BARIX IPAM400 IPAM User Manual Users manual

BARIX IPAM Users manual

Users manual

IPAM 400 Preliminary Development Specification Advanced, multi format IP audio module with network, USB and serial interfaces plus Wi-Fi, adding IP based streaming and controlling capabilities to OEM products Document version 02.20 Release date 9th April 2018 Hardware Rev. HW 12 © 2017 Barix AG, all rights reserved. All information is subject to change without notice. All mentioned trademarks belong to their respective owners and are used for reference only
Preliminary Development – BARIX IP AUDIO MODULE 400 – V 02.20 – 9.April.2018 Table of contents 2 Table of Contents TABLE OF CONTENTS 2 INTRODUCTION 4 About this document 4 Additional documents 4 About the IP AUDIO MODULE 400 4 Hardware features 4 Evaluation of the Barix IP Audio Module 4 Basic Support Package (BSP) Yocto layer 5 HARDWARE 6 Mechanical drawing 6 Block diagram 7 Network interfaces 7 Serial interfaces 7 Digital audio 7 Analog audio 8 Power supply 8 Peripheral I/O 8 CONNECTORS 9 Connector placement 9 Connector pin out 9 J1 pin out (analog audio input and output) 9 J2 pin out (GPIO, UART, USB, I2C) 9 J4 pin out (network, USB) 10 J5 pin out (I2S output) 10 LAYOUT GUIDELINES 11 General rules 11 Carrier PCB Power and Signal Domains 12 TECHNICAL DATA 13 Power supply input 13 CPUs / Boot / Memory 13 Network interfaces 13
Preliminary Development – BARIX IP AUDIO MODULE 400 – V 02.20 – 9.April.2018 Table of contents 3 Serial interfaces 13 Peripheral I/O interfaces 13 Audio interfaces 13 Audio Processor (Codec) Decoding features 13 Line Input and A/D Conversion typical values 14 Microphone input and A/D conversion typical values 14 Line output and D/A conversion typical values 14 Mechanical 14 Dimensions 14 Weight 14 MTBF calculations 15 Environmental 15 Core frequency versus Temperature variation 15 Certifications / Compliances 16 ORDERING INFORMATION 17
Preliminary Development – BARIX IP AUDIO MODULE 400 – V 02.20 – 9.April.2018 Introduction 4 Introduction About this document This Development Specification aims at giving insight to detailed technical aspects of the Barix IP AUDIO MODULE 400 (IPAM400) and complements the information given in the product sheet. Additional documents As several different Linux OS based images and packages can be used with the Barix IP AUDIO MODULE 400, the process of loading or updating software is covered in individual documents. For information about the loading and configuration of the loaded firmware please refer to the corresponding software user manual and firmware technical documentation. About the IP AUDIO MODULE 400 The IP AUDIO MODULE 400 enables manufacturers of traditional audio devices to add network capabilities to their products as well as develop IP streaming devices. Hardware features The Barix IP AUDIO MODULE 400 features: • Stereo line input and output, 0dBuStereo Line in and outputs • Microphone input (coil, powered or passive capacitive, balanced or unbalanced) • I2S input and output (192k capable) • Integrated SoC with ARM Cortex quad core CPU • 10/100/100Mbit Ethernet port (with PHY) • SD/TF card slot • 16MB SPI Flash • TTL level UART • USB2.0 OTG interface, two USB2.0 Host • Dallas 1-wire interface (e.g. for Real Time Clock) • 7 GPIOs • Small form factor • Low Power consumption, runs off a single +3.3Volt DC power source • 2 mounting holes (0.106”/2.7mm) for fixation of IP Audio Module Evaluation of the Barix IP Audio Module Barix recommends the IPAM evaluation board based on Annucicom 60 for evaluation purposes prior to development of an own carrier board.
Preliminary Development – BARIX IP AUDIO MODULE 400 – V 02.20 – 9.April.2018 Introduction 5 Basic Support Package (BSP) Yocto layer The BARIX IPAM400 can be used for developing multiple applications related to networked audio distribution, playback and control. BARIX provides an embedded Linux system based on the Yocto framework and the associated Yocto layer that contains the board's Basic Support Package (BSP) for the IPAM400. This Yocto layer can be used as a base platform to develop all kind of applications on top of it. The provided BSP Yocto layer includes: · Definitions for the "barix-ipam400" machine · U-Boot boot loader · Linux Kernel 4.x · A default Linux Kernel device tree and Kernel configuration · Secure Firmware update mechanism featuring a dual root file system strategy and a recovery mechanism · Definition for a base SW image · Scripts to create and install SW images and SW updates All these functionalities are configurable and adaptable to the developer's needs. Developers can use the BSP to generate the toolchain that enables the development of any application. The BSP package is a starting point and can be easily extended by creating or adding Yocto layers that allow developers to quickly add more applications and libraries to completely customize the software and to create new SW images. The common feature set includes: • Embedded and robust operating system with IPv4/IPv6 IP stack • IP standard based protocols (TCP/IP, UDP, HTTP, ICMP, SNMP) • OEM Software development by BARIX on request • High quality, multi standard audio encoding and decoding can be implemented in software: • G.711, G.722, PCM linear, Ogg Vorbis, MP3, AAC+, FLAC • Acoustic echo cancellation (AEC)
Preliminary Development – BARIX IP AUDIO MODULE 400 – V 02.20 – 9.April.2018 Hardware 6 Hardware Mechanical drawing The Barix IP AUDIO MODULE 400 provides five, standard 2,54mm spacing, single row pin headers, intended to match target connector or motherboard, also suitable to soldering. For mechanical fixation, the board provides two 2.7mm mounting holes for 2.5mm screws. The total size is 56.1mm +/-0.2 by 33.0mm +/-0.2. Maximum component height is 5.6mm. Using standard distance bolts of 6mm a total height of 9mm above the carrier board can be achieved when mounted on a carrier board by means of soldering the pin headers into holes of the carrier board directly. Using single row female headers (counterpart to pin headers) the height will increase and must be measured by the integrator (our experience in production shows a minimal height of 11.5mm above the carrier board without using distance bolts and 12mm using 9mm distance bolts). Although the total height is increased, the advantage of being able to replace a module should be considered. The above drawing shows the component side which faces down onto the carrier PCB. Dimensions are metric (mm) Drawing is not to scale Tolerance of PCB dimension is +-0.2mm, others 0.1mm
Preliminary Development – BARIX IP AUDIO MODULE 400 – V 02.20 – 9.April.2018 Hardware 7 Block diagram Network interfaces 1 x PHY (TP), 2 ETH Status LEDs The Barix IP AUDIO MODULE 400 is equipped with one physical layer (PHY) Ethernet interface (10/100MBit, full / half duplex, auto-negotiation). Two Ethernet status LEDs can be controlled. Serial interfaces 2 x UART (TTL level), 1 x USB 2.0 OTG and 2 x USB 2.0 Host The serial port UART0 can be used to build serial standard interfaces like RS-232 or RS-485 by attaching external driver chips. Flow control signals are available for that UART. The second UART shares its function with IO pins and is Tx/Rx only. One USB 2.0 On-the-Go and 2 x USB 2.0 Host interfaces supporting High-Speed (HS,480Mbps), Full-Speed(FS,12Mbps) and Low-Speed(LS,1.5Mbps) in host mode. It complies with EHCI v1.0 and OHCI v1.0a. Digital audio I2S (Inter-IC Sound) The I2S interface can be used to connect with I2S capable devices.
Preliminary Development – BARIX IP AUDIO MODULE 400 – V 02.20 – 9.April.2018 Hardware 8 Analog audio 1 x Stereo Output (L&R), 1 x Microphone Input (balanced/unbalanced) or 1 x Stereo Input Three analog audio interfaces are provided on the Barix IP Audio Module of which two can be used concurrently (audio input can be selected to be either stereo input or microphone input). The stereo output can be used to connect to analog amplifiers. The stereo inputs allow for the connection of analog audio sources with Line level outputs. The microphone (differential inputs, self-biasing) supports the use of a wide selection of microphones (dynamic, capacitive, FET amplified). The positive microphone input pin is shared with the left line input so either Mic or Line In can be selected. The SoC provides some level adjustment in software both input and output work with nominal 0dBu audio level. Power supply 1 x VIN, 8 x DGND, 1 x AGND One connector with pins is provided to power the Barix IP Audio Module from a single +3.3 Volt DC power source. Several ground pins are implemented. It is common practice to connect them all to the ground plate. A separate ground domain for the analog part needs to be connected via separate ground pin. Max. power consumption of the IPAM 400 is 4 Watts A separate ground is provided for the audio interfaces. Peripheral I/O 6 x GPIO Of the seven 3.3VDC digital general purpose I/Os available on the IP AUDIO MODULE 400 three can be used freely by OEM software as either input or output while four I/Os are reserved for designated functions (see below). When configured as input (default) the I/O is internally pulled up to 3.3 VDC. Reserved functions: • Two I/O pins serve as a user interface for driving status LEDs (green and red) • One I/O it is used to control power on of the amplifier IO/IR-in/RXD3 B GPIO# PA14, Infrared input, UART_3 data receive D0-REL B GPIO#PA10 IO/TXD3 B GPIO#PA13 / UART_3 data transmit IO/RTS3 B GPIO#PA15 / UART_3 flow control output IO/CTS3 B GPIO#PA16 / UART_3 flow control input OWA_OUT B GPIO#PA17 / OWA( One Wire Audio); SPDIF interface.
Preliminary Development – BARIX IP AUDIO MODULE 400 – V 02.20 – 9.April.2018 Connectors 9 Connectors Connector placement For connector placement (and type) please refer to the mechanical drawing in previous chapter. Connector pin out J1 pin out (analog audio input and output) Pin # Name Type Description (usage) 1 MICIN1N AI Mic balanced negative input (unbal. Mic / line: connect 1uF to GND) 2 MICIN1P AI Mic positive input or Left channel audio input (for line see remark above) 3 AGND P Audio Ground 4 INR AI Right channel audio input 5 LINEOUTL AO Left channel audio output 6 LINEOUTR AO Right channel audio output Type: AI=Audio Input, AG=Audio Ground (centrally connected to DGND), AO=Audio Output Connector pin out J2 pin out (GPIO, UART, USB, I2C) Connector pin out J3 pin out (USB OTG, Host) Pin # Name Type Description (usage) 1 -RST D Active low Reset I/O (Hardware reset from power surveillance) 2 IO/IR-in/RXD3 B GPIO# PA14, Infrared input, UART_3 data receive, second amplifier shutdown 3 DGND P Digital Ground 4 D0-REL B GPIO#PA10 5 IO/TXD3 B GPIO#PA13 / UART_3 data transmit 6 IO/RTS3 B GPIO#PA15 / UART_3 flow control output 7 IO/CTS3 B GPIO#PA16 / UART_3 flow control input 8 OWA_OUT B GPIO#PA17 / OWA(One Wire Audio);complies with SPDIF interface 9 Recovery B VCC_IO_EN (Button for Reset/Factory defaults/Bootloader) 10 DGND P Digital Ground 11 VIN P Audio module input Voltage 3.3 VDC 12 CTS1 I UART_1 flow control input 13 RTS1 O UART_1 flow control output 14 RXD1 I UART_1 data receive 15 TXD1 O UART_1 data transmit 16 DGND P Digital Ground 17 USBDM1 B USB 2.0 Host Interface negative 18 USBDP1 B USB 2.0 Host Interface positive 19 TWI0-SCK B GPIO#PA11 /I²C Clock (Connected internally / Internal testing only) 20 TWI0-DA B GPIO#PA12 /I²C Data (Connected internally / Internal testing only) Type: O=Output, I=Input, P=Power, B=bidirectional, D = Open Drain (pull-up resistor on module)
Preliminary Development – BARIX IP AUDIO MODULE 400 – V 02.20 – 9.April.2018 Connectors 10 Pin # Name Type Description (usage) 1 Reserved 2 USB-IDDET I USB ID detection 3 DGND P Digital Ground 4 USBDM0 B USB 2.0 Host Interface negative / USB 2.0 OTG Interface negative 5 USBDP0 B USB 2.0 Host positive negative / USB 2.0 OTG Interface positive Type: O=Output, I=Input, P=Power, R = Reference level Connector pin out J4 pin out (network, USB) Pin # Name Type Description (usage) 1 EPHY-TXP O Transceiver positive output 2 TCT R Transmit Transformer center Tap 3 EPHY-TXN O Transceiver negative output 4 DGND P Digital Ground 5 EPHY-RXN I Transceiver negative input 6 RCT R Receive Transformer center Tap 7 EPHY-RXP I Transceiver positive input 8 DGND P Digital Ground 9 USBDM2 B USB 2.0 Host Interface negative 10 EPHY-SPD-LED O Ethernet 10/100M indicator LED 11 EPHY-LINK-LED O Ethernet LINK up/down LED 12 USBDP2 B USB 2.0 Host Interface positive Type: O=Output, I=Input, P=Power, R = Reference level Connector pin out J5 pin out (I2S output) Pin # Name Type Description (usage) 1 PCM0_CLK O I²S serial clock output 2 PCM0_DO O I²S serial data output 3 PCM0_SYNC O I²S frame indication 4 DGND P Digital Ground 5 Reserved 6 X24MO O Clock Output 24MHz Crystal 7 DGND P Digital Ground 8 PCM0_DI I I²S serial data input Type: O=Output, P=Power
Preliminary Development – BARIX IP AUDIO MODULE 400 – V 02.20 – 9.April.2018 Layout Guidelines 11 Layout Guidelines General rules • A low ESR Capacitor of 10uF to 47uF in parallel to a low loss ceramic 100nF capacitor is recommended as power supply bypass close to the Barix Audio Module's power supply pins. • All available ground pins of the Barix Audio Module should be attached to their respective ground domain. • Analog and digital ground domains must be connected outside of the IPAM 400 ! To allow low noise designs, the analog ground domain on the IPAM is kept unconnected from the digital (noisy) ground. • Avoid signal trace routing crossing domain borders (see graphic on next page). • Restricted Area A must not contain any high current switching circuitry nor any components creating magnetic flux (see graphic on next page). • Flood unused PCB areas with copper and connect those planes to it's respective ground. • Designers should use good PCB layout techniques suited for high speed bidirectional data bus design when the USB signal run is more than a few cm in length • The USB signal lines should be of equal electrical length and track width for their entire length • The USB signal lines include provision for termination resistors (to DGND). The exact value of the terminations may need to be checked or confirmed by a designer and are in the vicinity of 15 Kilo-Ohms (+/- 5%). These termination resistors should be close to either the USB socket or the IPAM connector. • A more complex (capacitive) termination may be needed under some circumstances. • Any unused pins can be left open to save power consumption (no pull-up or pull-down needed). • Any unused audio pins can be left open. Only exception is the need of a 1uF capacitor on MICI- (CON3 pin 1) to ground when using as unbalanced Mic input or when using Line in. • When planning on variations of carrier PCBs consider a filter consisting of a resistor/ inductivity and a capacitor (close to the target devices connector) for audio inputs and outputs: • For audio inputs always place a filter capacitor (Ci, see schematic below) to ground just after the above-mentioned resistor/ inductivity (towards the IPAM connector). For unused audio connectors inputs simply do not populate the resistor/inductivity. Calculate the values for this R-C filter according to your use (desired cut-off frequency versus impedance). • For audio outputs always place a filter capacitor (Co, see schematic below) to ground just after the above-mentioned resistor/ inductivity (towards the IPAM connector) and populate the resistor/inductivity. Calculate the values for this R-C filter according to your use (desired cut-off frequency versus impedance).
Preliminary Development – BARIX IP AUDIO MODULE 400 – V 02.20 – 9.April.2018 Layout Guidelines 12 • Although all audio inputs are DC-decoupled consider the use of current limiting resistors in the audio signal path close to the devices connectors. It is a good procedure to also limit the max input voltage to 3.3 volts using zener diodes (ZDi) right after the resistor. • Carrier PCB Power and Signal Domains Relevant excerpt from previous chapter “General Rules”: • All available ground pins of the Barix Audio Module should be attached to their respective ground domain. • You MUST provide analog ground to the PCB and that ground must be connected to the power supply ground externally to the IPAM (on the carrier PCB) • Avoid signal trace routing crossing domain borders (see graphic above).
Preliminary Development – BARIX IP AUDIO MODULE 400 – V 02.20 – 9.April.2018 Technical Data 13 Technical data Power supply input Parameter Min Max Unit Supply voltage (Nominal) 3.3 3,3 VDC Supply voltage (Absolute Maximum Ratings) 3.2 3.4 VDC Power consumption max. 4 W CPUs / Boot / Memory Parameter Details Central processor unit Quad-core ARM CortexTM –A7 MPCoreTM Processor Boot Supports fast boot process from Flash or SD/TF card Encryption Crypto Engine (CE) Memory features • 32KB L1 Instruction cache and 32KB L1 data cache per core • 512KB L2-cache • VFPv4 Floating point unit • Supports LPAE and NEON Advanced SIMD Memory 16MB SPI flash Ext. memory Supports TF and SD card Network interfaces Parameter Details Ethernet type 10/100 Base (integrated PHY) Functionality 10/100 Mbit, full / half duplex, auto negotiation Status display Link / Activity LED Protocols TCP/IP, UDP, RTP, SIP, DHCP Serial interfaces Parameter COM 1 (UART 0) Signals RxD, CTS both TTL 3.3 VDC, TxD, RTS both TTL 3.3VDC (VH min. 0.7*Vin), GND Baud rates 300 .. 115200 Data bits 7 or 8 Parity No, Even, Odd Stop bits 1 or 2 Flow control No, XON/XOFF Peripheral I/O interfaces Parameter Min Max Unit IIN/Out current for input and output -40 40 mA VIL Input Low Voltage -0.3 0.3*Vin VDC VIH Input High Voltage 0.7*Vin Vin+0.3Vdc VDC VOL Output low voltage @IOL max 4 mA 0 0.2 VDC VOH Output high voltage @IOH max 4 mA Vin-0.2Vdc Vin VDC ~ Audio interfaces Audio Processor (Codec) Decoding features Format Sampling rate / Bit rate & type PCM 16bit linear 8..48 kHz PCM 8bit logarithmic (µLaw / aLaw) 8..48 kHz G.722 16 kHz Ogg Vorbis 1 48 kHz / 500 kbps MPEG1 & MPEG2 Layer 3 (MP3) 1 8 to 48 kHz / 32..192 kbps, constant bit rate (CBR) and variable bit rate (VBR) 1 in a future firmware release
Preliminary Development – BARIX IP AUDIO MODULE 400 – V 02.20 – 9.April.2018 Technical Data 14 Audio interfaces Line Input and A/D Conversion typical values Parameter Value Unit Input clipping level (input gain set to 0 dBu)* 0.975 2.76 +2 VRMS VPP dBu Analog input impedance 2000 Ω Frequency response (-3dB) @ 48 kHz sample rate PCM 20..22750 Hz Signal-to-noise ratio (SNR) >90dB dB Dynamic Range (16 bit theoretical) 96 dB Total Harmonic Distortion (THD @ -3dBFS) <0.02 % Interchannel Isolation (Stereo Cross Talk) Better -60 dB *Software selectable input gain from -3db to +19.5dB in 1.5 dB steps Audio interfaces Microphone input and A/D conversion typical values Parameter Value Unit Input clipping level (at input gain 0 dB and microphone gain 21dB)* 0.111 -26.9 VPP dBu Analog input impedance (differential) 18 kΩ Frequency response (-3dB) @48 kHz sample rate PCM 21..22'750 Hz Analog line input signal-to-noise ratio (SNR) -73 dB Dynamic Range (16 bit theoretical) 96 dB Input Total Harmonic Distortion (THD @ -3dBFS) 0.018 % * Software selectable input gain on microphone input Audio interfaces Line output and D/A conversion typical values Parameter Value Unit Full Scale Output Voltage (Peak-to-peak) unloaded * 2.39 0.844 0.745 VPP VRMS dBu Analog output impedance tbd Ω Frequency response (-3dB) @ 48 kHz sample rate PCM 20..21500 Hz Output signal-to-noise ratio (SNR) >92 dB Dynamic Range (16 bit theoretical) 96 dB Output Total Harmonic Distortion (THD @ -3dBFS) 0.029 % Interchannel Isolation (Stereo Cross Talk) Better -66 dB *Output level (software controllable) set to max. Mechanical Dimensions Weight 14 grams / 0.494 oz. Min. 950 000h acc. to MIL217F at 40° Parameter Length Height Width Unit Complete Printed Circuit Board 56.1 2.2 11.44 0.45 33.0 1.3 mm inch Printed Circuit Board only 1.27 0.05 mm inch Connector height above PCB component side 8.9 0.35 mm inch Connector height above PCB rear side 1.27 0.05 mm inch Component height max above PCB 5.6 0.22 mm inch
Preliminary Development – BARIX IP AUDIO MODULE 400 – V 02.20 – 9.April.2018 Technical Data 15 MTBF calculations Parameter Value Unit MTBF calculated according to MIL217F - Calculated Supply Voltage 3.3 VDC Calculated Temperature (ambient) 25 77 ° C ° F Calculated Temperature (inside device, e.g. Barix Instreamer) 40 104 ° C ° F Calculation for Ground Mobile Device TBD hours Calculation for Ground Fix Device 950000 hours Environmental Parameter Value Unit Operating Temperature Range -20…+65 -4…149 ° C ° F Operating Humidity Range (non-condensing) 0..70 % Storage Temperature Range 0...+70 32....158 ° C ° F Storage Humidity Range (non-condensing) 0...70 % Core frequency versus Temperature variation (CPU load: 100%) Core frequency versus Temperature variation (CPU load: 50%) 10030050070090011001300-40 -30 -20 -10 0 5 10 15 20 25 30 35 40 45 50 55 60 65Core 1 freq.(MHz) Core 2 freq.(MHz)Core 3 freq.(MHz) Core 4 freq.(MHz)t (° C) f (MHz) 10030050070090011001300-40 -30 -20 -10 0 5 10 15 20 25 30 35 40 45 50 55 60 65Core 1 freq.(MHz) Core 2 freq.(MHz)Core 3 freq.(MHz) Core 4 freq.(MHz)f (MHz) t (° C)
Preliminary Development – BARIX IP AUDIO MODULE 400 – V 02.20 – 9.April.2018 Technical Data 16 FCC WARNING 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. Any changes or modifications not expressly approved by the party responsible for compliance c ould void the user's authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, 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 turning 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. To maintain compliance with FCC’s RF Exposure guidelines, This equipment should be installed and operated with minimum distance between 20cm the radiator your body: Use only the supplied antenna. Changes or modifications made to this equipment not expressly approved by (BARIX) may void the FCC authorization to operate this equipment FCC ID: 2APAE-IPAM400 Certifications / Compliances Complies with RoHS FCC ID RED CE
Preliminary Development – BARIX IP AUDIO MODULE 400 – V 02.20 – 9.April.2018 Ordering Information IPAM 400 2017.9xxx © 2017 Barix AG, Dübendorf, Switzerland. All rights reserved. All trademarks belong to their respective owners and are used for reference only. Barix and Barix IP Audio Module are trademarks of Barix AG, Switzerland and are registered in certain countries. Newest information about our devices is available via download from our website, www.barix.com. We explicitly reserve the right to change and improve the product without notice. Barix AG Ringstrasse 15a 8600 Dübendorf SWITZERLAND T +41 43 433 22 11 F +41 44 274 28 49 www.barix.com sales@barix.com support@barix.com

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