Prettl Elektronik Radeberg GmbH PER1220 User Manual Project:
Phase:
Author:
Status:
Serial Port Bluetooth Module Approved Frank Hennig/EWG. Released Version:
1.0 Last saved: 17.08.2005 Last editor: Scm2ra User_Manual_PER1220_V11.d oc Page 2/21 PER1220 Data Book Key Features
- RFCOMM Module
- Complete embedded Bluetooth-Stack up to RFCOMM
- Serial Port on chip Application
- Bluetooth V1.2 qualified
- Point to point or point to multipoint functionality
- Class 2 Bluetooth device, 4 dBm
- User payload data rate is up to 380 kbps over Bluetooth
- Module Interfacing over UART
- Temperature Range qualified: - 20 C to + 70 C
- Mechanical outline: 25.0 mm x 21.5 mm x 2.8 mm
- Power Supply: 3.3 V DC Description The PER1220 is a ready to market Class 2 Bluetooth Modul Solution. It can easy implemented in any electronical device to add Bluetooth connectivity. In standard configuration the module includes an 8 Mbit Flash, a radio solution, interfaces to antenna and application together with signalling at RFComm level. The Module supports both voice and data transmissions. Since the PER1220 is already a qualified product according to Bluetooth Specification V1.2 the requested cost and time afford for qualification is kept to a minimum. The standard software contains a full Bluetooth Protocol Stack up to RFComm and a serial port application. For example this on-chip-application can support your cable-replacement. Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book Table of Contents Page 3/21 1 GENERAL INFORMATION .................................................................................................................. 5 2 MODULE PINOUT DIAGRAMM .......................................................................................................... 6 3 DEVICE TERMINAL FUNCTIONS ....................................................................................................... 7 4 ELECTRICAL CHARACTERISTICS.................................................................................................... 9 5 RADIO CHARACTERISTICS ............................................................................................................. 12 6 PER1220 BLUETOOTH SOFTWARE STACK .................................................................................. 12 6.1 KEY FEATURES.......................................................................................................................... 12 7 DEVICE TERMINAL DESCRIPTION ................................................................................................. 14 7.1 7.2 7.3 7.4 7.5 7.6 ANTENNA .................................................................................................................................. 14 UART INTERFACE ..................................................................................................................... 14 USB INTERFACE........................................................................................................................ 15 SERIAL PERIPHERAL INTERFACE ................................................................................................. 15 PCM......................................................................................................................................... 15 PIO........................................................................................................................................... 16 8 TYPICAL RADIO PERFORMANCE................................................................................................... 17 9 RECOMMENDED SOLDER PROFILE .............................................................................................. 17 10 INSTALLATION................................................................................................................................ 19 10.1 10.2 10.3 10.4 ANTENNA .................................................................................................................................. 19 POWER SUPPLY......................................................................................................................... 19 INTERFACES .............................................................................................................................. 20 FCC CONFORMANCE................................................................................................................. 20 11 ORDERING AND CONTACT INFORMATION................................................................................. 20 12 REGULATORY STATEMENTS ....................................................................................................... 21 12.1 FCC STATEMENTS .................................................................................................................... 21 13 DOCUMENT REFERENCES............................................................................................................ 23 14 RECORD OF CHANGES ................................................................................................................. 23 Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book Page 4/21 Acronyms and Definitions BC Module BlueCore Module CTS HCI LC LM MC Clear To Send Host Controller Interface Link Controller Link Manager Microcontroller MCU Microcontroller Unit RTS RxD TxD HCI SPP Request To Send Receive Data Transmit Data Host Controller Interface Serial Port Profile UART Universal Asynchronous Receiver Transmitter SPI PCM USB PIO AIO XTAL Vin Serial Periphal Interface Pulse Code Modulation Universal Serial Bus Parallel In-/Output Analogue In-/Output BlueCore Clock Power Supply Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book 1 General Information Page 5/21 The PER1220 Module (see figure 1) is based on a Bluetooth Single Chip from Cambridge Silicon Radio with a few external components. It has various interfaces to the target hardware / application:
UART, SPI, PCM, USB, PIO and AIO. XTAL Flash BlueCore RAM 2.4 GHz Bluetooth Radio Basisband DSP I/O RF in RF out Mikro-
controller Vin = 3,3 V USB SPI PCM PIO AIO UART Figure 1: Overview PER1220 In standard configuration the PER1220 provides a complete Bluetooth protocol stack up to RFCOMM layer (see figure 2). It is possible to upgrade the firmware and to run an on-chip-application. This gives a true Bluetooth single chip solution (see also figure 2). e r a w d r a H t s o H 2 C F R _ D O M _ T B Application Adoption Layer Host Transport RFComm L2CAP HCI (optional) Link Manager Bluetooth Baseband BluetoothRadio Host Hardware (optional) Host Transport Application Adoption Layer RFComm L2CAP HCI (optional) Link Manager Bluetooth Baseband BluetoothRadio 2 C F R _ D O M _ T B Default Stack configuration Figure 2: Firmware configurations Stack configuration with On-Chip-Application Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book Page 6/21 2 Module Pinout Diagramm 1 34 PCM_OUT PCM_SYNC PCM_IN PCM_CLK USB_D+
USB_D-
PIO(7) PIO(6) PIO(5) PIO(4) PIO(3) PIO(2) PIO(1) PIO(0) GND Antenna GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 0 2 2 1 R E P 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 GND
+3V3
(TP +1V8) UART_RX UART_RTS UART_TX UART_CTS SPI_MOSI SPI_CLK SPI_CSB SPI_MISO NC AIO(1) AIO(0) GND NC GND Figure 3: BT_MOD_RFC2 Pinout Diagramm Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book Page 7/21 3 Device Terminal Functions Radio and Power Supply Pin Padtype Description Antenna 16 Analogue, Z0 = 50 Ohm RF IO Power Supply 33 3V3 Positive power supply for PER1220 Testpoint Pin Padtype Description Testpoint 32
+1V8 VREG Testpoint PCM Interface Pin Padtype Description PCM_Out PCM_IN PCM_SYNC PCM_CLK 1 3 2 4 CMOS output, tristatable with weak internal pull-down Synchronous data output CMOS input, tristatable with weak internal pull-down Synchronous data input Bi-directional with weak internal pull-
down Synchronous data SYNC Bi-directional with weak internal pull-
down Synchronous data clock UART and USB Pin Padtype Description UART_TX UART_RX UART_RTS UART_CTS USB_D+
(4) USB_D-
(4) 29 CMOS output UART data output active high 31 30 28 5 6 CMOS input with weak internal pull-
down UART data input active high CMOS output, tristatable with weak internal pull-up UART request to send active low CMOS input with internal weak pull-
down UART clear to send active low Bi-directional Bi-directional USB data plus USB data minus SPI Pin Padtype Description SPI_CSB 25 CMOS input with weak internal pull-up Chip select for Serial Peripheral Interface active low Serial Peripheral Interface clock SPI_CLK SPI_MOSI SPI_MISO 26 27 24 CMOS input with weak internal pull-
down CMOS input with weak internal pull-
down Serial Peripheral Interface input CMOS output, tristatable with weak internal pull-down Serial Peripheral Interface ouput Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book Page 8/21 PIO Port (2) Pin Padtype Description PIO(0) PIO(1) 14 13 Bi-directional with programmable weak internal pull-up/down Programmable input/output line Bi-directional with programmable weak internal pull-up/down Programmable input/output line PIO(2)/USB_PULL_UP (1) 12 Bi-directional with programmable weak internal pull-up/down PIO or USB pull-up (via 1.5k resistor to USB_D+) PIO(3)/USB_WAKE_UP/R AM_CSB (1) 11 Bi-directional with programmable weak internal pull-up/down PIO or output goes high to wake up PC when in USB mode or external RAM chip select PIO(4)/USB_ON (1) 10 Bi-directional with programmable weak internal pull-up/down PIO or USB on (input senses when VBUS is high, wake BlueCore02) PIO(5)USB_DETACH (1) PIO(6)/CLK_REQ PIO(7) AIO(0) AIO(1) 9 8 7 21 22 Bi-directional with programmable weak internal pull-up/down PIO line or chip detaches from USB when this input is high Bi-directional with programmable weak internal pull-up/down Bi-directional with programmable weak internal pull-up/down PIO line or clock request output to enable external clock for ecternal clock line Programmable input/output line(1) Bi-directional with programmable weak internal pull-up/down Programmable input/output line (3) Bi-directional with programmable weak internal pull-up/down Programmable input/output line (3) Notes:
(1) USB functions can be software mapped to any PIO terminal
(2) All PIOs are configured as inputs with weak pull-downs at reset.
(3) Unused AIO pins may be left unconnected
(4) If unused USB_D+ and USB_D- should be connected to ground Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book 4 Electrical Characteristics Absolute Maximum Ratings Rating Storage Temperature Supply Voltage +3V3 Recommended Operating Conditions Operating Condition Operating Temperature Range Supply Voltage +3V3 Input/Output Terminal Characteristics Digital Terminals Input Voltage VIL input logic level low (VDD=3.0 V)
(VDD=1.8 V) VIH input logic level high Output Voltage VOL output logic level low, (Io=4.0mA), VDD =3.0 V VOL output logic level low, (Io=4.0mA), VDD =1.8 V VOH output logic level high, (Io=4.0mA), VDD =3.0 V VOH output logic level high, (Io=4.0mA), VDD =3.0 V Input and Tristate Current with:
Strong pull-up Strong pull-down Weak pull-up Weak pull-down I/O pad leakage current C Input Capacitance Page 9/21 Max
+70 C Max
+ 70C 3.6 V Min
-20 C Min
-20 C 3.0 V Min Typ Max Unit
-0,4
-0.4 2.31
3.1 2.9
+100
+10
-5 0
-1 2.5
-20
+20
-1
+1 0
+0.8
+0.4 3.7 0.2 0.4
-10
+100 0
+5
+1 10 V V V V V V V A A A A A pF Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book Page 10/21 Input/Output Terminal Characteristics (Continued) USB Terminals Input threshold VIL input logic level low VIH input logic level high (VDD_PADS=3.46 V) (2) Input leakage current 0 < VIN < 3.3 V (1) CI Input capacitance Output levels to correctly terminated USB Cable VOL output logic level low VOL output logic level high Min Typ Max Unit
2.31
-1 2.5 0 2.8
1.32
1 10 0.2 3.3 V V A pF V V Notes:
Current drawn into a pin is defined as positive; current supplied output of a pin is defined as negative.
(1) Internal USB pull-up disabled.
(2) 3.46 V= 3.3 V + 5 %
Input/Output Terminal Characteristics (Continued) Auxillary DAC, 8-Bit Resolution Resolution Average Output step size (1) Ouput Voltage Voltage Range (Io=0) Current Rage Minimum output voltage (Io=100 A) Min
12.5 0
-10 0 Maximum output voltage (Io=10 mA) VDD_PIO-0.3 High Impedance Leakage Current Offset Integral non-linearity(1) Starting time (50pF load) Setting time (50pF load)
-1
-220
-2
(1) Specified for an output voltage between 0.2 V and 1.6 V Typ
14.5 monotonic(1)
Max 8 17.0 VDD_PIO
+0.1 0.2 VDD_PIO
+1
+120
+2 10 5 Unit Bits mV V mA V V A mV LSB s s Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book Average Power Consumption (1) Temperature = +20 C Mode Inquiry Scan inquiry intervall = 1.28 s inquiry window = 11.25 ms ACL link (Slave), no data transfer, sniff intervall = 0.64 s Sniff attempt = 2.5 ms sniff timeout = 2.5 ms park intervall = 1.28 s Min Average Max
(Peak) 0.065 1.3 29.1 0.065 0.342 23.2 ACL link (Slave), data transfer 1.7 22.6 38.5 Standby, no radio activity, UART 115.5 kbit/s, Slave 0.065 0.088 1.5 Deep Sleep Leakage Current (1) Supply Voltage = 3.3 V Temperature = +20 C Mode Deep Sleep Notes:
Value 65 Page 11/21 Unit mA mA mA mA Unit A
(1) Power Consumption is the sum of both Bluetooth Single Chip and flash (see figure 4) These results are only correctly with firmware v16.4.4 and the on-chip application Serial Port Profile Slave. A VREG 1.8 V 3.3 V Flash Bluetooth Single Chip Figure 4: Power Consumption Measurement Setup Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book 5 Radio Characteristics Page 12/21 The PER1220 Bluetooth Module is qualified according to Bluetooth Specification V 1.2. So its radio characteristics are equal or better as requested in the specification. Please contact PRETTL support staff for more detailed information. 6 PER1220 Bluetooth Software Stack PER1220 comes with a Bluetooth stack firmware running in the internal RISC microcontroller. This is compliant to the Bluetooth Specification V1.2 The Bluetooth Module software architecture includes an on chip Serial Port Profile application. This eliminates the need for host-side software and processing time. Therefore it is easy to implement the PER1220 in a legacy application. Host Hardware (optional) Host Transport Application Adoption Layer RFComm L2CAP HCI (optional) Link Manager Bluetooth Baseband BluetoothRadio 2 C F R _ D O M _ T B Stack configuration with On-Chip-Application Figure 5: Stack configuration with On-Chip Application This firmware requires no host processor. All software layers, including application software, run on the internal RISC processor in a protected user software execution code environment. 6.1 Key Features Interfaces to Host RFCOMM, an RS-232 serial cable emulation protocol SDP, a service database look-up protocol Connectivity Maximum number of active slaves: 3 Maximum number of simultaneous active ACL connections: 3 Maximum number of simultaneous active SCO connections: 3 Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book Data Rate up to 380 kbit/s Page 13/21 Security Full support for all Bluetooth security features up to and including strong (128-bit) encryption Power Saving Full support for all Bluetooth power saving modes (Park, Sniff and Hold) System Power saving modes (Deep Sleep, Shallow Sleep) Data Integrity Channel Quality Driven Data Rate (CQDDR) increases the effective data rate in noisy environments Receiver Signal Strength Indicator (RSSI) used to minimise interference to other radio using ISM band Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book Page 14/21 7 Device Terminal Description 7.1 Antenna 2.4 GHz Antenna (Z0 = 50 Ohm)
- Min. 100 MHz Bandwidth
- Temperature range: -20 C to + 70 C
- A ceramic antenna requires a copper free area in all PCB layers
- Antenna gain: 0 dBi (If your antenna uses another antenna gain, you must do your own FCC approval) This antenna gain is mandatory for the FCC limited modular approval. See Chapter 12 Regulatory Statements. 7.2 UART Interface PER1220 Universal Asynchronous Receiver Transmitter (UART) interface provides a simple mechanism for communicating with other serial devices using the RS232 Standard (1). PER1220 UART_TX UART_RX UART_RTS UART_CTS Figure 6: Universal Asynchronous Receiver Transmitter Four signals are used to implement the UART Function as shown in figure 6. When PER1220 is connected to another digital device UART_RX and UART_TX transfer data between the two devices. The remaining two signals UART_CTS and UART_RTS can be used to implement RS232 hardware flow control. Where both are active low indicators. All UART connections are implemented using CMOS technology and have signalling levels of 0 V and 3.3 V. UART configuration parameters, such baud rate and packet format, can optionally set Note:
(1) Uses RS232 Protocol, but voltage levels are 0 V to 3.3 V (requires external RS232 transceiver IC) Parameter Possible Values Minimum 1200 Baud (<= 2% Error) Baud Rate 9600 Baud (<= 1% Error) Maximum 1.5 Mbaud (<= 1% Error) Flow Control Parity Stop Bit Bits per channel RTS/CTS or none None, odd, even 1 or 2 8 Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book Page 15/21 The UART interface is cabable of resetting the PER1220 upon reception of a break signal (see figure 8). A break is identified by a continuos logic low on the RX terminal, as shown in figure. If tbrk is longer than the value, defined as manufacture setting, a reset will occur. tbrk Figure 8: UART Break Signal 7.3 USB Interface PER1220 contain a full speed (12 Mbit/s) USB interface, capable of driving a USB cable directly. No external USB transceiver is required. The device operates as a USB peripheral, responding to requests from a master host controller such a PC. Both the OHCI and the UHCI standards are supported. The set of USB endpoints implemented behave as a specified in the USB section of the Bluetooth Specification V1.2, part H2. As USB is a master-slave oriented system, PER1220 only supports USB slave operation. For more details, please contact PRETTL Support. 7.4 Serial Peripheral Interface PER1220 holds the firmware and the persistent store in a flash. It can be read/write by the SPI. Normally, this will be done by PRETTL. Ask for more details 7.5 PCM Pulse Code Modulation (PCM) is the standard method used to digitise human voice patterns for transmission over digital communication channels. Through its PCM interface, PER1220 has hardware support for continual transmission and reception of PCM data, thus reducing processor overhead for wireless headset applications. PER1220 offers a bi-directional digital audio interface that routes directly into the Baseband layer to the on-chip firmware. It does not pass through the HCI protocol layer. Hardware on PER1220 allows the data to be sent and received from a SCO connection. Up to three SCO connections can be supported by the PCM interface at any one time. (1) PER1220 can operate as the PCM interface Master generating an output clock of 128, 256 or 512 kHz. When configured as PCM interface slave it can operate with an input clock up to 2048 kHz. PER1220 is compatible with a variety of clock formats, including Long Frame Sync, Short Frame Sync and GCI timing environments. Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book Page 16/21 It support 13- or 16-bit-linear, 8-bit--law or A-law companded sample formats at 8 ksamples/s and can receive and transmit on any selection of three of the first four slots following PCM_SYNC. The PCM configuration options are enabled by setting a Persistent Store Key. PER1220 interfaces directly to PCM devices includes the following:
Qualcomm MSM 3000 series and MSM 5000 series CDMA Baseband devices OKI MSM7705 four channel A-law and -law CODEC Motorola MC145481 8-bit-A-law and -law CODEC Motorola MC145483 13-bit-A-law and -law CODEC PER1220 is also compatible with Motorola SSiTM Interface Ask for PER1220 that includes the Audio CODEC. Note:
(1) Subject to firmware support, contact PRETTL for details 7.6 PIO The Parallel Input Output (PIO) Port is a general purpose I/O interface to PER1220. The port consists of 8 programmable, bi-directional lines, PIO[7,0]
Programmable I/O lines can be accessed either via an embedded application running on PER1220 or via private channel. Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book Page 17/21 8 Typical Radio Performance The PER1220 Bluetooth Module operates according to the Bluetooth Specification Version 1.2. Please contact PRETTL support staff for more information. 9 Recommended Solder Profile Detailed handling requirements for manufacturing: see IPC A 610 class 2. Required soldering profile:
For any application the pre-qualified module PER1220 should be surface mounted to any kind of a solid motherboard. The pinout of the module is optimized for a standard FR4 pcb with NiAu plating. Profile specification in case of manual soldering:
Nominal temperature: 340C
Heat duration per pin: 6s (max)
solder: Sn 60 Pb 38 Cu Typ C 3,5%
Profile specification in case of double reflow soldering:
The reflow process has to be compliant to our process specification Reflow V6 (parameters see below). Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book Page 18/21 Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book 10 Installation Page 19/21 This guide describes the installation of the PER1220 in a target PCB. They are mandatory to be conform to the FCC limited modular approval. 10.1 Antenna The antenna must be mounted on a cupper area as you can see in figure 1
- A 50 Ohm microstrip wire is used for connecting it to the PER1220
- Antenna type: Phycomp 4313-115-00245 (Multilayer Ceramic Antenna) Characteristics:
Description Value Center frequency 2.45, 260 and 2,70 GHz Bandwith Gain VSWR Polarization Azimuth beamwidth Impedance Power dissipation Operatin temperature Terminations Resistance to soldering heat Weight 100 MHz 0 dBi max. 2 max. Linear Omni-directional 50 Ohm 1 W
-55 to + 125 C NiSn 260 C for 10s 0.16 g copper free area 6 mm 50 Ohm microstrip wire 2 mm Antenna 6 mm Figure 1: Mounting the antenna on the PCB 10.2 Power Supply PER1220 needs an external power supply:
stabilized 3.3 Volt DC ( 10%)
- max. current consumption 100 mA, peak: 120 mA
There are two different voltage rails inside the PER1220. One section of the module is directly powered with 3.3 Volt input voltage. The other section is powered with 1.8 Volt. Therefore the PER1220 includes a 1.8 V voltage regulator. Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. Page 20/21 PER1220 Data Book 10.3 Interfaces
The PER1220 uses 3.3 Volt CMOS Logic. 10.4 FCC Conformance
The FCC conformance is achieved with these instructions. The endproduct must be labeled with the following information.
FCC-ID FCC Logo
- This label must be displayed outside of the end product. 11 Ordering and Contact Information Order code: tbd Prettl Elektronik Radeberg GmbH Customer Support CST 2 Robert-Bosch-Strasse 10 D-01454 Radeberg Germany info.prettl-elektronik@prettl.com www.prettl-elektronik.de Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book 12 Regulatory Statements Page 21/21 The PER1220 Bluetooth module has to be implemented and used according to technical description/specification provided by PRETTL. This Bluetooth module is intended to use in all States where the BluetoothTM technology and the used frequency band is released. The PER1220 Bluetooth module is conform to the following specifications/standards:
Parts of:
FCC Part 15 EN 300 328-1 Bluetooth Qualification Test Report (foto einfgen):
12.1 FCC Statements The PER1220 is certified according FCC Part 15. This is a limited modular approval. Therefore you must comply with the following instructions. If not, you have to do your own FCC approval for your endproduct. The chapter Installation describes these instructions. RF Exposure This device and its antenna must not be co-located or operating in conjunction with any other antenna or transmitter. Label requirements The modular transmitter is be labeled with its own FCC ID number, and, if the FCC ID is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: Contains Transmitter Module FCC ID: TJXPER1220 or Contains FCC ID: TJXPER1220. Statement according to FCC part 15.19 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. Statement according to FCC part 15.21 Modifications not expressly approved by this company could void the user's authority to operate the equipment. Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book For a Class A digital device Page 22/21 This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. Copyright Prettl Elektronik Radeberg GmbH. All rights reserved. PER1220 Data Book 13 Document References Bluetooth Specification Version 1.2 Universal Serial Bus Specification Version 1.1 (September 1998) Page 23/21 14 Record of Changes Date Version Reason for Change 2005-07-29 1.0
first issue Copyright Prettl Elektronik Radeberg GmbH. All rights reserved.