed the AS3930 will wake p if within the comm nication
range, while if pressing the b tton PATT2 this will not happen. It is also possible to program the RX board on the
pattern2 pressing the MODE b tton on the RX board till the P” LED is on; in this case the AS3930 will wake p
every time that on the TX board the b tton PATT2 will be pressed, while the PATT1 will not sort any effect.
4.3 Wakeup based upon frequency detection.
On the RX-board:
•Switch the board on
•Press the b tton MODE ntil the LED RSSI_ON is on
On the TX-board:
•P sh the b tton RST_MCU
Once those operations have been done, the AS3930 is capable to wake p both on the pattern1 (PATT) and on
the pattern2 (PATT2

Application Note AS3930 – Description of Demosystem
Version 1.0, Date: 09/03/2010
www.a striamicrosystems.com/AS3930
Page 8 of 9
Copyright © 2009 austriamicrosystems
5Appendix A: Transmitter and Receiver Antennas
The AS3930 Demosystem mo nts as Receiver Antenna the SDTR1103-1620J from Premo (see
http://premo.es/in/prod ct/156/feat res/rfid/singleaxistranponderind ctors/sdtr1103smddropresistanttransponderco
il%2816.2mh-340 h%29.html ). This is a single axis transponder SMD coil.
On the Transmitter side the emitter antenna KGEA-BFCR-B-0500J is sed (see
http://premo.es/ ploads/fam_file00000114_1230470278.pdf) . This is a sealed resonator t ned at 125kHz.

Application Note AS3930 – Description of Demosystem
Version 1.0, Date: 09/03/2010
www.a striamicrosystems.com/AS3930
Page 9 of 9
Copyright © 2009 austriamicrosystems
Contact
Headq arters:
a striamicrosystems AG
Tobelbaderstrasse 30
A 8141 Unterpremstaetten, A stria
T. +43 (0) 3136 500 0
F. +43 (0) 3136 525 01
wireless@a striamicrosystems.com (Information req ests)
http://www.a striamicrosystems.com/Contact-Us (Worldwide locations)
http://www.a striamicrosystems.com/ICdirect (Online-shop)
Copyright
Copyright © 2009 a striamicrosystems. Trademarks registered ®. All rights reserved. The material herein may
not be reprod ced, adapted, merged, translated, stored, or sed witho t the prior written consent of the copyright
owner.
To the best of its knowledge, a striamicrosystems asserts that the information contained in this p blication is
acc rate and correct. a striamicrosystems reserves the right to discontin e prod ction and change specifications
and prices, make corrections, modifications, enhancements, improvements and other changes of its prod cts and
services at any time witho t notice.
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