Siemens DECT Engine MD32. Product Description. Information and Communication Products

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1 Siemens DECT Engine MD32 Product Description Siemens DECT Engine MD32 1/16 Product Description

2 The Siemens DECT Engine MD32 is a module offering an easy way to provide a radio connection for data transmission to any kind of application. The module is integrated into a host system and is accessed by the host application via a serial line (RS232 interface). The Siemens DECT Engine MD32 incorporates the complete RF part and autonomously runs the DECT protocol. 2 Power 5V Power Supply Radio Interface Host Interface FFC Connector 20 pin Power on/off 1 V.24/Ports 8 Audio 4 analogue Lock_Ind 1 Reset 1 2 DECT- Controller RF Control Data DECT RF Part antenna 1/2 RF Ant.- switch Diversity * option wire ant. 1 * wire ant. 2 * 50 Ohm point 1 50 Ohm point 2 Features: Data transmission with data rates of up to 19.2 kbps Conforms to DECT standard Serial 3V RS232 interface to host system A terminal (portable part, ) can subscribe on up to 6 base stations (fixed part, FP) Control of up to 16 terminals from one base station (FP) running 4 simultaneous links at one time Possibility of building a system of up to 6 base stations with up to 16 terminals roaming through this multi-cell environment Single 5V power supply Mounting points for two plug-in wire antennae Solder pads for two PCB mount angle cable terminators for external antennae Supports antenna diversity in base station modes Small mechanical dimensions (65 x 37 x 5 mm) Note: The analogue port is reserved for future enhancements with voice transmission. Siemens DECT Engine MD32 2/16 Product Description

3 1 Functionality 1.1 Modes of Operation Configuration The Siemens DECT Engine MD32 can be configured to any of three different modes of operation: V.24 Replacement (Portable Part) V.24 Replacement FP (Fixed Part) V.24 Server FP (Fixed Part) The Configuration Mode is entered with a specific sequence on the RS232 signal RTS or by submitting a special escape sequence to the module via the V.24 interface. After submitting this sequence the DECT Engine interprets all data arriving at the serial interface as AT commands. The commands implemented are a subset of the V.25ter commands with extensions for accessing internal configuration registers (S-register). These registers are kept as a profile in the permanent memory of the Siemens DECT Engine MD32. After the configuration mode is exited either by AT command or reset, the module starts operating in the configured mode. This applies also for activation of the module by power-on. The configuration data of a fixed part are retained when reconfiguring the module as a portable part and vice versa. The Siemens DECT Engine may operate in only one mode at a given time. It is possible to change the mode of operation by resetting the module and reconfiguring it V.24 Replacement /FP This mode allows replacement of the RS232 cable of a point to point connection (e.g. a PC to a PC) by a point to-point radio link. The Siemens DECT Engine emulates an RS232 cable and transfers information on the RS232 circuits transparently to a V.24 Replacement FP/V.24 Server FP in both directions using an error correction protocol conformant with the LU10 standard. This assures a BER of less than A V.24 Replacement can enroll in up to 6 fixed parts (FP). A V.24 Replacement FP can enroll in up to 16 Portable Parts (). The subscription can be done in two different ways. The first way is to start a subscription procedure in the and the FP together with an optional PIN using an AT command. All the required information is exchanged on air. The second possibility is to exchange this information under control of the host application using AT commands. Switching between portable or fixed part mode is only possible during configuration. Once a or FP is selected only point-to-point connections are possible. Siemens DECT Engine MD32 3/16 Product Description

4 DTE (PC) MD32 DECT MD32 FP RX RX TX TX RTS RTS CTS CTS DTR DTR DSR DSR DCD DCD RI RI DTE (PC) Example of a Zero Modem Connection using V.24 Replacement /FP V.24 Sever FP This mode allows control of up to 16 V.24 Replacement s running 4 connections at the same time. For this reason a special packet-oriented V.24 protocol has been introduced that supports up to 16 virtual V.24 interfaces. This protocol maps up to 16 physical RS232 interfaces related to the 16 enrolled V.24 Replacement s to the physical RS232 interface of the V.24 Server FP. A packet of this protocol contains an address header, a status field with the RS232 control signals of the corresponding V.24 Replacement, a length field and a data field. The host application has to support this protocol. The following picture shows the topology of this operation environment with 4 concurrent connections: DCE Appl. 1 FP DCE Appl. 2 FP DCE Appl. 15 FP Virtual World Virtual COM1 Virtual COM2 Virtual COM15 Physical COM Physical World MD32 Physical 1 COM1 2 Server Multi Link 15 Physical COM2 MD32 FP DTE Appl. 1 Physical COM15 Appl. 2 DTE DTE Appl. 15 DCE Appl. 16 FP Virtual COM16 Host Computer e. g. PC 16 Physical COM16 Appl. 16 DTE Note, that only HW handshake is possible between the virtual V.24 interface within the host system and the physical RS232 interface of the terminal! With the first request for data transfer of either the server host or the terminal host, a connection is established at the DECT level. The time this link is held active after data have been transmitted can be set by AT commands. There are two basic different scenarios depending on the setting of this time: If the time until an automatic release is very long, four established links will block further terminals from contacting the server. This may induce delay if a terminal wants to start a transaction with the host. On the other hand, response times for the established links are quite short. This scenario resembles circuit-switched data transfer. It is recommended when the DECT link is part of a connection which uses telephone networks. If the waiting time is very short, the radio link will be released shortly after the Siemens DECT Engine MD32 4/16 Product Description

5 transmission of the data packet. Consequently, the server module is freed to respond to connections from other terminals. This scenario resembles packet-switched data. It should be used when the terminal is connected to data networks via ethernet. 1.2 Multicell Systems The following figure gives an example of a multicell environment with two V.24 Server FPs and four V.24 Replacement s. A V.24 Replacement leaving the coverage area of an DP is indicated by LOC_IND = OFF. The DECT Engine switches to another FP automatically. As an alternative this switching to another FP can be done under control of the terminal host using an AT command. When changing the FP an active data transmission is aborted and buffered data are lost. The host application has to consider this FP FP V.24 V.24 4 PC Siemens DECT Engine MD32 5/16 Product Description

6 2 Host Interface A 20-pin connector (AVX ) for Flat Flexible Cables (FFC) of 0.5- mm pitch and 0.3-mm thickness connects the module to the host device. It has the following interfaces. 2.1 Data Interface The Data Interface is realized with a serial asynchronous transmitter and receiver according to TTU-T RS232 Interchange Circuits DCE. It is set to 8 data bits, no parity, 1 stop bit and can be run at 9.6 kbps or 19.2 kbps. In-band (HW handshake via RTS/CTS) and out-band (via XON/XOFF) flow control is supported. In addition, the modem control signals DTR, DSR, DCE and RI are available. The Data interface works at 3.3V TTL RS232 without level shifters for +/- 12V signal levels. The polarity of the signals is therefore inverted, e.g. off is high TTL level, on low TTL level. 2.2 Control Signals The following control signals are available (3V TTL level): Inputs: RST =1 0 edge the DECT Engine will be reset =0 or 1 normal operation PON =0 power save mode (all voltage regulators switched off), no operation =1 DECT Engine is switched on (active) Outputs: LOCK_IND =0 Siemens DECT Engine (configured as ) is locked on FP (e.g. there is a base station within reach to which the terminal DECT Engine is subscribed) =1 Siemens DECT Engine (configured as ) is unlocked on FP (e.g. there is no base station within reach to which the terminal DECT Engine is subscribed) RI =0 Ring Indicate (indicates a incoming call). Wakeup of host application. =1 No Operation Siemens DECT Engine MD32 6/16 Product Description

7 2.3 Power Supply A single +5V voltage supplies the module. Linear regulators stabilize the supply voltages for the DECT Controller and for the RF part. A DECT Engine changes automatically to standby mode when the air link to the base station is released. The delay between sending the last data and release of the link can be adjusted by AT commands during configuration. The standby mode is exited when a new link has to be established (either by incoming data on the serial line or a request from the base station). An FP DECT Engine has no power-reduced mode for it is constantly sending although no link is established. This is required in order to keep the corresponding DECT Engine(s) synchronized to the FP. All linear regulators can be switched off by the DECT Controller if the PON signal is not active. The module is then in the power save mode. No Rx/Tx modes are possible. The Siemens DECT Engine can be switched on again with PON = active. Siemens DECT Engine MD32 7/16 Product Description

8 2.4 Pin Assignment Function Signal PIN I/O Description Power VCC 1, 2 positive voltage supply +5V GND 19, 20 Ground Power on/off PON 16 I high = on (standby) low = off (power save) Restart RST 6 I high = nop high to low edge = Reset of MD32 (t low >100ns) low = nop : Idle lock indicator FP: not used LOCK_IND 4 O low = locked on FP high = unlocked on FP RS232 Received Data from MD32 RXD 12 O high=1 low=0 RS232 Transmit Data to MD32 TXD 15 I high=1 low=0 RS232 Ready To Send to MD32 RTS 11 I high = off low = on RS232 Clear to Send to host CTS 14 O high = off low = on RS232 Data Terminal Ready DTR 10 I high = off low = on RS232 Data Set Ready DSR 5 O high = off low = on RS232 Ring Indication RI 7 O high = off low = on (may wake up host system) RS232 DCD 13 O high = off Data Channel Detect Audio Interface (Gain-adjustable with AT commands) low = on Differential Codec analog Input (reserved for future use) Differential Codec analog Output (reserved for future use) MIC+ 18 I MIC- 17 I LRS+ 8 O LRS- 9 O reserved I/0 Port GP 3 nop = no operation must be unconnected Siemens DECT Engine MD32 8/16 Product Description

9 3 Radio Interface The DECT Controller handles all signal and data processing needed within a DECT device. Internal software runs the host interface and the whole DECT protocol stack. A UART forms the interface to the host system. Internal ROM stores the program SW and flash memory-permanent parameters. RAM is used for data buffers and registers. The RF part of the DECT Engine MD32 is based on Siemens one-chip transceiverintegrated circuit using B6HF bipolar technology. To achieve maximum output power, modern GaAs-FET technology is established during final power amplifier stages. The DECT Engine MD32 provides excellent signal quality even in poor RF environments by supporting antenna diversity capability. If the Siemens DECT Engine MD32 is configured as, the antenna diversity switch is fixed to one position. The position can be modified by AT command. The module allows connection of two types of antennae. Wire antennae are clipped to holes in the PCB. They will be delivered with each DECT Engine. For applications with external antennae, it is possible to solder 50-ohm PCB mount angle cable terminator for the external antenna coax cable type SUHNER 86 MCX The solder pads are 50-ohm matched. For each type there are two connection points to support antenna diversity. Siemens DECT Engine MD32 9/16 Product Description

10 4 Mechanical Characteristics Antenna 1 Antenna 2 Antenna 1 Antenna 2 Siemens DECT Engine MD32 10/16 Product Description

11 1 2 SUHNER 86 MCX Koax Cable for Antenna 1 Koax Cable for Antenna 2 ZIF FFC Cable 0.5 mm pitch 20 pins 0.3mm thickness e.g. by Molex FFC Connector (AVX ) max. cable length: 200 mm Weight: Module 10.7 g Two antennae 0.3 g Siemens DECT Engine MD32 11/16 Product Description

12 5 Electrical and Radio Characteristics 5.1 Absolute maximum ratings Parameter Min Max Units Supply voltage VCC V Voltage on digital pins 3-7, V Voltage on analog pins 8, 9, 17, V I-protection diodes on any pin 50 µa Storage temperature C Values beyond which damage to the device may occur. 5.2 Operating Conditions Parameter Min Typ Max Units Ambient temperature 0 40 C Supply voltage VCC V 5.3 Power Supply Parameter Description Conditions Min Typ Max Units V VCC I VCC Supply voltage I VCC = 40mA V Voltage drop I VCC = 450mA 350 mv Added ripple I VCC = mA 100 mv Supply current Power Save Mode 100 µa average Synchronisation 80 ma for t=2s (Power Standby consumption) normal duty cycle ma low duty cycle 4 5 ma Idle FP ma One active voice ma or data channel FP ma Every additional ma data channel 1) FP ma Supply current peak Peak current (during ma transmission slot 417µs) () Siemens DECT Engine configured as Portable Part only (FP) Siemens DECT Engine configured as Fixed Part only 1) max. number of simultaneous channels: : 1 FP: for handover Siemens DECT Engine MD32 12/16 Product Description

13 5.4 Digital I/O s Parameter Description Conditions Min Typ Max Units V IL Logic 0 input level 0.6V V V ich Logic 1 input level 2.4 V I in Input current V in =3V 10 µa V in =GND 100 µa V OL Logic 0 output level I out =2mA V V OH Logic 1 output level I out =2mA V I out Output current 2 ma t OR Output rise time C LOAD <=10p 100 ns t OF Output fall time 100 ns t IR allowed input rise C LOAD <=20p 500 ns time t IF allowed input fall time 500 ns 5.5 Timing characteristics Parameter (times) Min Typ Max Units Start up to locked time: 2 s VCC=on to LOCK_IND=0 ( locked) Wake up to lock time: 2 s PON=1 to LOCK_IND=0 ( locked) Start up time after reset 2 s RST =1 0 to LOCK_IND=0 ( locked) time to ready to receive data via RS s after reset or Power on Delay Locked Active Link normal duty cycle low duty cycle ms ms Data or Speech Transmission Delay 20 ms (Data In Data Out) Data Transmission Delay 35 (Data In Data Out) Baud Rate on serial Interface kbit/s Siemens DECT Engine MD32 13/16 Product Description

14 5.6 Air Interface Parameter Min Typ Max Units Frequency range MHz RF Power 250 mw RF channels 10 Carrier spacing MHz Multiplex, Duplex TDMA / FDM, TDD Time slots 24 Time slots usable RX/TX 6/6 Frame duration 10 ms Modulation GFSK, BT=0.5 Gross Bit Rate (frame) 1,152 MBps Net Bit Rate speech 32 kbps Net Bit Rate data protected 19.2 kbps Data protection CRC, ARQ, LU10 protocol Receiver input sensitivity dbm at BER 0.1% channel allocation instant dynamic coverage range line of sight 300 m coverage range indoor 50 m Siemens DECT Engine MD32 14/16 Product Description

15 6 Type approval The DECT Engine is approved in its reference configuration in accordance with the currently valid telecommunications regulations and bears the appropriate CE label. The following test reports of an accredited test laboratory are obtainable and can be made available to customers for their conformity declarations: CTR6 Fixed Part CTR6 Portable Part EMC (in accordance with ETS ) LVD (in accordance with EN 60950) When the DECT-Engine is used in customer applications, evidence of conformity with the essential requirements of the R&TTE Directive is to be provided in the form of a conformity assessment procedure. The essential requirements include: 1. Protecting of the health and the safety of the user, 2. Protection requirements relating to EMC, 3. Effective use of the assigned spectrum so as to avoid harmful interference. The conformity declaration concerning the radio part of the device including the DECT Engine MD32 can be made on the basis of the available test reports. This however requires that the conditions of use laid down in the technical documentation of the DECT Engine MD32 such as temperature, supply voltage and antenna installation are adhered to and no directional antennas, active antennas or boosters will be used. Under these conditions no further measurements are necessary. When making adjustments for certification of the other functionalities of the devices (esp. the measurements to ensure the requirements 1 and 2) it is mandatory that the DECT Engine MD32 is transmitting data during the measurements. 7 Support The following solution development kits are available: Evaluation Kit: - 3 Siemens DECT Engines MD32 with all necessary adapters, cables and power supply units - Further detailed technical description and demonstration software as binaries and source code will be supplied via or internet. Development Support Kit: - 1 Siemens DECT Engine MD32 - Adapter board with all necessary cables and power supply units Together with delivery of any kit access to hotline service of the suppliers (Siemens or distribution partner) is available. Siemens DECT Engine MD32 15/16 Product Description

16 Issued by Information and Communication Products Group Hofmannstr. 51, Munich, Germany, Siemens Aktiengesellschaft Subject to availability. Right of modification reserved. Siemens DECT Engine MD32 16/16 Product Description

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