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
