Wuerth Elektronik eiSos and Co KG AMB2524 AMB2524 User Manual Testreport ETS 300 335

AMBER Wireless GmbH AMB2524 Testreport ETS 300 335

Users Manual

Test report no. 17011091 Page 1 of 1 EUT: AMB2524 AMB2524-1 FCC ID: R7TAMB2524 FCC Title 47 CFR Part 15 Date of issue: 2017-12-06 Date: 2017-09-07 Created: P9 Controlled: P4 Released: P1 Vers. no. 1.17 m. dudde hochfrequenz-technik GmbH & Co. KG Rottland 5a 51429 Bergisch Gladbach/ Germany Tel: +49 2207-96890 Fax +49 2207-968920 Annex acc. to FCC Title 47 CFR Part 15 relating to AMBER wireless GmbH AMB2524 AMB2524-1 Annex no. 5 User Manual Functional Description Title 47 - Telecommunication Part 15 - Radio Frequency Devices Subpart C – Intentional Radiators ANSI C63.4-2014 ANSI C63.10-2013
Manual for AMB8420, AMB2524, AMB2561 Version 4.2 SW-V 3.4.0 AMBER wireless GmbH Phone +49.651.993.550 Email info@amber-wireless.de Internet www.amber-wireless.de
AMB8420_2524_2561_MA_V4_2 Page 2 of 61 Date: 12/2017 Table of Contents 1 Summary ................................................................................................................................ 6 2 Ordering Information ............................................................................................................. 6 3 Electrical parameters ............................................................................................................ 7 3.1 Input voltage ..................................................................................................................... 7 3.2 Power consumption .......................................................................................................... 7 3.2.1 AMB8420 ................................................................................................................... 7 3.2.2 AMB2524 ................................................................................................................... 7 4 Dimensions and weight ........................................................................................................ 7 5 Pinout ..................................................................................................................................... 8 6 Start-up and minimal configuration ................................................................................... 10 6.1 Minimal configuration ...................................................................................................... 10 6.2 Sending & Receiving: “Hello World” ................................................................................ 10 6.3 Adopting parameters to fit your application ..................................................................... 11 6.4 Deployment of several modules, use of addresses ......................................................... 11 7 Host connection: Serial interface ....................................................................................... 12 7.1 UART .............................................................................................................................. 12 7.1.1 Supported data rates ................................................................................................ 12 7.1.2 Supported data formats ............................................................................................ 12 8 Operating modes ................................................................................................................. 13 8.1 Switching from transparent to command mode ............................................................... 13 8.2 Switching from command to transparent mode ............................................................... 13 8.3 Transparent, buffered data transfer ................................................................................. 13 8.3.1 /RTS signal, busy processor ..................................................................................... 14 8.4 Command mode ............................................................................................................. 14 9 The command interface ...................................................................................................... 15 9.1 Data transfer & reception in the command mode ............................................................ 15 9.1.1 CMD_DATA_REQ .................................................................................................... 15 9.1.2 CMD_DATAEX_REQ ............................................................................................... 16 9.1.3 CMD_DATAEX_IND ................................................................................................. 16 9.1.4 CMD_DATARETRY_REQ ........................................................................................ 16 9.2 Requesting parameters and actions ................................................................................ 18 9.2.1 CMD_SERIALNO_REQ ........................................................................................... 18 9.2.2 CMD_RESET_REQ .................................................................................................. 18 9.2.3 CMD_RSSI_REQ ..................................................................................................... 18 9.2.4 CMD_ERRORFLAGS_REQ ..................................................................................... 20 9.3 Modification of volatile parameters .................................................................................. 21 9.3.1 CMD_SET_MODE_REQ .......................................................................................... 21 9.3.2 CMD_SET_CHANNEL_REQ .................................................................................... 21 9.3.3 CMD_SET_DESTNETID_REQ................................................................................. 21 9.3.4 CMD_SET_DESTADDR_REQ ................................................................................. 22 9.4 Modification of non-volatile parameters ........................................................................... 23 9.4.1 CMD_SET_REQ ...................................................................................................... 23 9.4.2 CMD_GET_REQ ...................................................................................................... 24 10 User settings ...................................................................................................................... 25 10.1 UART_CTL ................................................................................................................... 28 10.2 UART_TCTL ................................................................................................................. 28 10.3 UART_MCTL ................................................................................................................ 28 10.4 UART_BR0 ................................................................................................................... 28
AMB8420_2524_2561_MA_V4_2 Page 3 of 61 Date: 12/2017 10.5 UART_BR1 ................................................................................................................... 28 10.6 UART_PktMode ............................................................................................................ 28 10.7 UART_PktSize .............................................................................................................. 29 10.8 UART_RTSLimit ........................................................................................................... 29 10.9 UART_ETXChar ........................................................................................................... 29 10.10 UART_Timeout ........................................................................................................... 29 10.11 UART_DIDelay ........................................................................................................... 29 10.12 MAC_NumRetrys ........................................................................................................ 30 10.13 MAC_AddrMode ......................................................................................................... 30 10.14 MAC_DestNetID ......................................................................................................... 30 10.15 MAC_DestAddrLSB .................................................................................................... 30 10.16 MAC_SourceNetID ..................................................................................................... 31 10.17 MAC_SourceAddrLSB ................................................................................................ 31 10.18 MAC_ACKTimeout ...................................................................................................... 31 10.19 PHY_FIFOPrecharge .................................................................................................. 31 10.20 PHY_PAPower ............................................................................................................ 31 10.21 PHY_DefaultChannel .................................................................................................. 31 10.22 PHY_CCARSSILevel .................................................................................................. 32 10.23 OpMode ...................................................................................................................... 32 10.24 MSP_RSELx ............................................................................................................... 32 10.25 MSP_DCOCTL ........................................................................................................... 32 10.26 WOR_Prescaler .......................................................................................................... 32 10.27 WOR_Countdown ....................................................................................................... 32 10.28 WOR_RXOnTime ....................................................................................................... 32 10.29 CfgFlags ..................................................................................................................... 32 11 Device addressing and wireless monitoring ................................................................... 34 12 Radio parameters .............................................................................................................. 35 12.1 AMB8420 ...................................................................................................................... 35 12.1.1 "M" band ................................................................................................................. 35 12.2 AMB2524 ...................................................................................................................... 36 13 Battery powered operation ............................................................................................... 38 13.1 Active mode .................................................................................................................. 38 13.2 Stand-by ....................................................................................................................... 38 13.3 WOR mode ................................................................................................................... 38 13.4 Sleep mode ................................................................................................................... 38 14 Timing parameters ............................................................................................................ 39 14.1 Reset behaviour ............................................................................................................ 39 14.1.1 Power-on reset ....................................................................................................... 39 14.1.2 Reset via /RESET pin ............................................................................................. 39 14.2 Wake-up from the sleep mode ...................................................................................... 39 14.3 Latencies during data transfer / packet generation ........................................................ 39 15 Firmware update ................................................................................................................ 41 15.1 Update of earlier firmware versions (< 3.0.0) ................................................................. 41 16 Firmware history ............................................................................................................... 42 17 Manufacturing information ............................................................................................... 43 17.1 Footprint dimensioning proposal ................................................................................... 43 18 Design in Guide ................................................................................................................. 44 18.1 Advice for Schematic and Layout .................................................................................. 44 18.2 Dimensioning of the 50 Ohm microstrip ........................................................................ 46
AMB8420_2524_2561_MA_V4_2 Page 4 of 61 Date: 12/2017 18.3 Antenna solutions ......................................................................................................... 47 18.3.1 Lambda/4 radiator .................................................................................................. 47 18.3.2 Chip antenna .......................................................................................................... 47 18.3.3 PCB antenna .......................................................................................................... 47 19 Manufacturing information ............................................................................................... 48 20 References ......................................................................................................................... 49 21 Regulatory compliance information ................................................................................. 50 21.1 AMB8420 ...................................................................................................................... 50 21.1.1 Important notice ...................................................................................................... 50 21.1.2 EU Declaration of conformity AMB8420 .................................................................. 51 21.2 AMB2524 ...................................................................................................................... 52 21.2.1 Important notice ...................................................................................................... 52 21.2.2 EU Declaration of conformity AMB2524 .................................................................. 53 21.2.3 FCC Compliance statement AMB2524 & AMB2524-1 ............................................ 54 21.2.4 IC Compliance statement AMB2524 & AMB2524-1 ................................................ 54 21.2.5 FCC and IC Requirements to OEM integrators ....................................................... 54 21.2.6 AMB2524 & AMB2524-1 ......................................................................................... 55 21.3 AMB2561 ...................................................................................................................... 56 21.3.1 Important notice ...................................................................................................... 56 21.3.2 EU Declaration of conformity AMB2561 .................................................................. 57 21.3.3 FCC statement ....................................................................................................... 58 21.4 AMB2520-4 ................................................................................................................... 59 21.4.1 Important notice ...................................................................................................... 59 21.4.2 EU Declaration of conformity AMB2520-4 .............................................................. 60 22 Important information ....................................................................................................... 61 22.1 Exclusion of liability ....................................................................................................... 61 22.2 Trademarks ................................................................................................................... 61 22.3 Usage restriction ........................................................................................................... 61
AMB8420_2524_2561_MA_V4_2 Page 5 of 61 Date: 12/2017 Abbreviations CS Checksum DC Duty cycle Relative frequency reservation period
AMB8420_2524_2561_MA_V4_2 Page 6 of 61 Date: 12/2017 1 Summary The AMB8420/AMB2524 module was designed as a radio submodule for wireless communication between devices like controls, remote controls, sensors etc. It offers several addressing modes and relieves the host system of radio-specific tasks such as  checksum calculation,  address resolution and  repetition of unacknowledged telegrams. It can be deployed wherever the wireless exchange of small data packets (up to 128 bytes) between two or more parties is required. A serial interface (UART) whose data rate and format can be adjusted flexibly is available for communicating with the host system. By means of the Windows program "ACC", the HF data rate can be adjusted from 4.8 to 250 kbps. Thanks to its small size and the integrated antenna, the module can easily be installed in existing systems without any external circuits. 2 Ordering Information Item no. Description AMB2524 2.4 GHz RF module with integrated ceramic antenna AMB2524-TR AMB2524 on Tape & Reel, Reflow solderable, packing unit 400pcs AMB2524-1 2.4 GHz RF module with RF pin AMB2524-1-TR AMB2524-1 on Tape & Reel, Reflow solderable, packing unit 400pcs AMB2524-2 2.4 GHz RF module with U.Fl socket AMB2524-2-TR AMB2524-2 on Tape & Reel, Reflow solderable, packing unit 400pcs AMB8420 868 MHz RF module with integrated ceramic-antenna AMB8420-TR AMB8420 on Tape & Reel, Reflow solderable, packing unit 400pcs AMB8420-2 868 MHz RF module with RF pin AMB8420-2-TR AMB8420-2 on Tape & Reel, Reflow solderable, packing unit 400pcs
AMB8420_2524_2561_MA_V4_2 Page 7 of 61 Date: 12/2017 3 Electrical parameters 3.1 Input voltage The input voltage of the module ranges from 2.7 to 3.6 V. In order to ensure a constant processor frequency (and UART clock rate) over the entire voltage range, the clock rate is continuously readjusted on the basis of the available watch crystal. Voltage changes during the reception or output over the serial interface can result in a change of the clock rate between two characters. Caution: A clean supply voltage is needed for the module to function correctly. Using a 100 µF blocking capacitor close to the VCC pin is a useful measure (especially when using RS232 converters or clocked DC-DC converters). 3.2 Power consumption 3.2.1 AMB8420 See data sheet [4]. 3.2.2 AMB2524 See data sheet [5]. Caution: To minimize power consumption in Sleep Mode, the input signals of the module (/CONFIG, SLEEP, TRX_DISABLE und /DATA_REQUEST) must be set to the levels defined in Table 1. Open (floating) pins result in increased power consumption. 4 Dimensions and weight See data sheets [4] and [5].
AMB8420_2524_2561_MA_V4_2 Page 8 of 61 Date: 12/2017 5 Pinout Figure 1 Pinout Designation I/O Description VCC1 Supply Supply voltage GND Supply Ground UTXD Output Output serial interface URXD Input Input serial interface /RESET Input A low level on this pin performs a restart of the module. Internally, this pin is connected to VCC via a 100 kΩ pull-up resistor. Leave open if not needed. /CONFIG Input Used to switch the module to the command mode (falling edge). Alternatively, this can be done by means of a UART break signal. Connect to GND if not needed. The function can be disabled (see 10.29). SLEEP Input Activates the Sleep Mode (high level). Connect to GND if not needed. The function can be disabled (see 10.29). TRX_DISABLE Input Switches the HF part off (high level) as long as no data is to be sent. Connect to GND if not needed. The function can be disabled (see 10.29). /DATA_REQUEST Input Prompts the wireless transmission of the data received via the UART (falling edge). As long as no new data is received via UART or wireless transmission, the buffer content remains valid and can be resent by means of a new signal. Connect to GND if not needed. The function can be disabled (see 10.29). Without function in the command mode. 1 100µF blocking capacitor recommended between VCC and GND in close proximity to the module
AMB8420_2524_2561_MA_V4_2 Page 9 of 61 Date: 12/2017 /RTS Output Ready to send (active low). When /RTS is low, data can be received via UART. /RTS goes high as soon as the UART buffer is full or when the wireless reception of a telegram is detected. From this moment, all data coming in via UART will be ignored. Timeout after falling edge: 100 µs. /DATA_INDICATE Output Goes low as soon as a valid frame is received via wireless transmission and remains low as long as the output via UART continues. Can be used to prepare a "sleeping" host system for the output of data. The delay between the falling edge and the beginning of output via UART can be configured (see UART_DIDelay, 10.11). During the transmission process, this pin signals the successful acknowledgement of the wireless telegram (if such was requested, see MAC_NumRetrys, 10.12): in this case, /DATA_INDICATE is set to low before the falling edge of the /RTS pin and goes back high when new data is received via wireless transmission or UART, at the latest. RESERVED Currently not used. These pins must be left open (do not connect). Some of these pins are used for the optional SPI2 interface. N.C. Open, optional aerial connection; use only after consultation. Table 1 Pinout 2 An SPI interface can be implemented upon request.
AMB8420_2524_2561_MA_V4_2 Page 10 of 61 Date: 12/2017 6 Start-up and minimal configuration 6.1 Minimal configuration The following pins are required in the minimal configuration: VCC, GND, UTXD, and URXD. If the module is to be connected to a PC, a level converter (TTL to RS232 or USB) must be used. The development tools AMB8420-EV and AMB2524-EV provide both interfaces on-board. In the default configuration of the Firmware, all module inputs (SLEEP, TRX_DISABLE, /CONFIG, and /DATA_REQUEST) are activated and must be connected to GND if they are not to be used (see Table 1). The /RTS signal is recommended to be used by the host. 6.2 Sending & Receiving: “Hello World” Connect your pair of modules, EV-boards or USB-sticks with the PC as explained in chapter 6. Please make sure you have a minimum distance of 3 meters between the two modules or devices to avoid over modulation. When short distances are needed, you could reduce the PAPower to a minimum. When the connection to the PC is done, please use a terminal tool of your choice. For convenience we assume you selected the tool “hterm”. Select the two corresponding COM ports and open them with the right configuration (AMB2524: 38.4 kBaud 8n1, AMB8420: 9.6 kBaud 8n1). Enter the string “Hello World” into the input line of hterm and use the “ASend” button followed by pushing the “start” button to send the data once. This data will be received by the second module and shows up as received data in the second hterm instance. You may send any string of size 1 to 128 characters from one module to the other. You just used the so called “transparent mode” of the modules to send your data. The address mode that was used is “0”. Thus all radio frames are broadcasts that can be received by anyone
AMB8420_2524_2561_MA_V4_2 Page 11 of 61 Date: 12/2017 listening with an AMB8626 in default settings. The frame you send was generated using the timeout method. Besides the transparent mode, that is suited for transparent data transmission, the so called “command mode” allows both, the module configuration and the data transmission, using a predefined command interface (see chapter 8). 6.3 Adopting parameters to fit your application The non-volatile parameters (see chapter 9) can only be changed in the command mode by using the CMD_SET_REQ command. This command will need the following parameters:  memory position of the parameter  the new value that shall be applied to this parameter Furthermore, there are volatile settings that can be accessed by explicit commands for each parameter. All available commands are introduced in chapter 8. 6.4 Deployment of several modules, use of addresses Settings like the module address can only be modified in the command mode. Thus we recommend to permanently operate in command mode by setting the user settings parameter OpMode to the value of 0x10 (16). To use non-broadcast transmissions you need to adopt the following non-volatile settings:  MAC_AddrMode (mode 1 or 2 should be used depending on the number of addresses you need)  MAC_DefaultSourceAddrLSB as the local address for each device of your network, each member of the network will need an unique address. A value of 255 is invalid.  MAC_DefaultSourceNetID, as the local network address for each device of your network, each member of the network will need an unique address. A value of 255 is invalid. In command mode, the command CMD_DATAEX_REQ, that has the destination address as an own parameter, can be used to send your data to the specified address. A broadcast message can still be achieved when using 0xFF (255) for both destination address LSB and destination net ID.
AMB8420_2524_2561_MA_V4_2 Page 12 of 61 Date: 12/2017 7 Host connection: Serial interface 7.1 UART 7.1.1 Supported data rates The data rate is adjusted by directly configuring the respective registers of the utilised microprocessor (see UART_TCTL, UART_MCTL, UART_BR0, and UART_BR1; from 10.1). In this way, the data rate can be adjusted freely from 0.5 to 115200 baud. As the UART speed is derived from the speed of the utilised clock quartz, there may be variations of up to 0.5%. When using the PC program "ACC", the following data rates can be selected using the data rate calculator. With this selection, the three registers above are automatically set to the optimum value. The default baud rate of the module is 9600 (AMB8420) / 38400 (AMB2524). The output of characters on the serial interface takes place with secondary priority. For this reason, short interruptions may occur between the output of individual characters (e.g. in the event of an interrupt). 7.1.2 Supported data formats All data formats offered by the processor are supported:  7 or 8 bits  No, even, or odd parity  1 or 2 stop bits In ACC, the following data formats can be selected directly via the drop-down menu: 8n1, 8o1, 8e1, 8n2, 8o2, 8e2, 7n1, 7o1, 7e1, 7n2, 7o2, 7e2. The data format, too, can be set by directly configuring the respective microprocessor registers (see UART_CTL, 10.1). The default and recommended data format is 8 data bits, no parity, 1 stop bit ("8n1").
AMB8420_2524_2561_MA_V4_2 Page 13 of 61 Date: 12/2017 8 Operating modes The module can be used in the following operating modes: 1. Transparent mode (transparent data transmission) 2. Command mode (module configuration and data transmission using the predefined command interface) The operating mode after power-up can be configured by means of the OpMode parameter. By default, the module operates in transparent mode. Starting in the command mode, the module responds with a CMD_SET_MODE_CNF telegram. 8.1 Switching from transparent to command mode The command mode can be entered by applying a falling edge on the /CONFIG pin or when a break signal is detected on the UART. A break condition exists if the RX input of the module is kept low for at least 10 more bits after an absent stop bit. Detection of both the falling edge on the /CONFIG pin and of the break signal can be disabled using the user setting CfgFlags. The successful switchover is acknowledged by a CMD_SET_MODE_CNF telegram. The switchover can only occur when no data is being received by wireless transmission or UART interface (approximately 100 µs after /RTS goes low and indicates readiness). 8.2 Switching from command to transparent mode The transparent mode can be entered by applying a falling edge on the /CONFIG pin, by using the command CMD_SET_MODE_REQ or on detection of another break signal on the UART. Detection of both the falling edge on the /CONFIG pin and of the break signal can be disabled using the user setting CfgFlags. The successful switchover is acknowledged by a CMD_SET_MODE_CNF telegram. The switchover can only occur when no data is being received by wireless transmission or UART interface (approximately 100 µs after /RTS goes low and indicates readiness). 8.3 Transparent, buffered data transfer In this mode, data is received via the serial interface and initially buffered. As soon as a specific condition is met (see Table 2), the RF telegram is generated with a preamble, checksum, and address information (optional). The number of characters transmitted in the wireless telegram in addition to the actual payload data depends on the selected addressing method and the data rate, and varies between 12 and 16 bytes (packet overhead). If required, the RF telegram can be acknowledged by the recipient module (see 10.12). If no acknowledgement is received, the telegram will automatically be repeated upon expiry of a timeout (see 10.18). The buffer size at the UART interface is 128 bytes, i.e. the maximum size of transmitted data packets is 128 bytes (payload data only, without packet overhead). To initiate an RF transmission, several options are available, listed in Table 2.
AMB8420_2524_2561_MA_V4_2 Page 14 of 61 Date: 12/2017 Start Condition Description: Dependent usersettings Timeout Transmission starts if no new character is detected within a configurable time period after receiving a character via UART. The timeout is reset every time a new character is received. UART_Timeout UART_PktMode End-Of-Text-Character Transmission begins when the preconfigured character is transmitted via UART. UART_PktMode UART_ETXChar Fixed Packet Size Transmission starts when the preconfigured number of bytes is reached in the RX buffer of the UART. UART_PktSize UART_RTSLimit UART_PktMode /Data Request Pin The transmission starts as soon as a falling edge is detected on the /DATA_REQUEST pin. CfgFlags Table 2 Communication in transparent mode The UART_PktMode parameter (see 10.6) can be used to determine which of the listed combinations is to be used. Caution: As long as the receiver module is busy sending characters via the serial interface, wireless data reception is not possible. For example, this effect is noticeable when sending a long data packet and subsequently a short data packet. In this case, the receiver module may still be busy sending the first packet via UART, and the second packet may be lost. 8.3.1 /RTS signal, busy processor /RTS signalizes a busy UART buffer which means, when /RTS is set, no more UART bytes will be accepted nor processed. /RTS is set when any of the events in the prior chapter has occurred. 8.4 Command mode This operating mode primarily serves module configuration. The module acts as a slave and can be fully controlled by an external host using the commands of the command interface (see chapter 9). It can also be used for wireless transmission of payload data providing a feedback dependent on the transmission success.
AMB8420_2524_2561_MA_V4_2 Page 15 of 61 Date: 12/2017 9 The command interface In the command mode, communication with the module occurs in the form of predefined commands. These commands must be sent in telegrams according to the format described in Table 3. Start signal Command No. of data Data (var.) Checksum Table 3 Telegram format in the command mode Start signal: STX = 0x02 Command: One of the predefined commands according to section 14 (1 byte) No. of data: Specifies the number of data in the following field of variable length and is limited to 128 in order to prevent buffer overflow (1 byte) Data: Variable number of data or parameters (maximum 128 byte, LSB first) Checksum: XOR relation of the preceding fields including the start signal STX, i.e. 0x02 ^ command ^ no. of data ^ data byte 0 ... (1 byte) Using a specific command, data can also be sent via HF, i.e. the module can be operated entirely in the command mode. This is useful for realising quick channel changes, for example. If no new signal is received for UART_Timeout milliseconds (see 10.10) after receiving the STX signal, the unit will wait for a new start signal. 9.1 Data transfer & reception in the command mode This chapter describes the commands to directly control the module, particular the data transmission over the radio link (when the module is in the command mode). 9.1.1 CMD_DATA_REQ This command serves the simple data transfer in the command mode. Transmission takes place on the configured channel (see 9.3.2) to the previously parameterised destination address (see 9.3.3 and 9.3.4). This command is especially suitable for transmission on a point-to-point connection. The number of payload data bytes is limited to 128 in order to prevent buffer overflow. Format (limit 128 payload data bytes): 0x02 0x00 < number of payload data bytes > < payload data bytes > < CS > Return: 0x02 0x40 0x01 < status > < CS > Status: 0x00: ACK received, only possible if MAC_NumRetrys is not 0; see 10.12 0x01: no ACK received or requested
AMB8420_2524_2561_MA_V4_2 Page 16 of 61 Date: 12/2017 9.1.2 CMD_DATAEX_REQ This command serves data transfer in a network with several parties. Both the channel to use and the destination address (depending on the parameterised addressing mode) are specified along with the command. The number of payload data bytes is limited to 127, 126, or 125 in order to prevent buffer overflow. Format in addressing mode 0 (limit 127 payload data bytes): 0x02 0x01 < number of payload data bytes + 1 > < channel > < payload data bytes > < CS > Format in addressing mode 1 (limit 126 payload data bytes): 0x02 0x01 < number of payload data bytes + 2 > < channel > < destination address > < payload data bytes > < CS > Format in addressing mode 2 (limit 125 payload data bytes): 0x02 0x01 < number of payload data bytes + 3 > < channel > < destination network ID > < destination address > < payload data bytes > < CS > Return: 0x02 0x40 0x01 < status > < CS > Status: 0x00: ACK received, only possible if MAC_NumRetrys is not 0; see 10.12 0x01: no ACK received or requested 0x02: invalid channel selected 9.1.3 CMD_DATAEX_IND This telegram indicates the reception of data bytes and represents the counterpart to the commands CMD_DATA_REQ and CMD_DATAEX_REQ. Apart from the RX field strength (RSSI value), this telegram also specifies the sender address (depending on the parameterised addressing mode). Format in addressing mode 0 (maximum 127 bytes payload data): 0x02 0x81 < number of data bytes + 1 > < data bytes > < field strength > < CS > Format in addressing mode 1 (maximum 126 bytes payload data): 0x02 0x81 < number of data bytes + 2 > < sender address > < data bytes > < field strength > < CS > Format in addressing mode 2 (maximum 125 bytes payload data): 0x02 0x81 < number of data bytes + 3 > < sender network ID > < sender address > < data bytes > < field strength >< CS > Concerning the interpretation of the field strength, see 9.2.2. 9.1.4 CMD_DATARETRY_REQ This command relaunches the transmission of the data submitted earlier on with CMD_DATA_REQ or CMD_DATAEX_REQ. Thus, the data does not need to be transmitted again via the serial interface.
AMB8420_2524_2561_MA_V4_2 Page 17 of 61 Date: 12/2017 The buffered data is lost as soon as new data is sent via UART or data is received via wireless transmission. Format: 0x02 0x02 0x00 0x00 Return: 0x02 0x40 0x01 < status > < CS > Status: 0x00: ACK received, only possible if MAC_NumRetrys is not 0; see 10.12 0x01: no ACK received or requested 0x03: no data available (e.g., overwritten by wireless data reception)
AMB8420_2524_2561_MA_V4_2 Page 18 of 61 Date: 12/2017 9.2 Requesting parameters and actions This group includes all commands that will return read-only parameters or request actions in the module. 9.2.1 CMD_SERIALNO_REQ This command can be used to query the individual serial number of the module. Format: 0x02 0x0B 0x00 0x09 Return: 0x02 0x4B 0x04 < 4-byte serial number > < CS > Contrary to most other mulit-byte parameters this function returns MSB first. Which means that the first returned byte of the Serial number is the Product-ID (PID). Let’s imagine the 4-byte return value was “0x11 00 31 01” then the corresponding decimal serial number is (as printed on the label of the module): 017. 012545. The conversion will use PID 0x11 to create the decimal 17 with a prepended 0. Followed by 0x003101 which is 12545 in decimal. A “0” is prepended as the label is always using 6 decimal places for the second part of the serial number and 3 decimal places for the PID. 9.2.2 CMD_RESET_REQ This command triggers a software reset of the module. The reset is performed after the acknowledgement is issued. Format: 0x02 0x05 0x00 0x07 Return: 0x02 0x45 0x01 < status > < CS > Status: 0x00: success 9.2.3 CMD_RSSI_REQ This command delivers the current RX level determined by the transceiver IC in the form of a two's complement. Format: 0x02 0x0D 0x00 0x0F Return: 0x02 0x4D 0x01 < RX level > < CS > The value obtained in this way delivers the RX level RSSIdBm in dBm as follows: 1. Conversion of the hexadecimal value to a decimal RSSIdec 2. If RSSIdec  128: RSSIdBm = (RSSIdec –256) / 2 - RSSIOffset
AMB8420_2524_2561_MA_V4_2 Page 19 of 61 Date: 12/2017 3. Otherwise (RSSIdec < 128): RSSIdBm = RSSIdec / 2 - RSSIOffset RSSIOffset is a data-rate-dependent correction factor according to Table 4 (AMB8420) and Table 5 (AMB2524). The relation between the calculated value and the physical RX level in dBm is not linear across the entire operating range and is displayed in Figure 2 and Figure 3 . Data rate RSSI offset 1.2 kbps 74 38.4 kbps 74 250 kbps 78 Table 4 Data rate-dependent RSSI offset for AMB8420 (from [2]) Data rate RSSI offset 2.4 kbps 71 10 kbps 69 250 kbps 72 500 kbps 72 Table 5 Data rate-dependent RSSI offset for AMB2524 (from [3]) Figure 2 Relation between the RX level and the RSSI value read out for AMB8420 (from [2])
AMB8420_2524_2561_MA_V4_2 Page 20 of 61 Date: 12/2017 Figure 3 Relation between the RX level and the RSSI value read out for AMB2524 (from [3]) 9.2.4 CMD_ERRORFLAGS_REQ This command returns internal error states. Format: 0x02 0x0E 0x00 0x0C Return: 0x02 0x4E 0x02 < error flags MSB > < error flags LSB >< CS > An error flag return value of "0" indicates that no error has occurred. The value is set back after the query and in the event of a reset. The meaning of the error flags is not described in detail in this context.
AMB8420_2524_2561_MA_V4_2 Page 21 of 61 Date: 12/2017 9.3 Modification of volatile parameters This group contains all functions that will modify runtime settings while the module is running. These settings are all volatile and will be reset to defaults on a reset of the module. 9.3.1 CMD_SET_MODE_REQ This command is used to toggle the operating mode, e.g. to exit the command mode (this is currently the only application). The return value will also be used as a start up indication if OpMode is set to 0x10 or if a change of the mode using the /config pin was requested (when changing into command mode). Format: 0x02 0x04 0x01 < desired operating mode > < CS > Example (exit command mode): 0x02 0x04 0x01 0x00 0x07 Return: 0x02 0x44 0x01 < newly configured operating mode > < CS > Return for above example: 0x02 0x44 0x01 0x00 0x47 The following operating modes are defined:  Mode 0 (0x00): transparent data transfer  Mode 16 (0x10): command mode 9.3.2 CMD_SET_CHANNEL_REQ This command is used to toggle the wireless channel. Unlike the non-volatile parameter PHY_DefaultChannel (see 10.21), this is a volatile runtime parameter. Format: 0x02 0x06 0x01 < 1-byte channel > < CS > Example (selection of channel 108): 0x02 0x06 0x01 0x6C 0x69 Return: 0x02 0x46 0x01 < new channel > < CS > Return for above example: 0x02 0x46 0x01 0x6C 0x29 The number of the newly set channel is returned. If the permissible frequency range is exceeded, the lowest and highest permissible channels are configured and returned. 9.3.3 CMD_SET_DESTNETID_REQ This command serves to configure the destination network ID in addressing mode 2. Unlike the non-volatile parameter MAC_DestNetID, this is a volatile runtime parameter.
AMB8420_2524_2561_MA_V4_2 Page 22 of 61 Date: 12/2017 Format: 0x02 0x07 0x01 < 1-byte destination network ID > < CS > Return: 0x02 0x47 0x01 < status > < CS > Status: 0x00: success 9.3.4 CMD_SET_DESTADDR_REQ This command serves to configure the destination address in addressing modes 1 and 2. Unlike the non-volatile parameter MAC_DestAddrLSB (see 10.15), this is a volatile runtime parameter. Format: 0x02 0x08 0x01 < 1-byte destination address > < CS > Return: 0x02 0x48 0x01 < status> < CS > Status: 0x00: success
AMB8420_2524_2561_MA_V4_2 Page 23 of 61 Date: 12/2017 9.4 Modification of non-volatile parameters The non-volatile parameters are also called user settings and are stored in a special flash location. 9.4.1 CMD_SET_REQ This command enables direct manipulation of the parameters in the module’s non-volatile memory. The respective parameters are accessed by means of the memory position described in Table 6. Access outside these memory positions is not possible by means of this function. You can modify individual or multiple consecutive parameters in the memory at the same time. Parameters of 2 or more bytes have to be transferred LSB first. The list and description of all accessible non volatile parameters follows in chapter 9.4.2. A CMD_SET_REQ shall always be preceded by a CMD_GET_REQ to check whether any parameter needs a change. This is recommended to reduce the number erase-cycles on the flash which are as a matter of fact limited. Caution: The validity of the specified parameters is not verified. Incorrect values can result in device malfunction! Caution: To save the parameters in the flash memory of the module, the particular memory segment must first be flushed entirely and then restored from the RAM. If a reset occurs during this procedure (e.g. due to supply voltage fluctuations), the entire memory area may be destroyed. In this case, the module may no longer be operable, which means that the firmware must be re-installed via "ACC". Recommendation: First verify the configuration of the module with CMD_GET_REQ; write only if necessary. Format: 0x02 0x09 < number of bytes + 2 > < memory position > < number of bytes > < parameter > < CS > Return: 0x02 0x49 0x01 < status > < CS > Status: 0x00: success 0x01: invalid memory position (write access to unauthorised area > 79 / 0x4F) 0x02: invalid number of bytes to be written (write access to unauthorised area > 0x4F) Example 1: Setting the number of wireless retries (parameter MAC_NumRetrys, memory position 20 according to Table 6): 0x02 0x09 0x03 0x14 0x01 < MAC_NumRetrys > < CS > Example 2: Setting the 3 registers for the baud rate configuration (UART_MCTL, UART_BR0, and UART_BR1). According to Table 6, UART_MCTL has the memory position 2: 0x02 0x09 0x05 0x02 0x03 < UART_MCTL > < UART_BR0 > < UART_BR1 > < CS >
AMB8420_2524_2561_MA_V4_2 Page 24 of 61 Date: 12/2017 9.4.2 CMD_GET_REQ This command can be used to query individual or multiple non-volatile parameters (see 9.4). The requested number of bytes starting from the specified memory position are returned. You can query individual or multiple consecutive parameters in the memory at the same time. Parameters consisting of 2 or more bytes will typically be transferred LSB first order. Format: 0x02 0x0A 0x02 < memory position > < number of bytes > < CS > Example (query of all parameters): 0x02 0x0A 0x02 0x00 0x80 0x8A Return: 0x02 0x4A < number of bytes + 2 > < memory position > < number of bytes > < parameter > < CS > Write or Read access to the memory area after the parameters documented in Table 6 is blocked. The memory position and the number of bytes are limited accordingly. Thus, the last memory position that can be read out is 79 (0x4F).
AMB8420_2524_2561_MA_V4_2 Page 25 of 61 Date: 12/2017 10 User settings The non-volatile parameters listed in the following table can be modified by means of specific commands in the configuration mode (CMD_SET_REQ, see 9.4) of the module or by using the Windows software "ACC". These parameters are stored permanently in the module's flash memory. Caution: The validity of the specified parameters is not verified. Incorrect values can result in device malfunction! Designation Designation in ACC Summary Permissible values Default AMB8420 / AMB2524 Memory position Number of bytes UART_CTL Data format Control register for UART data format See description 16 0 1 UART_TCTL Control register for the baud rate (change only after consultation) 32 32 1 1 UART_MCTL MCTL Control register for fine-adjusting the UART baud rate; concerning the calculation, see [1] 0 - 255 0 / 68 2 1 UART_BR0 BR0 Prescaler for setting the baud rate (LSB); concerning the calculation, see [1] 0 - 255 113 / 156 3 1 UART_BR1 BR1 Prescaler for setting the baud rate (MSB); concerning the calculation, see [1] 0 - 255 2 / 0 4 1 UART_PktMode Packetizing mode Selects the packet generation method 0 or 1 0 5 1 UART_PktSize Packet size Number of characters for transmission start with set packet size 1 - 128 128 7 1 UART_RTSLimit /RTS limit Number of received characters after which /RTS responds 1 - 128 112 8 1 UART_ETXChar ETX character End-of-text character used to mark data packets; reception of this character triggers wireless transmission 0 - 255 10 9 1
AMB8420_2524_2561_MA_V4_2 Page 26 of 61 Date: 12/2017 Designation Designation in ACC Summary Permissible values Default AMB8420 / AMB2524 Memory position Number of bytes UART_Timeout Timeout Timeout after the last character before the data received via UART are transmitted via wireless transmission (in milliseconds) 0 – 65535 5 12 2 UART_DIDelay Data indication delay Delay between the signalling by the /DATA_INDICATION pin and the start of the output via UART 0 – 65535 0 14 2 MAC_NumRetrys Retrys Number of wireless retries 0 – 255 0 20 1 MAC_AddrMode Addressing mode Addressing mode to use 0/1/2 0 21 1 MAC_DestNetID Dest. net ID Default destination network ID 0 – 255 0 24 1 MAC_DestAddrLSB Dest. device address Default destination address (LSB) 0 – 255 0 25 1 MAC_SourceNetID Local net ID Own network ID 0 – 254 0 28 1 MAC_SourceAddrLSB Local device address Own address (LSB) 0 – 254 0 29 1 MAC_ACKTimeout ACK timeout Waiting time for wireless acknowledgement in milliseconds 0 – 65535 10 32 2 PHY_FIFOPrecharge FIFO precharge Fill level of the FIFO before the transmission is launched (change only after consultation) 8 – 64 8 40 1 PHY_PAPower PA power Transmission output; value range depends on HF configuration 0 - 255 195 3/ 255 41 1 PHY_DefaultChannel Default channel Utilised wireless channel after reset; value range depends on HF configuration 0 - 255 106 / 79 42 1 3 AMB8420 default 195, AMB8420-2 default 80
AMB8420_2524_2561_MA_V4_2 Page 27 of 61 Date: 12/2017 Designation Designation in ACC Summary Permissible values Default AMB8420 / AMB2524 Memory position Number of bytes PHY_CCARSSILevel CCA RSSI level Field strength level for "channel free" detection (not yet supported) 0 - 255 0 43 1 OpMode Mode Operating mode 0.16 0 60 1 MSP_RSELx DCO resistor sel. Start value for control loop DCO calibration after system reset (change only after consultation) 0 - 7 7 61 1 MSP_DCOCTL DCO control Start value for control loop DCO calibration after system reset (change only after consultation) 0 - 255 110 62 1 WOR_Prescaler Prescaler Duration of a wake-up cycle for periodic wake-ups in WOR mode 0 – 65535 4096 64 2 WOR_Countdown Countdown Number of wake-up cycles before waking up in WOR mode 0 – 65535 5 66 2 WOR_RXOnTime RX on time Duration of RX readiness in WOR mode 0 – 65535 1000 68 2 CfgFlags Configuration flags (hex.) Flags for setting various properties; see 10.29 0 – 65535 0 (0x0000) 72 2 Synch1 Synch1 Synch word MSB for transceiver (change only after consultation!) 0 - 255 211 76 1 Synch0 Synch0 Synch word LSB for transceiver (change only after consultation) 0 - 255 145 77 1 Table 6 Overview of non-volatile configuration parameters
AMB8420_2524_2561_MA_V4_2 Page 28 of 61 Date: 12/2017 10.1 UART_CTL The UART data format can be configured with the help of the upper 4 bits in this register. The meaning of these bits is described in Table 7. Bit no. Description 0 to 3 (0x0F) Reserved, must always be set to 0. 4 (0x10) If this bit is set, the character length will be 8 bits, if not, it will be 7 bits. 5 (0x20) This bit selects the number of stop bits. If this bit is set, 2 stop bits will be used, if not, 1 will be used. 6 (0x40) If this bit is set, even parity will be used, if not, odd parity will be used. This bit is only used if bit 7 is set to ‘1’. 7 (0x80) This bit enables the use of parity (if set). Table 7 Setting the data format 10.2 UART_TCTL This register selects the source for generating the UART clock speed. Currently, the only permissible value is 32. 10.3 UART_MCTL The registers UART_MCTL, UART_BR0, and UART_BR1 can be used to set the UART baud rate. Concerning the calculation of the corresponding settings, see [1]. 10.4 UART_BR0 The registers UART_MCTL, UART_BR0, and UART_BR1 can be used to set the UART baud rate. Concerning the calculation of the corresponding settings, see [1]. 10.5 UART_BR1 The registers UART_MCTL, UART_BR0, and UART_BR1 can be used to set the UART baud rate. Concerning the calculation of the corresponding settings, see [1] 10.6 UART_PktMode Selects the method used for generating packets for the transparent operating mode. Two methods have been implemented: 0. Mode 0: Sends when
AMB8420_2524_2561_MA_V4_2 Page 29 of 61 Date: 12/2017 a. the timeout defined with UART_Timeout is reached, or b. the number of bytes defined with UART_PktSize is reached, or c. the transmission of the data is requested by means of the /DATA_REQUEST pin. 1. Mode 1: Sends when a. the character defined with UART_ETXChar is detected, or b. the number of bytes defined with UART_PktSize has been received, or c. the transmission of the data is requested by means of the /DATA_REQUEST pin. Not used in the command mode. 10.7 UART_PktSize Maximum number of bytes after which the wireless transmission of the data received via UART starts. Used in packet mode 0 as well as in packet mode 1. Not used in the command mode. 10.8 UART_RTSLimit Number of bytes after which the host system is prompted to interrupt the data transfer over /RTS. Necessary, because an immediate response to the /RTS signal may not take place (UART FIFO), depending on the host system. 10.9 UART_ETXChar End-of-text character that triggers the transmission of the data received via UART. Only used in packet mode 1. During the wireless transmission, the ETX character is treated like a normal character. Not used in the command mode. 10.10 UART_Timeout Timeout in milliseconds after the last character has been received on UART before the wireless transmission of the data received via UART starts. Only used in packet mode 0. In command mode, start of transmission is triggered by the well defined end of the command. The parameters UART_Timeout is used in this case to define the maximum delay between two consecutive characters. If this delay is reached (after detection of the STX character), the input buffer will be flushed. 10.11 UART_DIDelay This parameter determines the delay in milliseconds between the signalling of incoming wireless data over the /DATA_INDICATION pin and the output of the data via UART. For example, this delay can be used to prepare a "sleeping" host system for receiving the data. From software version 3.2 also valid in the command mode.
AMB8420_2524_2561_MA_V4_2 Page 30 of 61 Date: 12/2017 10.12 MAC_NumRetrys Determines the maximum number of wireless transmission retries. If this parameter is set to a value other than 0, the receiver module will automatically be prompted to send a wireless acknowledgement. 10.13 MAC_AddrMode The following addressing modes are available: 1. No addressing (mode 0): Each module receives the transmitted HF telegram and delivers the received data to the host system via UART. No address information is transmitted in the wireless telegram. 2. 1-byte address (mode 1): The receiving module will only deliver the data to the host system via UART if the destination address configured at the sender (MAC_DestAddrLSB, see 10.15) corresponds to the source address (MAC_SourceAddrLSB, see 10.17) or the address 255 (broadcast address) was specified as destination address. Both the destination address and the source address are transmitted in the wireless telegram (total = 2 bytes). 3. 2-byte address (mode 2): The receiving module will only deliver the data to the host system via UART if both the destination network ID and the destination address correspond to the source addresses (MAC_SourceNetID and MAC_SourceAddrLSB, see 10.16 and 10.17) or the broadcast address 255 was specified as destination address. A total of 4 bytes of address information are transmitted in the wireless telegram. Caution: The receiver and transmitter modules must be operated in the same addressing mode! Caution: In addressing mode 0, the use of wireless acknowledgement may cause problems if several wireless modules are addressed simultaneously. In this case, all modules will simultaneously acknowledge the receipt of the package. Thus, the wireless acknowledgement cannot be received by the sending module due to the collision, and the maximum number of retries will be sent. 10.14 MAC_DestNetID Destination network address to use in addressing mode 2 after a reset. Can be modified with the command CMD_SET_DESTNETID_REQ at runtime (volatile). If the special broadcast ID and the broadcast address are set to 255, the sender will be received by all. 10.15 MAC_DestAddrLSB Destination address to use in addressing modes 1 and 2 after a reset. Can be modified with the command CMD_SET_DESTADDRESS_REQ at runtime (volatile). If the special broadcast
AMB8420_2524_2561_MA_V4_2 Page 31 of 61 Date: 12/2017 address is set to 255 (in the case of addressing mode 2, broadcast ID also 255), the sender will be received by all. 10.16 MAC_SourceNetID Source network ID in addressing mode 2. 10.17 MAC_SourceAddrLSB Source device address in addressing modes 1 and 2. 10.18 MAC_ACKTimeout Time to wait for a wireless acknowledgement before a wireless retry is triggered. The values are automatically set in "ACC" depending on the configured HF data rate. HF data rate ACK timeout recommended 1.2 kbps 85 ms 2.4 kbps 45 ms 4.8 kbps 25 ms 10.0 kbps 15 ms 38.4 kbps 8 ms 76.8 kbps 6 ms 100.0 kbps 5 ms 250.0 kbps 5 ms Table 8 Recommended timeouts 10.19 PHY_FIFOPrecharge Number of bytes that are stored in the transceiver FIFO before actual transmission is launched. Required to prevent a buffer underrun for HF baud rates of more than 200 kbps. The values are automatically set in "ACC" depending on the configured HF data rate. 10.20 PHY_PAPower HF output of the module. The maximum permissible output depends on the utilised HF configuration. The default value already represents the maximum possible output. 10.21 PHY_DefaultChannel Determines the wireless channel to use after a module reset.
AMB8420_2524_2561_MA_V4_2 Page 32 of 61 Date: 12/2017 10.22 PHY_CCARSSILevel Field strength used for "channel-free" detection (not implemented). 10.23 OpMode Operating mode to be used after power up. Modes 0 (transparent data transfer) and 16 (command mode) can be selected here. 10.24 MSP_RSELx Start value for a register used to set the processor speed. The speed is controlled continuously in the background. The frequency of the clock quartz is used for the calibration. The system start-up time can be optimised by means of a suitable configuration of this register (change only after consultation). 10.25 MSP_DCOCTL Start value for a register used to set the processor speed. The speed is controlled continuously in the background. The frequency of the clock quartz is used for the calibration. The system start-up time can be optimised by suitably configuring this register (change only after consultation). 10.26 WOR_Prescaler Defines the intervals in which the module in the sleep mode wakes up for a countdown (WOR_Countdown) until actual RX readiness. The interval (in seconds) is calculated as follows: 4096Pr_PrescalerWORTescaler  10.27 WOR_Countdown Number of prescaler cycles (countdown) until the module in the WOR mode enters the RX state. The duration until automatic RX readiness is calculated as follows: 4096Pr__ escalerWORNumCylesWORTWOR 10.28 WOR_RXOnTime Defines the duration in milliseconds for which the module in the WOR is RX-ready after waking up before it returns to the sleep mode. 10.29 CfgFlags 16-bit bit field in which the use of individual pins or signals can be disabled. Table 9 presents a description of the respective flags.
AMB8420_2524_2561_MA_V4_2 Page 33 of 61 Date: 12/2017 Bit no. Description 0 (0x0001) If this bit is set, the function of the /CONFIG pin will be disabled. Subsequently, the unit can no longer be switched to the command mode via this pin. 1 (0x0002) If this bit is set, the function of the /DATA_REQUEST pin will be disabled. Subsequently, data can no longer be sent using this pin. 2 (0x0004) If this bit is set, the detection of the break signal on the UART interface will be suppressed. Subsequently, the unit can no longer be switched to the command mode by means of such a signal. 3 (0x0008) If this bit is set, the status of the SLEEP and TRX_DISABLE pins will be ignored. Thus, the module can no longer be set to the various power-saving modes via these pins. 4 (0x0010) Reserved 5 (0x0020) If this bit is set, any character will be accepted as valid checksum in the command mode. 6 (0x0040) Reserved 7 (0x0080) If this bit is set, the address will not be resolved. The particular module can be used as packet sniffer to monitor a wireless link (from version 3.2). 9 to 15 (0xFF00) Reserved Table 9 Configuration flags Warning: If both bit 0 and bit 2 are set, the module can no longer be set to the configuration mode. In this case, access to the operating parameters is only possible with the "ACC" program.
AMB8420_2524_2561_MA_V4_2 Page 34 of 61 Date: 12/2017 11 Device addressing and wireless monitoring To connect several modules to networks or to send data to specific devices, the module supports the so called address mode. The corresponding user setting parameter MAC_AddrMode determines whether all modules in range, or all modules in a network or a single module with a fixed address is supposed to receive a certain message. The address resolution can be disabled ("packet sniffer") with bit 7 in the CfgFlags. A module configured in this way will receive all data packets and forward them to the serial interface, regardless of the addressing mode. In sniffer mode, the module does not send any acknowledgement.
AMB8420_2524_2561_MA_V4_2 Page 35 of 61 Date: 12/2017 12 Radio parameters The RF parameters (data rate, usable frequency range, etc.) can be configured with the PC program "ACC". Depending on the configured data rate, it can also be used to change additional non volatile parameters, e.g. MAC_ACKTimeout, PHY_DefaultChannel, or PHY_FIFOPrecharge. 12.1 AMB8420 The following sections describe the permissible data rates and frequency ranges. In the factory state, the HF data rate is 38.4 kbps. Caution: There is no interception mechanism concerning the duty cycle. The duty cycle is subject to regulations and is declared asratio expressed as a percentage of te cumulative duration of transmissions Ton_cum within an observation interval Tobs. DC = (Ton_cum/Tobs)Fobs on an observation bandwidth Fobs. Unless otherwise specified, Tobs is 1 hour and the observation bandwidth Fobs is the operational frequency band. Caution: Due to the changes in the Radio Directive the Occupied Channel Width has to be declared and a non overlapping channel spacing is required. This channel spacing equals the OCW, following table last column. 12.1.1 "M" band This frequency band ranges from 868.0 to 868.6 MHz (channel 100 to 112) and permits a 1% duty cycle. Channel no. \ data rate 100 101 102 103 104 105 106 107 108 109 110 111 112 OCW/ kHz 4.8 kbps 868.00 868.05 868.10 868.15 868.20 868.25 868.30 868.35 868.40 868.45 868.50 868.55 868.60 100 10 kbps 868.00 868.05 868.10 868.15 868.20 868.25 868.30 868.35 868.40 868.45 868.50 868.55 868.60 100 38.4 kbps 868.00 868.05 868.10 868.15 868.20 868.25 868.30 868.35 868.40 868.45 868.50 868.55 868.60 100 76.8 kbps 868.00 868.05 868.10 868.15 868.20 868.25 868.30 868.35 868.40 868.45 868.50 868.55 868.60 200 100 kbps 868.00 868.05 868.10 868.15 868.20 868.25 868.30 868.35 868.40 868.45 868.50 868.55 868.60 250 Table 10 Channel table "M" band. Permissible channels are highlighted in green Caution: The maximum permitted output power for the AMB8420 corresponds to the maximum possible PHY_PAPower setting. The maximum allowable output power for the AMB8420-2 is 0 dBm. Depending on the applied antenna other values may be allowable. Determining is the effective radiated power.
AMB8420_2524_2561_MA_V4_2 Page 36 of 61 Date: 12/2017 12.2 AMB2524 In the factory state, the HF data rate is 250 kbps. The module AMB2524 uses a channel spacing of approximately 500 kHz; the carrier frequency can be determined with the following formula: )500.0(5.2400][  ChannelC NMHzF Here, the channels 0 to 165 are permissible. See Table 11 for an overview of usable frequencies. Caution: Avoid the channels/frequencies (2405 MHz + n x 13MHz) marked in red, which merely provide a reduced range due to a property of the wireless IC. Channel no. Freq. [MHz] Channel no. Freq. [MHz] Channel no. Freq. [MHz] Channel no. Freq. [MHz] 0 2400.5 41 2421.0 82 2441.5 123 2462.0 1 2401.0 42 2421.5 83 2442.0 124 2462.5 2 2401.5 43 2422.0 84 2442.5 125 2463.0 3 2402.0 44 2422.5 85 2443.0 126 2463.5 4 2402.5 45 2423.0 86 2443.5 127 2464.0 5 2403.0 46 2423.5 87 2444.0 128 2464.5 6 2403.5 47 2424.0 88 2444.5 129 2465.0 7 2404.0 48 2424.5 89 2445.0 130 2465.5 8 2404.5 49 2425.0 90 2445.5 131 2466.0 9 2405.0 50 2425.5 91 2446.0 132 2466.5 10 2405.5 51 2426.0 92 2446.5 133 2467.0 11 2406.0 52 2426.5 93 2447.0 134 2467.5 12 2406.5 53 2427.0 94 2447.5 135 2468.0 13 2407.0 54 2427.5 95 2448.0 136 2468.5 14 2407.5 55 2428.0 96 2448.5 137 2469.0 15 2408.0 56 2428.5 97 2449.0 138 2469.5 16 2408.5 57 2429.0 98 2449.5 139 2470.0 17 2409.0 58 2429.5 99 2450.0 140 2470.5 18 2409.5 59 2430.0 100 2450.5 141 2471.0 19 2410.0 60 2430.5 101 2451.0 142 2471.5 20 2410.5 61 2431.0 102 2451.5 143 2472.0 21 2411.0 62 2431.5 103 2452.0 144 2472.5 22 2411.5 63 2432.0 104 2452.5 145 2473.0 23 2412.0 64 2432.5 105 2453.0 146 2473.5 24 2412.5 65 2433.0 106 2453.5 147 2474.0 25 2413.0 66 2433.5 107 2454.0 148 2474.5 26 2413.5 67 2434.0 108 2454.5 149 2475.0 27 2414.0 68 2434.5 109 2455.0 150 2475.5 28 2414.5 69 2435.0 110 2455.5 151 2476.0 29 2415.0 70 2435.5 111 2456.0 152 2476.5 30 2415.5 71 2436.0 112 2456.5 153 2477.0 31 2416.0 72 2436.5 113 2457.0 154 2477.5 32 2416.5 73 2437.0 114 2457.5 155 2478.0
AMB8420_2524_2561_MA_V4_2 Page 37 of 61 Date: 12/2017 Channel no. Freq. [MHz] Channel no. Freq. [MHz] Channel no. Freq. [MHz] Channel no. Freq. [MHz] 33 2417.0 74 2437.5 115 2458.0 156 2478.5 34 2417.5 75 2438.0 116 2458.5 157 2479.0 35 2418.0 76 2438.5 117 2459.0 158 2479.5 36 2418.5 77 2439.0 118 2459.5 159 2480.0 37 2419.0 78 2439.5 119 2460.0 160 2480.5 38 2419.5 79 2440.0 120 2460.5 161 2481.0 39 2420.0 80 2440.5 121 2461.0 162 2481.5 40 2420.5 81 2441.0 122 2461.5 163 2482.0 164 2482.5 165 2483.0 Table 11 Frequency assignment AMB2524
AMB8420_2524_2561_MA_V4_2 Page 38 of 61 Date: 12/2017 13 Battery powered operation By way of the SLEEP and TRX_DISABLE pins, the module can be set to various power-saving operating states. These states are described below. Table 12 presents an overview of the available options. TRX_DISABLE low TRX_DISABLE high SLEEP low Active mode, wireless and UART communication possible Stand-by, only UART communication possible SLEEP high WOR mode, module wakes up and is ready to receive Sleep mode, neither UART nor wireless communication possible Table 12 Power consumption control 13.1 Active mode In this operating state, the module is permanently ready to receive and forward data via UART or wireless transmission. The module will only switch to one of the other power-saving modes after processing any pending data transmission, i.e. /RTS must be low. 13.2 Stand-by In this operating state, the module's transceiver is disabled. Wireless reception is not possible, but transmission of data is possible. 13.3 WOR mode The module automatically wakes up at configurable intervals and remains ready to receive for a configurable time. In this connection, refer to the parameters WOR_Prescaler, WOR_Countdown, and WOR_RXOnTime (from 10.26). 13.4 Sleep mode This is the module state with the lowest power consumption. Wireless and UART communication are not possible. The module switches to one of the other operating modes when it detects a falling edge on the SLEEP pin. Concerning the power consumption in this operating mode, refer to the note in section 0.
AMB8420_2524_2561_MA_V4_2 Page 39 of 61 Date: 12/2017 14 Timing parameters 14.1 Reset behaviour Following a reset, a low level on the /RTS pin signals that the module is ready for operation. However, the level is only valid after the time required for the internal initialisation of the processor (a couple of µs). After this initialisation, /RTS is first set to high. Then the processor rate is calibrated on the basis of the watch crystal. Only after this procedure is the module ready for operation. 14.1.1 Power-on reset After setting the supply voltage and releasing the /RESET pin (if wired), the period until the module is ready for operation greatly depends on the build time of the clock quartz. This procedure may take up to 1 second; typical values range from 200 to 400 ms. Recommended procedure: Check for low level on /RTS pin 2 ms after setting the prescribed supply voltage. Subsequently, an additional 100 µs is required until readiness. 14.1.2 Reset via /RESET pin To force a module restart by means of the /RESET pin, it must first be set to low for at least 10 ms. After the pin is released, /RTS will switch to high after 100 µs at the latest. As the build-up time for the clock quartz does not apply in this case, the time until the module is ready for operation is reduced to a couple of ms. During this time, the processor rate will be calibrated, which takes anywhere between 2 and 20 ms depending on the supply voltage and temperature. Recommended procedure: After the /RESET pin is released, wait for 2 ms for low level on the /RTS pin. Subsequently, an additional 100 µs are required until readiness. 14.2 Wake-up from the sleep mode The switch-over to and from the sleep mode is also acknowledged via the /RTS signal. Recommended procedure: After the SLEEP pin is released, wait for low level on the /RTS pin. Subsequently, an additional 100 µs are required until readiness. 14.3 Latencies during data transfer / packet generation The data transfer is always buffered, i.e. data received via UART is buffered in the module until a specific event (see Table 2) occurs. Subsequently, the UART reception is interrupted (flow control with /RTS signal), and the payload data is passed to the internal memory of the wireless transceiver (FIFO). The wireless transmission starts as soon as the first data is available in the transceiver memory; during the ongoing wireless transmission, the remaining payload data is transmitted piece by piece. On the receiver side, the FIFO is read as soon as an incoming packet is detected.
AMB8420_2524_2561_MA_V4_2 Page 40 of 61 Date: 12/2017 In combination with a suitable packet generation method, this procedure enables the minimisation of the latencies resulting from buffering.
AMB8420_2524_2561_MA_V4_2 Page 41 of 61 Date: 12/2017 15 Firmware update The firmware of the module can be updated with the PC utility "ACC" via the serial interface. If the module is not connected to a PC, the UART of the module should be made accessible, e.g. by means of suitable connectors. Only the UTDX and URXD signals are needed for this procedure. A level converter (TTL to RS232) is required for PC connection. 15.1 Update of earlier firmware versions (< 3.0.0) To update firmware versions prior to 3.0.0, activate the option "Update factory settings" when using "ACC". This approach ensures that the new parameters added to the factory settings of the module are also overwritten. See Figure 4. Figure 4 Firmware update for versions < 3.0.0
AMB8420_2524_2561_MA_V4_2 Page 42 of 61 Date: 12/2017 16 Firmware history Version 3.0  Product release Version 3.1  Bug fix "break detection" Version 3.2  Bug fix UART_DIDelay in command mode  Sniffer mode via CfgFlags
AMB8420_2524_2561_MA_V4_2 Page 43 of 61 Date: 12/2017 17 Manufacturing information 17.1 Footprint dimensioning proposal Figure 5 Dimensional drawing AMB8420 Figure 6 Dimensional drawing AMB2524 Figure 7 Proposal for footprint Dimensions in mm. When designing the carrier board layout for AMB8420/AMB2524 the following must be taken into consideration:  As shown in Figure 7, avoid having any ground or metal in the ceramic antenna area (none at all on the right side and at least 10 mm distance above if it cannot be avoided).  The top layer of the carrier board should be kept free of tracks/vias underneath the AMB8420/AMB2524, as it is merely coated with solder mask (unspecified insulation properties) and the bottom of the AMB8420/AMB2524 has uncovered vias.  Tracks should only be laid under the AMB8420 in multi-layer structures in which layer 2 serves as ground layer that shields the underlying layers. Caution: If the spacing of 12 mm between the pad rows is not complied with, there will be a substantial short-circuit risk of VCC against GND! Caution: The not described Pads, three Pads underneath the AMB8420 and the Pad at the AMB2524 facing away from the antenna are only for manufacturing process and must not be connected.
AMB8420_2524_2561_MA_V4_2 Page 44 of 61 Date: 12/2017 18 Design in Guide 18.1 Advice for Schematic and Layout For users with less RF experience it is advisable to closely copy the relating evaluation board with respect to schematic and layout, as it is a proven design. The layout should be conducted with particular care, because even small deficiencies could affect the radio performance and its range or even the conformity. The following general advice should be taken into consideration:  A clean power supply is strongly recommended. Interference, especially oscillation can severely restrain range and conformity.  Variations in voltage level should be avoided.  LDOs, properly designed in, usually deliver a proper regulated voltage.  Blocking capacitors and a ferrite bead in the power supply line can be included to filter and smoothen the supply voltage when necessary. No fixed values can be recommended, as these depend on the circumstances of the application (main power source, interferences etc.). Frequently switching the module on and off, especially with a slowly changing voltage level of the power supply, can lead to erratic behavior, in rare cases even as far as damaging the module or the firmware. The use of an external reset IC can solve this matter.  Elements for ESD protection should be placed on all Pins that are accessible from the outside and should be placed close to the accessible area. For example, the RF-Pin is accessible when using an external antenna and should be protected.  ESD protection for the antenna connection must be chosen such as to have a minimum effect on the RF signal. For example, a protection diode with low capacitance such as the LXES15AAA1-100 or a 68 nH air-core coil connecting the RF-line to ground give good results.  Placeholders for optional antenna matching or additional filtering are recommended.  The antenna path should be kept as short as possible. Again, no fixed values can be recommended, as they depend on the influencing circumstances of the application (antenna, interferences etc.).
AMB8420_2524_2561_MA_V4_2 Page 45 of 61 Date: 12/2017 Figure 8: Layout  To avoid the risk of short circuits and interference there should be no routing underneath the module on the top layer of the baseboard. On the second layer, a ground plane is recommended, to provide good grounding and shielding to any following layers and application environment.  In case of integrated antennas it is required to have areas free from ground. This area should be copied from the evaluation board.  The area with the integrated antenna must overlap with the carrier board and should not protrude, as it is matched to sitting directly on top of a 1.5 mm thick PCB.  Modules with integrated antennas should be placed with the antenna at the edge of the main board. It should not be placed in the middle of the main board or far away from the edge. This is to avoid tracks beside the antenna.  Filter and blocking capacitors should be placed directly in the tracks without stubs, to achieve the best effect.  Antenna matching elements should be placed close to the antenna / connector, blocking capacitors close to the module.  Ground connections for the module and the capacitors should be kept as short as possible and with at least one separate through hole connection to the ground layer.  ESD protection elements should be placed as close as possible to the exposed areas. Figure 9: Placement of the module with integrated antenna
AMB8420_2524_2561_MA_V4_2 Page 46 of 61 Date: 12/2017 18.2 Dimensioning of the 50 Ohm microstrip The antenna track has to be designed as a 50 Ohm feed line. Figure 10 Dimensioning the antenna feed line as micro strip The width W for a micro strip can be calculated using the following equation:   metTeHWr8741.15098.525.1 Equation 1 Parameters of the antenna feeding line Example: a FR4 material with r = 4.3, a height H = 1000 µm and a copper thickness of Tmet= 18 µm will lead to a trace width of W ~ 1.9 mm. To ease the calculation of the Microstrip line (or e.g. a coplanar) many calculators can be found in the internet.  As rule of thumb a distance of about 3 x W should be observed between the micro strip and other traces / ground.  The Microstrip refers to ground, therefore there has to be the ground plane underneath the trace.  Keep the feeding line as short as possible.
AMB8420_2524_2561_MA_V4_2 Page 47 of 61 Date: 12/2017 18.3 Antenna solutions There exist several kinds of antennas, which are optimized for different needs. Chip antennas are optimized for minimal size requirements but at the expense of range, PCB antennas are optimized for minimal costs, and are generally a compromise between size and range. Both usually fit inside a housing. Range optimization in general is at the expense of space. Antennas that are bigger in size, so that they would probably not fit in a small housing, are usually equipped with a RF connector. A benefit of this connector may be to use it to lead the RF signal through a metal plate (e.g. metal housing, cabinet). As a rule of thumb a minimum distance of Lambda/10 (3.5 cm @ 868 MHz, 1.2 cm @ 2.44 GHz) from the antenna to any other metal should be kept. Metal placed further away will not directly influence the behavior of the antenna, but will anyway produce shadowing. Keep the antenna away from large metal objects as far as possible to avoid electromagnetic field blocking. In the following chapters, some special types of antenna are described. 18.3.1 Lambda/4 radiator An effective antenna is a Lambda/4 radiator. The simplest realization is an 8.6 cm long piece of wire for 868 MHz, respectively a 3.1 cm long piece of wire for 2.44 GHz. This radiator needs a ground plane at its feeding point. Ideally, it is placed vertically in the middle of the ground plane. As this is often not possible because of space requirements, a suitable compromise is to bend the wire away from the PCB respective to the ground plane. The Lambda/4 radiator has approximately 40 Ohm input impedance, therefore matching is not required. 18.3.2 Chip antenna There are many chip antennas from various manufacturers. The benefit of a chip antenna is obviously the minimal space required and reasonable costs. However, this is often at the expense of range. For the chip antennas, reference designs should be followed as closely as possible, because only in this constellation can the stated performance be achieved. 18.3.3 PCB antenna PCB antenna designs can be very different. The special attention can be on the miniaturization or on the performance. The benefits of the PCB antenna are their small / not existing (if PCB space is available) costs, however the evaluation of a PCB antenna holds more risk of failure than the use of a finished antenna. Most PCB antenna designs are a compromise of range and space between chip antennas and connector antennas.
AMB8420_2524_2561_MA_V4_2 Page 48 of 61 Date: 12/2017 19 Manufacturing information  The assembly contains moisture sensitive devices of the MSL classification 3. Only the dry packed Tape & Reel devices are suitable for the immediate processing in a reflow process.  Further information concerning the handling of moisture sensitive devices, (e.g. drying) can be obtained from the IPC/ JEDEC J-STD-033.  Recommendations for the temperature profile for the soldering furnace cannot be made, as it depends on the substrate board, the number and characteristics of the components, and the soldering paste used (consult your EMS). Fehler! Verweisquelle konnte nicht gefunden werden.The following figure shows a soldering curve that had been used for a 31 cm2 carrier board for single-side assembly. Figure 11 Example of a temperature profile Caution: Must be adjusted to the characteristics of the carrier board! To ensure the mechanical stability of the modules it is recommended to solder all pads of the module to the base board, even if they are not used for the application. Caution! ESD sensitive device. Care should be taken when handling the device in order to prevent permanent damage. MSL 3 Caution! This assembly contains moisture sensitive components. Care should be taken when processing the device according to IPC/JEDEC J-STD-033. Since the module itself is not fused the voltage supply shall be fed from a limited power source according to clause 2.5 of EN 60950-1.
AMB8420_2524_2561_MA_V4_2 Page 49 of 61 Date: 12/2017 20 References [1] To calculate the baud rate registers UART_MCTL, UART_BR0, and UART_BR1, the "Baud Rate Calculator" tool is integrated in ACC. To configure a standard baud rate, ACC provides a drop-down field with automatic calculation and parameterisation of the baud rate registers. [2] "CC1101 Single-Chip Low-Cost Low-Power RF Transceiver (Rev. B)", Texas Instruments [3] "CC2500 Single-Chip Low-Cost Low-Power RF Transceiver (Rev. B)", Texas Instruments [4] "AMB8420 Data Sheet", AMBER wireless GmbH [5] "AMB2524 Data Sheet", AMBER wireless GmbH
AMB8420_2524_2561_MA_V4_2 Page 50 of 61 Date: 12/2017 21 Regulatory compliance information 21.1 AMB8420 21.1.1 Important notice The use of RF frequencies is limited by national regulations. The AMB8420 has been designed to comply with the Radio Equipment Directive 2014/53/EU of the European Union (EU). The AMB8420 can be operated without notification and free of charge in the area of the European Union. However, according to the RED, restrictions (e.g. in terms of duty cycle or maximum allowed RF power) may apply. Conformity assessment of the final product The AMB8420 is a subassembly. It is designed to be embedded into other products (products incorporating the AMB8420 are henceforward referred to as "final products"). It is the responsibility of the manufacturer of the final product to ensure that the final product is in compliance with the essential requirements of the European Radio Equipment Directive. The conformity assessment of the subassembly AMB8420 carried out by AMBER wireless GmbH does not replace the required conformity assessment of the final product in accordance to the RED. Exemption clause Relevant regulation requirements are subject to change. AMBER wireless GmbH does not guarantee the accuracy of the before mentioned information. Directives, technical standards, procedural descriptions and the like may be interpreted differently by the national authorities. Equally, the national laws and restrictions may vary with the country. In case of doubt or uncertainty, we recommend that you consult with the authorities or official certification organizations of the relevant countries. AMBER wireless GmbH is exempt from any responsibilities or liabilities related to regulatory compliance.
AMB8420_2524_2561_MA_V4_2 Page 51 of 61 Date: 12/2017 21.1.2 EU Declaration of conformity AMB8420
AMB8420_2524_2561_MA_V4_2 Page 52 of 61 Date: 12/2017 21.2 AMB2524 21.2.1 Important notice The use of RF frequencies is limited by national regulations. The AMB2524 has been designed to comply with the Radio Equipment Directive 2014/53/EU of the European Union (EU). The AMB2524 can be operated without notification and free of charge in the area of the European Union. However, according to the RED, restrictions (e.g. in terms of duty cycle or maximum allowed RF power) may apply. The AMB2524 has been designed to comply with the FCC and IC. The AMB2524 can be operated without notification and free of charge in the area of USA and Canada. Conformity assessment of the final product The AMB2524 is a subassembly. It is designed to be embedded into other products (products incorporating the AMB2524 are henceforward referred to as "final products"). It is the responsibility of the manufacturer of the final product to ensure that the final product is in compliance with the essential requirements of the European Radio Equipment Directive, FCC and IC. The conformity assessment of the subassembly AMB2524 carried out by AMBER wireless GmbH does not replace the required conformity assessment of the final product in accordance to the RED. Exemption clause Relevant regulation requirements are subject to change. AMBER wireless GmbH does not guarantee the accuracy of the before mentioned information. Directives, technical standards, procedural descriptions and the like may be interpreted differently by the national authorities. Equally, the national laws and restrictions may vary with the country. In case of doubt or uncertainty, we recommend that you consult with the authorities or official certification organizations of the relevant countries. AMBER wireless GmbH is exempt from any responsibilities or liabilities related to regulatory compliance.
AMB8420_2524_2561_MA_V4_2 Page 53 of 61 Date: 12/2017 21.2.2 EU Declaration of conformity AMB2524
AMB8420_2524_2561_MA_V4_2 Page 54 of 61 Date: 12/2017 21.2.3 FCC Compliance statement AMB2524 & AMB2524-1 FCC ID: R7TAMB2524 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. (FCC 15.19) Modifications (FCC 15.21) Caution: Changes or modifications for this equipment not expressly approved by AMBER wireless may void the FCC authorization to operate this equipment. 21.2.4 IC Compliance statement AMB2524 & AMB2524-1 Certification Number: 5136A- AMB2524 This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement. 21.2.5 FCC and IC Requirements to OEM integrators This module has been granted modular approval. OEM integrators for host products may use the module in their final products without additional FCC / IC (Industry Canada) certification if they meet the following conditions. Otherwise, additional FCC / IC approvals must be obtained. The host product with the module installed must be evaluated for simultaneous transmission requirements.  The users manual for the host product must clearly indicate the operating requirements and conditions that must be observed to ensure compliance with current FCC / IC RF exposure guidelines.  To comply with FCC / IC regulations limiting both maximum RF output power and human exposure to RF radiation, the maximum antenna gain including cable loss in a mobile-only exposure condition must not exceed 2dBi.  A label must be affixed to the outside of the host product with the following statements: This device contains FCCID: R7TAMB2524 This equipment contains equipment certified under ICID: 5136A-AMB2524
AMB8420_2524_2561_MA_V4_2 Page 55 of 61 Date: 12/2017 The final host / module combination may also need to be evaluated against the FCC Part 15B criteria for unintentional radiators in order to be properly authorized for operation as a Part 15 digital device. If the final host / module combination is intended for use as a portable device (see classifications below) the host manufacturer is responsible for separate approvals for the SAR requirements from FCC Part 2.1093 and RSS-102. OEM Requirements: The OEM must ensure that the following conditions are met.  End users of products, which contain the module, must not have the ability to alter the firmware that governs the operation of the module. The agency grant is valid only when the module is incorporated into a final product by OEM integrators.  The end-user must not be provided with instructions to remove, adjust or install the module.  The Original Equipment Manufacturer (OEM) must ensure that FCC labeling requirements are met. This includes a clearly visible label on the outside of the final product. Attaching a label to a removable portion of the final product, such as a battery cover, is not permitted. The label must include the following text: Contains FCC ID: R7TAMB2524 The enclosed device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (i.) this device may not cause harmful interference and (ii.) this device must accept any interference received, including interference that may cause undesired operation. When the device is so small or for such use that it is not practicable to place the statement above on it, the information required by this paragraph shall be placed in a prominent location in the instruction manual or pamphlet supplied to the user or, alternatively, shall be placed on the container in which the device is marketed. However, the FCC identifier or the unique identifier, as appropriate, must be displayed on the device. The user manual for the end product must also contain the text given above.  Changes or modifications not expressly approved could void the user's authority to operate the equipment.  The OEM must ensure that timing requirements according to 47 CFR 15.231(a-c) are met.  The OEM must sign the OEM Modular Approval Agreement with xxxxx  The module must be used with only the following approved antenna(s). 21.2.6 AMB2524 & AMB2524-1 The module variants HVIN AMB2524 and AMB2524-1 collected in the PMN AMB2524 are identicall in enclosure, appearance, PCB design and bands/technologies. The only difference is, that in AMB2524 an integrated Chip Antenna is used and for the AMB2524-1 an external λ/4 Antenna is used.
AMB8420_2524_2561_MA_V4_2 Page 56 of 61 Date: 12/2017 21.3 AMB2561 21.3.1 Important notice The use of RF frequencies is limited by national regulations. The AMB2561 has been designed to comply with the Radio Equipment Directive 2014/53/EU of the European Union (EU). The AMB2561 can be operated without notification and free of charge in the area of the European Union. However, according to the RED, restrictions (e.g. in terms of duty cycle or maximum allowed RF power) may apply. Conformity assessment of the final product The AMB2561 is a subassembly. It is designed to be embedded into other products (products incorporating the AMB2561 are henceforward referred to as "final products"). It is the responsibility of the manufacturer of the final product to ensure that the final product is in compliance with the essential requirements of the European Radio Equipment Directive. The conformity assessment of the subassembly AMB2561 carried out by AMBER wireless GmbH does not replace the required conformity assessment of the final product in accordance to the RED. Exemption clause Relevant regulation requirements are subject to change. AMBER wireless GmbH does not guarantee the accuracy of the before mentioned information. Directives, technical standards, procedural descriptions and the like may be interpreted differently by the national authorities. Equally, the national laws and restrictions may vary with the country. In case of doubt or uncertainty, we recommend that you consult with the authorities or official certification organizations of the relevant countries. AMBER wireless GmbH is exempt from any responsibilities or liabilities related to regulatory compliance.
AMB8420_2524_2561_MA_V4_2 Page 57 of 61 Date: 12/2017 21.3.2 EU Declaration of conformity AMB2561
AMB8420_2524_2561_MA_V4_2 Page 58 of 61 Date: 12/2017 21.3.3 FCC statement FCC ID: R7TAMB2561 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. (FCC 15.19) Radio Frequency Interference (FCC 15.105) This equipment has been tested and found to comply with the limits for Class B digital devices pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turnin the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: - Reorient or relocate the receiving antenna. - Increase the separation between the equipment and receiver. - Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. - Consult the dealer or an experienced radio/TV technician for help. Modifications (FCC 15.21) Caution: Changes or modifications for this equipment not expressly approved by AMBER wireless may void the user’s authority to operate this equipment.
AMB8420_2524_2561_MA_V4_2 Page 59 of 61 Date: 12/2017 21.4 AMB2520-4 21.4.1 Important notice The use of RF frequencies is limited by national regulations. The AMB2520-4 has been designed to comply with the Radio Equipment Directive 2014/53/EU of the European Union (EU). The AMB2520-4 can be operated without notification and free of charge in the area of the European Union. However, according to the RED, restrictions (e.g. in terms of duty cycle or maximum allowed RF power) may apply. Conformity assessment of the final product The AMB2520-4 is a subassembly. It is designed to be embedded into other products (products incorporating the AMB2520-4 are henceforward referred to as "final products"). It is the responsibility of the manufacturer of the final product to ensure that the final product is in compliance with the essential requirements of the European Radio Equipment Directive. The conformity assessment of the subassembly AMB2520-4 carried out by AMBER wireless GmbH does not replace the required conformity assessment of the final product in accordance to the RED. Exemption clause Relevant regulation requirements are subject to change. AMBER wireless GmbH does not guarantee the accuracy of the before mentioned information. Directives, technical standards, procedural descriptions and the like may be interpreted differently by the national authorities. Equally, the national laws and restrictions may vary with the country. In case of doubt or uncertainty, we recommend that you consult with the authorities or official certification organizations of the relevant countries. AMBER wireless GmbH is exempt from any responsibilities or liabilities related to regulatory compliance.
AMB8420_2524_2561_MA_V4_2 Page 60 of 61 Date: 12/2017 21.4.2 EU Declaration of conformity AMB2520-4
AMB8420_2524_2561_MA_V4_2 Page 61 of 61 Date: 12/2017 22 Important information 22.1 Exclusion of liability AMBER wireless GmbH presumes that the information in this document is correct at the time of publication. However, AMBER wireless GmbH reserves the right to modify technical specifications or functions of its products or discontinue the production of these products or the support of one of these products without any written announcement or notification to customers. The customer must make sure that the information used is valid. AMBER wireless GmbH does not assume any liability for the use of its products. Amber wireless GmbH does not grant licenses for its patent rights or for any other of its intellectual property rights or third-party rights. Customers bear responsibility for compliance of systems or units in which AMBER wireless products are integrated with applicable legal regulations. 22.2 Trademarks AMBER wireless® is a registered trademark of AMBER wireless GmbH. All other trademarks, registered trademarks, and product names are the exclusive property of the respective owners. 22.3 Usage restriction AMBER wireless products are not approved for use in life-supporting or life-sustaining systems or units or other systems whose malfunction could result in serious bodily injury to the user. Moreover, AMBER wireless products are not approved for use as key components of any life-supporting or life-sustaining system or unit whose malfunction could result in the failure of the life-supporting system or unit or could affect its safety or effectiveness. AMBER wireless customers who use these products in such applications or sell them for such usage act at their own risk and must relieve AMBER wireless GmbH from all damages that may result from the sale for unsuitable purposes or unsuitable usage. By using AMBER wireless products, the user agrees to these terms and conditions. Copyright © 2017, AMBER wireless GmbH. All rights reserved. AMBER wireless GmbH Phone +49.651.993.550 Email info@amber-wireless.de Internet www.amber-wireless.de

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