Würth TARVOS-II User manual

USER MANUAL
TARVOS-II
AMB8626 / 2607021181000
VERSION 4.4
MAY 19, 2023

***************
MUST READ
Check for firmware updates
Before using the product make sure you use the most recent firmware version, data sheet
and user manual. This is especially important for Wireless Connectivity products that were
not purchased directly from Würth Elektronik eiSos. A firmware update on these respective
products may be required.
We strongly recommend to include in the customer system design, the possibility for a firmware
update of the product.

WIRELESS CONNECTIVITY & SENSORS
User manual Tarvos-II
Revision history
Manual
version
FW
version
HW
version Notes Date
1.0 -
3.11
2.0 -
3.4.0 2.0 • Initial version June 2017
4.0 3.4.0 2.0 • New corporate design and
structure November 2018
4.1 3.5.0 2.0
• Added information on new
firmware in chapter Firmware
history
• Added chapter Reference design
• Added chapter Information for
explosion protection
February 2019
4.2 3.5.0 2.0
• Updated label in chapter General
labeling information
• Updated address of Division
Wireless Connectivity & Sensors
location
October 2019
4.3 3.5.0 2.0 • Updated the firmware update
chapter. June 2020
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4.4 3.5.0 2.0
• Removed 2607021181001 and
2607021181009 from Ordering
information as there are no
longer pre-cuts or non T&R
packages available. The modules
are available in all quantities as
cut tape.
• New corporate design.
May 2023
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Abbreviations
Abbreviation Name Description
ACK Acknowledgement Acknowledgement pattern confirming the reception of
the transmitted data packet.
CS Checksum
DC Duty cycle Transmission time in relation of one hour. 1% means,
channel is occupied for 36 seconds per hour.
FSE Field Sales
Engineer
Support and sales contact person responsible for
limited sales area
0xhh [HEX] Hexadecimal
All numbers beginning with 0x are stated as
hexadecimal numbers. All other numbers are
decimal.
HIGH High signal level
LOW Low signal level
LPM Low power mode Operation mode for reduced power consumption.
LRM Long range mode Tx mode increasing the RX sensitivity by using
spreading and forward error correction
LSB Least significant
bit
MSB Most significant bit
PL Payload The real, non-redundant information in a
frame/packet.
RF Radio frequency Describes everything relating to the wireless
transmission.
UART
Universal Asynchronous Receiver Transmitter allows
communicating with the module of a specific
interface.
US UserSettings
Any relation to a specific entry in the UserSettings is
marked in a special font and can be found in the
respective chapter.
VDD Supply voltage
Payload The real, non-redundant information in a frame/packet
User
settings
Any relation to a specific entry in the user settings is
marked in a special font and can be found in the
respective chapter
UART
Universal Asynchronous Receiver Transmitter, allows
to communicate with the module of a specific
interface.
Duty cycle Transmission time in relation of one hour 1% means,
channel is occupied for 36 seconds per hour.
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Hexadecimal
[HEX]
0xhh
All numbers beginning with 0x are stated as
hexadecimal numbers. All other numbers are
decimal.
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Contents
Overview of helpful application notes 11
1. Introduction 12
1.1. Operational description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.2. Blockdiagram..................................... 12
1.3. Orderinginformation................................. 13
2. Electrical specifications 14
2.1. Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.3. Powerconsumption.................................. 14
2.3.1. Static..................................... 15
2.4. Radiocharacteristics................................. 15
2.5. Pincharacteristics .................................. 15
2.6. Integrated flash characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3. Pinout 17
4. Quickstart 19
4.1. Minimal pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.2. Powerup ....................................... 19
4.3. Quickstartexample.................................. 20
5. Functional description 23
5.1. Operatingmodes................................... 23
5.1.1. Switching from transparent to command mode . . . . . . . . . . . . . . 23
5.1.2. Switching from command to transparent mode . . . . . . . . . . . . . . 23
5.1.3. Transparentmode.............................. 24
5.1.4. /RTS signal, module busy . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.1.5. Commandmode .............................. 25
5.2. Adopting parameters to fit your application . . . . . . . . . . . . . . . . . . . . . 25
5.3. Device addressing and wireless monitoring . . . . . . . . . . . . . . . . . . . . 25
6. Host connection 26
6.1. Serialinterface:UART................................ 26
7. The command interface 27
7.1. Overview ....................................... 27
7.2. Messageoverview .................................. 28
7.3. Data transfer & reception in the command mode . . . . . . . . . . . . . . . . . 30
7.3.1. CMD_DATA_REQ.............................. 30
7.3.1.1. Example1: ............................... 30
7.3.2. CMD_DATAEX_REQ ............................ 31
7.3.2.1. Example1: ............................... 31
7.3.3. CMD_DATAEX_IND............................. 32
7.3.3.1. Example1: ............................... 32
7.3.4. CMD_DATARETRY_REQ . . . . . . . . . . . . . . . . . . . . . . . . . 33
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7.3.5. CMD_REPEAT_IND ............................ 33
7.4. Requesting parameters and actions . . . . . . . . . . . . . . . . . . . . . . . . 35
7.4.1. CMD_FWRELEASE_REQ . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.4.1.1. Example1: ............................... 35
7.4.2. CMD_SERIALNO_REQ . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.4.3. CMD_RESET_REQ............................. 36
7.4.4. CMD_RSSI_REQ.............................. 36
7.4.4.1. Example1: ............................... 37
7.4.5. CMD_ERRORFLAGS_REQ . . . . . . . . . . . . . . . . . . . . . . . . 37
7.5. Modification of volatile parameters . . . . . . . . . . . . . . . . . . . . . . . . . 39
7.5.1. CMD_SET_MODE_REQ . . . . . . . . . . . . . . . . . . . . . . . . . . 39
7.5.2. Example1:.................................. 39
7.5.3. CMD_SET_PAPOWER_REQ . . . . . . . . . . . . . . . . . . . . . . . 40
7.5.3.1. Example1: ............................... 40
7.5.4. CMD_SET_CHANNEL_REQ . . . . . . . . . . . . . . . . . . . . . . . 40
7.5.4.1. Example1: ............................... 41
7.5.5. CMD_SET_DESTNETID_REQ . . . . . . . . . . . . . . . . . . . . . . 41
7.5.6. CMD_SET_DESTADDR_REQ . . . . . . . . . . . . . . . . . . . . . . . 42
7.6. Modification of non-volatile parameters . . . . . . . . . . . . . . . . . . . . . . . 43
7.6.1. CMD_SET_REQ .............................. 43
7.6.1.1. Example1: ............................... 44
7.6.1.2. Example2: ............................... 44
7.6.2. CMD_GET_REQ .............................. 45
7.6.2.1. Example1: ............................... 45
7.6.3. CMD_FACTORY_RESET_REQ . . . . . . . . . . . . . . . . . . . . . . 46
8. UserSettings - Module configuration values 47
8.1. Difference between volatile and non-volatile settings . . . . . . . . . . . . . . . 47
8.2. Modifying the UserSettings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
8.3. UART_PktMode.................................... 49
8.3.1. Example1:.................................. 49
8.3.2. Example2:.................................. 50
8.4. UART_PktSize .................................... 51
8.4.1. Example1:.................................. 51
8.4.2. Example2:.................................. 51
8.5. UART_RTSLimit ................................... 52
8.5.1. Example1:.................................. 52
8.5.2. Example2:.................................. 52
8.6. UART_ETXChar ................................... 53
8.6.1. Example1:.................................. 53
8.6.2. Example2:.................................. 53
8.7. UART_Timeout.................................... 54
8.7.1. Example1:.................................. 54
8.7.2. Example2:.................................. 54
8.8. UART_DIDelay .................................... 55
8.8.1. Example1:.................................. 55
8.8.2. Example2:.................................. 55
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8.9. MAC_NumRetrys................................... 56
8.9.1. Example1:.................................. 56
8.9.2. Example2:.................................. 56
8.10. MAC_AddrMode ................................... 57
8.10.1.Example1:.................................. 57
8.10.2.Example2:.................................. 58
8.11. MAC_NumRetrysCCA ................................ 59
8.11.1.Example1:.................................. 59
8.11.2.Example2:.................................. 59
8.12. MAC_CCARetryDelay ................................ 60
8.12.1.Example1:.................................. 60
8.12.2.Example2:.................................. 60
8.13. MAC_DefaultDestNetID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
8.13.1.Example1:.................................. 61
8.13.2.Example2:.................................. 61
8.14. MAC_DefaultDestAddrLSB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.14.1.Example1:.................................. 62
8.14.2.Example2:.................................. 62
8.15. MAC_DefaultSourceNetID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
8.15.1.Example1:.................................. 63
8.15.2.Example2:.................................. 63
8.16. MAC_DefaultSourceAddrLSB . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
8.16.1.Example1:.................................. 64
8.16.2.Example2:.................................. 64
8.17. MAC_ACKTimeout.................................. 65
8.17.1.Example1:.................................. 65
8.17.2.Example2:.................................. 65
8.18. PHY_PAPower .................................... 67
8.18.1.Example1:.................................. 67
8.18.2.Example2:.................................. 67
8.19. PHY_DefaultChannel................................. 69
8.19.1.Example1:.................................. 69
8.19.2.Example2:.................................. 69
8.20. PHY_CCAThr..................................... 70
8.20.1.Example1:.................................. 70
8.20.2.Example2:.................................. 70
8.21. OpMode........................................ 71
8.21.1.Example1:.................................. 71
8.21.2.Example2:.................................. 71
8.22. CfgFlags........................................ 72
8.22.1.Example1:.................................. 73
8.22.2.Example2:.................................. 73
8.23. RpFlags........................................ 74
8.23.1.Example1:.................................. 74
8.23.2.Example2:.................................. 75
8.24. RP_NumSlots..................................... 76
8.24.1.Example1:.................................. 77
8.24.2.Example2:.................................. 77
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8.24.3. UART_Baudrate: Configure the UART speed . . . . . . . . . . . . . . 78
8.24.4.Example1:.................................. 78
8.24.5.Example2:.................................. 78
8.25. UART_Databits.................................... 80
8.25.1.Example1:.................................. 80
8.25.2.Example2:.................................. 80
8.26. UART_Parity ..................................... 81
8.26.1.Example1:.................................. 81
8.26.2.Example2:.................................. 81
8.27. UART_Stoppbits ................................... 83
8.27.1.Example1:.................................. 83
8.27.2.Example2:.................................. 83
8.28. RF_ConfigIndex ................................... 84
8.28.1.Example1:.................................. 84
8.28.2.Example2:.................................. 85
8.29. RF_CCADisabled................................... 86
8.29.1.Example1:.................................. 86
8.29.2.Example2:.................................. 86
8.30. RF_CCACheckTime ................................. 88
8.30.1.Example1:.................................. 88
8.30.2.Example2:.................................. 88
9. Timing parameters 89
9.1. Resetbehavior .................................... 89
9.1.1. Power-onreset ............................... 89
9.1.2. Reset via /RESET pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
9.1.3. Reset as result of a serious error condition . . . . . . . . . . . . . . . . 89
9.2. Latencies when leaving the LPM . . . . . . . . . . . . . . . . . . . . . . . . . . 89
9.3. Latencies during data transfer / packet generation . . . . . . . . . . . . . . . . . 90
10.Radio parameters 91
11.Using the repeater functionality 97
11.1. Setup of the network and repeater device . . . . . . . . . . . . . . . . . . . . . 98
11.2. Examplenetwork................................... 99
11.3. Application in parallel networks . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
12.Battery powered operation 101
12.1. Activemode......................................101
12.2. Stand-bymode ....................................101
13.Custom firmware 102
13.1. Custom configuration of standard firmware . . . . . . . . . . . . . . . . . . . . 102
13.2. Customer specific firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
13.3. Customerfirmware..................................102
13.4. Contact for firmware requests . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
14.Firmware updates 104
14.1. Firmware flashing using the production interface . . . . . . . . . . . . . . . . . 104
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14.2. Update via ACC Software and UART . . . . . . . . . . . . . . . . . . . . . . . . 104
15.Firmware history 106
16.Design in guide 107
16.1. Advice for schematic and layout . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
16.2. Dimensioning of the micro strip antenna line . . . . . . . . . . . . . . . . . . . . 109
16.3. Antennasolutions ..................................110
16.3.1.Wireantenna ................................111
16.3.2.Chipantenna ................................111
16.3.3.PCBantenna ................................111
16.3.4. Antennas provided by Würth Elektronik eiSos . . . . . . . . . . . . . . 112
16.3.4.1. 2600130081 - Hyperion-I - 868 MHz dipole antenna . . . . . . . . 112
16.3.4.2. 2600130082 - Hyperion-II - 868 MHz magnetic base antenna . . . 113
17.Reference design 114
17.1. Schematic.......................................115
17.2. Layout.........................................117
18.Manufacturing information 118
18.1. Moisture sensitivity level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
18.2. Soldering .......................................118
18.2.1.Reflowsoldering ..............................118
18.2.2.Cleaning...................................120
18.2.3. Potting and coating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
18.2.4.Othernotations ...............................120
18.3. ESDhandling.....................................121
18.4. Safety recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
19.Physical specifications 123
19.1. Dimensions......................................123
19.2. Weight.........................................123
19.3. Moduledrawing....................................124
19.4. Footprint........................................125
19.5. Antennafreearea ..................................125
20.Marking 126
20.1. Lotnumber ......................................126
20.2. General labeling information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
21.Information for explosion protection 128
22.Regulatory compliance information 129
22.1. ImportantnoticeEU .................................129
22.2. Conformity assessment of the final product . . . . . . . . . . . . . . . . . . . . 129
22.3. Exemptionclause...................................129
22.4. EU Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
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23.Important notes 131
23.1. General customer responsibility . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
23.2. Customer responsibility related to specific, in particular safety-relevant appli-
cations.........................................131
23.3. Best care and attention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
23.4. Customer support for product specifications . . . . . . . . . . . . . . . . . . . . 131
23.5. Productimprovements................................132
23.6. Productlifecycle ...................................132
23.7. Propertyrights ....................................132
23.8. General terms and conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
24.Legal notice 133
24.1. Exclusionofliability..................................133
24.2. Suitability in customer applications . . . . . . . . . . . . . . . . . . . . . . . . . 133
24.3. Trademarks ......................................133
24.4. Usagerestriction ...................................133
25.License terms 135
25.1. Limitedlicense ....................................135
25.2. Usageandobligations ................................135
25.3. Ownership.......................................136
25.4. Firmwareupdate(s)..................................136
25.5. Disclaimer of warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
25.6. Limitationofliability..................................137
25.7. Applicable law and jurisdiction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
25.8. Severabilityclause ..................................137
25.9. Miscellaneous.....................................137
A. Additional CRC8 Information 140
A.1. Example CRC8 Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
A.2. CRC8TestVectors..................................140
B. Example codes for host integration 141
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Overview of helpful application notes
Application note ANR008 - Wireless Connectivity Software Development Kit
http://www.we-online.com/ANR008
To ease the integration of the Würth Elektronik eiSos radio modules into an application, Würth
Elektronik eiSos offers the corresponding Software Development Kit (SDK) for most commonly
used host processors. This SDK contains drivers and examples in C-code to communicate
with the corresponding radio module. This application note shows which SDKs are available
and describes how to download and use them.
Application note ANR010 - Range estimation
http://www.we-online.com/ANR010
This application note presents the two most used mathematical range estimation models, Friis
and two ray ground reflection, and its implementation in the range estimation tool of the RED-
EXPERT.
Application note ANR015 - From 868 MHz To 915 MHz
http://www.we-online.com/ANR015
Due to radio regulation laws in Europe and North America different frequencies are used in
the sub-GHz range for radio data transmission. Therefore Würth Elektronik eiSos offers each
product operating in the European 868 MHz range an counterpart operating in the American
915 MHz range. This application note shows which modules are comparable, where they differ
and what to consider when switching from 868 to 915 MHz and vice versa.
Application note ANR016 - Radio module migration guide
http://www.we-online.com/ANR016
Due to our long term availability policy Würth Elektronik eiSos offers beside radio modules
with most recent technology and chipset still the predecessor modules. This application note
describes what to consider when switching in between module generations.
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User manual Tarvos-II
1. Introduction
1.1. Operational description
The Tarvos-II is a radio sub module for wireless communication between devices such as
control systems, remote controls, sensors etc. It offers several radio configurations, address
modes and relieves the host system of radio-specific tasks such as
• checksum calculation,
• address resolution and
• repetition of addressed but unacknowledged telegrams (if enabled).
It can be deployed wherever the wireless exchange of data packets between two or more
parties is required. A serial interface (UART) whose data rate can be adjusted is available for
communicating with the host system.
1.2. Block diagram
Figure 1: Block diagram
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1.3. Ordering information
WE order code Former order code Description
2607021181000 AMB8626-TR Proprietary radio module 868MHz with antenna
pad, Tape & Reel
2607029281001 AMB8626-EV Evaluation kit for AMB8626 modules
2607056281001 AMB8665 USB dongle with AMB8626 module, SMA
antenna connector
Table 1: Ordering information
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2. Electrical specifications
As not otherwise stated measured on the evaluation board Tarvos-II-EV with T = 25°C, VCC =
3.3 V and 50 Ωconducted.
2.1. Recommended operating conditions
Description Min. Typ. Max. Unit
Ambient temperature -40 25 85 °C
Supply voltage (VDDS) 2.0 3.0 3.6 V
Table 2: Recommended operating conditions
2.2. Absolute maximum ratings
Description Min. Typ. Max. Unit
VCC -0.3 3.9 V
Level at any module IO pin -0.3 VCC+0.3, max 3.9 V
Output RF level 14 dBm
Input RF level 10 dBm
Table 3: Absolute maximum ratings
2.3. Power consumption
The transmit and receive currents are depending on the impedance matching,
and therefore may vary depending on antenna selection and matching.
A stable power supply is indispensable to ensure valid operating conditions for
the module. Releasing the /RESET pin before the VCC is stable may damage
the module permanently.
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A stable power supply and proper antenna design and matching is indispens-
able to achieve the stated radio characteristics.
2.3.1. Static
The stated current consumption is the sum of the CPU current and the radio current, depending
on the active radio mode.
Conditions: Tarvos-II-EV with T = 25 °C, VCC = 3.3 V, terminated unused module pads and
50 Ωconducted.
Description Min Typ. Max Unit
TX current consumption at max
output power 53 mA
RX current consumption 30 mA
Low power (LPM3), radio off,
UART via ACLK 3 µA
Table 4: Power consumption
2.4. Radio characteristics
Conditions: Tarvos-II-EV, T = 25 °C, VCC = 3.0 V, terminated unused module pads, 50 Ω
conducted
Description Min Typ. Max Unit
Max output power 14 14 dBm
Best input sensitivity -117 dBm
Frequencies 868 870 MHz
Table 5: Radio characteristics
2.5. Pin characteristics
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Property Min Typ. Max Unit
GPIO maximum current per pin 2 mA
GPIO maximum current over all 48 mA
Internal pull-up resistor 20 35 50 kΩ
Internal Pull-down resistor 20 35 50 kΩ
Table 6: Pin characteristics
2.6. Integrated flash characteristics
The integrated flash memory has only a limited number cycles. This number of flash cycles
has a guaranteed min. value of 10000 and a typical value of 100000.
Hosts shall implement methods to prevent their applications from excessively using flash cy-
cles. This can be achieved by always performing a CMD_GET_REQ before any CMD_SET_REQ and
other command that uses flash cycles.
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3. Pinout
GND
/RESET
RX_IND
TX_IND
/CTS
/DATA_IND
/RTS
URXD
VCC
ANT
UTXD
112
13
23
TRX_DIS
/CONFIG
/DATA_REQ
GND
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED RESERVED
Figure 2: Pinout
No Designation I/O Description
1ANT I/O Antenna connection, 50Ω
2GND Supply Ground
3VCC Supply Supply voltage
4UTXD Output UART TX (module transmission)
5URXD Input UART RX (module reception)
6/RTS Output
UART ready to send. HIGH level signalizes a busy
module UART buffer. While HIGH, all received
UART bytes will be discarded.
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WIRELESS CONNECTIVITY & SENSORS
User manual Tarvos-II
7/CTS Input
UART clear to send. HIGH signal indicates host
busy. Disabled by default.
If the pin function is disabled, connect it to
GND.
8/DATA_IND Output
Packet receive indication. Goes LOW as soon as a
valid packet with correct address is received via
radio, stays LOW for and additional UART_DIDelay
and remains LOW as long as the output via UART
continues.
9RESERVED Output Reserved. Do not connect.
10 RESERVED Output Reserved. Do not connect.
11 /DATA_REQUEST Input
A falling edge triggers the wireless transmission of
buffered data (transparent OpMode only). When
enabled this pin uses an internal pull-up resistor.
Can be disabled by CfgFlags .
If the pin function is disabled, connect it to
GND.
12 RESERVED Output Reserved. Do not connect.
13 RESERVED Output Reserved. Do not connect.
14 TRX_DISABLE Input
Switches the radio receive function off when a
HIGH level is applied.
The pin level must be hold LOW during the
module boot up.
Connect to GND if not needed.
15 /CONFIG Input
Switch the module’s OpMode on a falling edge
detection. Can be disabled by CfgFlags .
Connect to GND if function is disabled.
16 RESERVED Output Reserved. Do not connect.
17 TEST Debug Test Line. Do not connect.
18 RESERVED Output Reserved Do not connect.
19 /RESET Input
Module internal pull-up, a rising edge will release
module from reset, LOW will hold module in reset
state.
20 TX_INDICATE Output Shows radio activity, HIGH on radio TX. Can be
enabled by CfgFlags .
21 RX_INDICATE Output Shows radio activity, HIGH on radio RX. Can be
enabled by CfgFlags .
22 RESERVED Output Reserved. Do not connect.
23 GND Supply Ground
Table 7: Pinout
Order code 2607021181000 18
Version 4.4, May 2023 www.we-online.com/wcs