AMS AS3930 User manual

Demo Kit Manual
DN[Document ID]
ams Demo Kit Manual, Confidential
Page 1
[v1-02] 2014-Jul-10
Document Feedback
AS3930
Standard Board
AS3930 DEMOSYSTEM

AS3930 Standard Board
ams Demo Kit Manual, Confidential
Page 2
[v1-02] 2014-Jul-10
Document Feedback
Table of Contents
1Introduction .......................................................................................................................... 4
1.1 Kit Content ........................................................................................................................... 4
2Getting Started..................................................................................................................... 4
3Hardware Description........................................................................................................... 5
3.1 AS3930 Demoboard Description ......................................................................................... 5
3.2 125 kHz Wakeup Transmitter Board.................................................................................... 6
4Software Description............................................................................................................ 7
4.1 Install the GUI ...................................................................................................................... 7
4.2 Description of the GUI of the Receiver ................................................................................ 8
4.2.1 Settings Description............................................................................................................. 9
4.2.1.1 Low Power Mode ................................................................................................................. 9
4.2.1.2 Clock Generator................................................................................................................... 9
4.2.1.3 Calibrate RC Oscillator ........................................................................................................ 9
4.2.1.4 Antenna Damper.................................................................................................................. 9
4.2.1.5 Gain Reduction .................................................................................................................... 9
4.2.1.6 Automatic Time-Out............................................................................................................. 9
4.2.1.7 Envelope Detector Time Constant....................................................................................... 9
4.2.1.8 Data Slicer............................................................................................................................ 9
4.2.1.9 Comparator Hysteresis ......................................................................................................10
4.2.1.10 Frequency Detection Tolerance.........................................................................................10
4.2.1.11 Wakeup Pattern (Manchester)........................................................................................... 10
4.2.1.12 General Settings ................................................................................................................ 10
4.2.1.13 Correlator ...........................................................................................................................10
4.2.1.14 Symbol Rate....................................................................................................................... 10
4.2.1.15 Artificial Wakeup ................................................................................................................ 10
4.2.1.16 Clear Wake ........................................................................................................................ 10
4.2.1.17 Reset RSSI ........................................................................................................................ 10
4.3 Clear False Wakeup........................................................................................................... 11
4.4 Description of the GUI for the Wake-up Transmitter Board............................................... 11
4.4.1 Settings Description...........................................................................................................11
4.4.1.1 Duration of Carrier Burst....................................................................................................11
4.4.1.2 Number of Preamble Symbols........................................................................................... 12
4.4.1.3 Symbol Rate....................................................................................................................... 12
4.4.1.4 Enable Buzzer....................................................................................................................12

AS3930 Standard Board
ams Demo Kit Manual, Confidential
Page 3
[v1-02] 2014-Jul-10
Document Feedback
4.4.1.5 Wake-up Pattern (Manchester)..........................................................................................12
4.4.1.6 Manchester Pattern Length................................................................................................ 12
4.4.1.7 Correlator ...........................................................................................................................12
5Schematics, Layers and BOM ........................................................................................... 13
5.1 AS3930 Demoboard Schematic.........................................................................................13
5.2 AS3930 Demoboard Layout - Top and Bottom Layer........................................................ 14
5.3 AS3930 Demoboard BOM ................................................................................................. 15
5.4 125 kHz Wake-up Transmitter Board Schematic...............................................................16
5.5 125 kHz Wake-up Transmitter Board Layout..................................................................... 17
5.6 125 kHz Wake-up Transmitter Board BOM .......................................................................17
6Ordering & Contact Information.........................................................................................18
7Copyrights & Disclaimer.....................................................................................................19
8Revision Information .......................................................................................................... 20

AS3930 Standard Board
ams Demo Kit Manual, Confidential
Page 4
[v1-02] 2014-Jul-10
Document Feedback
1 Introduction
The AS3930 Demo Board demonstrates the main features of the AS3930. These include 1D wake-
up pattern detection, readout of false wake-ups, possibility to measure current consumption in
different operating modes, and measurement access to SPI communication and data output.
Additional features are accessible via USB through the GUI that was developed for easy access to
the register map. Features such as the programmable wake-up pattern, adjustable sensitivity level,
low power listening modes and several more can be programmed via the GUI. The influence
different settings have on the detection efficiency can be observed right away by using the 125 kHz
Wake-up Transmitter Board.
1.1 Kit Content
The AS3930 Demo Kit contains the following items:
1x AS3930 Demo Board
1x 125kHz Wake-up Transmitter Board
1x 9V power supply
2x CR2032 Coin Cell
1x USB stick
1x USB Cable
2 Getting Started
Connect the +9V DC Power Supply at “F” on the 125 kHz Wake-up Transmitter Board.
Start to transmit Wake-up Patterns via AUTO “C” or PATTERN “B”.
Insert the +3V Battery at “H” of the AS3930 Demo Board.
Turn on the AS3930 Demo Board via the ON/OFF –switch “C”. When turning on the boards all
indication-LEDs flash up once.
As soon as the AS3930 Demo Board receives a Wake-up Pattern, the RSSI LEDs flash up for
0.5s and show the actual Received Signal Strength.

AS3930 Standard Board
ams Demo Kit Manual, Confidential
Page 5
[v1-02] 2014-Jul-10
Document Feedback
3 Hardware Description
3.1 AS3930 Demoboard Description
Figure 1: AS3930 Demoboard Description Top and Bottom
Figure 2: User Interface Description
Label
Name
Description
Info
A
BUTTON
1x short press reads the
false wake-ups
The number of false wake-ups
can be read out and are displayed
via the RSSI –LEDs.
2x short press (double
click) clears the false wake-
ups
Pressing FALSE WAKEUP two
times resets the number of false
wake-ups. Each RSSI –LED is
turned on shortly.
C
ON/OFF
ON/OFF –Switch
Power on/off the demoboard.
Source (Battery or USB) is
automatically detected.
G
USB –
Connector
Mini USB 5-pin connector
USB Interface for the GUI
H
CR2032 BATTERY
Battery Holder
Insert CR2032 here.
Figure 3: Jumper Description
Jumper
Name
Description
Info
F
IDD
Supply Current
The supply current of the AS3930 can
be measured. Set this jumper for normal
operation.
A
C
D
E
F
H
G

AS3930 Standard Board
ams Demo Kit Manual, Confidential
Page 6
[v1-02] 2014-Jul-10
Document Feedback
Jumper
Name
Description
Info
D
AS3930 specific outputs
D1
WAKE
Wake Output Interrupt
D2
DAT
Data Output
D3
CL_DAT
Manchester Recovered Clock
E
Microcontroller - Interface
The SDI –Interface from the
microcontroller can be replaced by a
proprietary solution
E1
CS
Serial Digital Interface Chip Select
E2
SCL
Serial Digital Interface Clock
E3
SDI
Serial Digital Interface Input
E4
SDO
Serial Digital Interface Output
E5
GND
Ground (0V)
Note: To establish a connection between the GUI and the AS3930 the board must be RESET by switching the power OFF
and ON via “C”. Alternatively, the buttons “A” and “B” can be pressed simultaneously before connecting the USB cable.
3.2 125 kHz Wakeup Transmitter Board
Figure 4: Transceiver Board Description
Figure 5: User Interface Description
Label
Name
Description
Info
A
PATT+DATA
Pattern+Data –Button
Pressing this button the transmitter
sends continuously the wake-up
pattern plus data (01010101).
B
PATT
Single Pattern –Button
Pressing this button the transmitter
sends a single wake-up pattern.
E
A
B
C
D
F

AS3930 Standard Board
ams Demo Kit Manual, Confidential
Page 7
[v1-02] 2014-Jul-10
Document Feedback
Label
Name
Description
Info
C
AUTO
Automatic Pattern –
Button
Pressing this button the transmitter
automatically sends a wake-up
pattern every 1s
D
STOP
Stop Pattern –Button
This button stops sending the
continuous wake-up pattern
E
USB-Connector
Mini USB 5-pin
Connector
USB Interface for the GUI
F
Power Supply
+9V DC Power Supply
(2A)
Insert power adapter here.
Figure 6: Indication LEDs/Buzzer
LEDs
Blinking Color
Info
G
Buzzer
Whenever a wake-up pattern is transmitted the buzzer
signals shortly. The buzzer can be disabled via the GUI.
STANDBY
Red LED
Transmitter is on standby. No wake-up pattern is sent.
Pattern
Red LED
Wake-up pattern is transmitted
Pattern+Data
Red LED
Wake-up pattern plus data is transmitted
Note: Before the 125 kHz Wake-up Transmitter is connected to the GUI via USB it is necessary to stop transmitting Wake-
up Patterns by pressing the button “D”.
4 Software Description
4.1 Install the GUI
Execute the AS393x_EvalSW_v2.1.6b.msi which can be found on the USB stick in the folder
‘Software_Firmware’
Follow the installation guide
Run the GUI AS393x_EvalSW.exe
Attach the respective board ( Demo Board or Transmitter Board ) with the USB cable
From the pop up window ‘Choose Plugin’ choose the ‘AS3932_plugin.dll’
Figure 7: Plugin selection
Note: Before connecting the 125 kHz Wake-up Transmitter Board with the USB cable press “D” to stop transmitting wake-up
patterns.

AS3930 Standard Board
ams Demo Kit Manual, Confidential
Page 8
[v1-02] 2014-Jul-10
Document Feedback
4.2 Description of the GUI of the Receiver
Adjustments can be saved with Store Settings in the lower right hand corner of the Receiver tab.
The default settings can be restored with Preset Default. All configurations that are set by the GUI
correspond to the Register Map of the AS3930 which can be viewed via View/Register Map
(Ctrl+M). The Register Map can be updated manually (File/Readout Registers (Ctrl+R)) or
automatically (File/Automatic Update (Ctrl+U)).
Figure 8: AS3930 GUI -- Receiver Tab
Note: Firmware updates can be done via Help/Firmware Update (Ctrl+F). Load the latest *.bin file to update the firmware.
4.2.1 Settings Descriptions
4.2.1.1 Low Power Mode
The AS3930 features two low power modes which can be selected here. By default no power
saving mode is enabled. Thus, the receiver channel is active all the time. For the On\Off mode the
channel is activated only part of the time to minimize current consumption. For details please see
the AS3930 datasheet.
4.2.1.2 Clock Generator
The clock source for the AS3930 can be selected here. The AS3930 demoboard has an on-board
crystal oscillator that is used by default. When the RC oscillator is selected as clock source, its
precision can be improved by calibrating the oscillator.

AS3930 Standard Board
ams Demo Kit Manual, Confidential
Page 9
[v1-02] 2014-Jul-10
Document Feedback
4.2.1.3 Calibrate RC Oscillator
The RC oscillator can be calibrated via the microcontroller or the LC antenna.
4.2.1.4 Antenna Damper
The antenna can be damped in order to limit the range. Therefore, a resistor inside the AS3930 is
switched parallel to the antenna. The value of the resistor can be chosen between 1kΩ to 27kΩ.
4.2.1.5 Gain Reduction
The Gain Reduction of the channel amplifier can be selected between 0dB up to -24dB.
4.2.1.6 Automatic Time-Out
The Automatic Time-Out resets the WAKE pin automatically after a designated time which can be
set between 0ms and 350ms.
4.2.1.7 Envelope Detector Time Constant
The performance of the demodulator can be optimized according to the bit rate and preamble
length. If the bit rate increases the time constant has to decrease. Adjust this ED time constant
according to your symbol rate. The recommended time constants for different symbol rates are
listed in the datasheet.
4.2.1.8 Data Slicer
The threshold of the data slicer can be set to a fixed level by setting the ‘hard threshold enable’ bit.
This hard threshold can be reduced by setting the ‘hard threshold reduction’ bit. Otherwise, the
threshold will be dynamically set according to the incoming data signal.
In case the dynamic threshold is used (i.e. the ‘hard threshold enable’ bit is not set), the data slicer’s
noise immunity can be adjusted via the data slicer’s time constant. The bigger this time constant is,
the better its noise immunity will be. However, increasing the time constant is only effective if also
the preamble length is increased. Otherwise, the threshold will not have enough time to settle to the
correct value. Therefore, the data slicer’s time constant is linked to the minimum preamble length.
The recommended minimum preamble lengths for different data slicer time constants are listed in
the datasheet.
4.2.1.9 Comparator Hysteresis
The comparator hysteresis of the data slicer can be set to either 20mV or 40mV. Furthermore, the
data slicer hysteresis can be selected for only positive edges or both positive and negative edges.
4.2.1.10 Frequency Detection Tolerance
The Frequency Detection Tolerance can be tighter or more relaxed. For details please see the
datasheet.
4.2.1.11 Wakeup Pattern (Manchester)
Select a wakeup pattern here. Each field defines 4 bit. If the transmitted pattern matches the
selected pattern, a wakeup interrupt is generated at the WAKE pin. The WAKE pin goes high.

AS3930 Standard Board
ams Demo Kit Manual, Confidential
Page 10
[v1-02] 2014-Jul-10
Document Feedback
4.2.1.12 General Settings
AGC only on carrier burst: The automatic gain control is active 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. If AGC UP-DOWN is disabled the AGC can only decrease the
gain for the whole duration of the data reception. In this mode the system holds the RSSI peak.
4.2.1.13 Correlator
Enable correlator: If the correlator is enabled the chip searches first for the preamble bits and then
for the data pattern (Manchester encoded Wakeup Pattern). Should the pattern correlation be
disabled, the AS3930 goes directly in data receiving mode.
Single pattern: The wakeup pattern is sent as single string.
Double pattern: The wakeup pattern is doubled.
4.2.1.14 Symbol Rate
The Symbol Rate can be adjusted between 512 Symbols/s and 4096 Symbols/s. The symbol rate
defines the duration of one bit via the 32.768 kHz Clock in order to recover the data.
4.2.1.15 Artificial Wakeup
It is possible to enable the artificial wakeup with a period between 1s and 2 hours.
4.2.1.16 Clear Wake
The Clear Wake Button resets the WAKE pin manually.
4.2.1.17 Reset RSSI
Reset the current RSSI measurement.
4.3 Clear False Wakeup
The False Wakeup register counts the number of frequency detections that do not match the
wakeup pattern. The accumulated number of false wakeups can be reset via the Clear False
Wakeup button.
4.4 Description of the GUI for the Wake-up Transmitter Board
All adjustments that are made to the settings can be saved via “Store Settings” in the lower right
corner of the ‘Transmitter’ tab. The settings can be reset to the default configuration by pushing the
button “Restore Default Settings”.
Note: A possible Firmware Update can be done via Help/Firmware Update (Ctrl+F). Load the latest
*.bin file for the transmitter and update the firmware.