Laird Audio Development Kit (ADK)
Contents
1. Laird Laird Audio Development Kit ADK User Guide Part DVK BTM511 Applicable to the following Bluetooth module part numbers BIM511 Revision O7 and later global local Americas 1 800 492 2320 Europe 44 1628 858 940 Hong Kong 852 2923 0610 Embedded Wireless Solutions Support Center http ews support lairdtech com www lairdtech com bluetooth Laird Audio Development Kit ADK User Guide CONTENTS Laird Audio Development Kit ADK cccccsseccecssseeeceeseeeeeeeeeeneeseeeteegecsteeuseeeneaeseteegeeseeegeeserenseeeteaneesees 3 T e E 3 PE eng ee O e 3 Be Pa en EE 3 2 ADK Main Development Board 4 3 Getting to know the Development Board 4 A PONET 6 5 EE 5 BD UBER e Nan T a E e a EEEe 6 E ONIE e E E E E E E 7 Z Imen ae e ae ug O E 8 Dok Ee 8 EE eege ee 9 7 3 Differential input J12 on ADK labeled DIFF_IN cc c cccecesseseseesessscesenseseeeeseseeseeuseesenseseeeeeesenss 9 7 4 SPl Interface J16 on ADK labeled ob 9 7 5 Audio Connectors Labeled LINE_In MICINangdSfEREO OUT 9 LO POSTE ON Soares NE E E E AEE E EA AE E 10 7 7 Board Configuration JUIMID EE 10 ENEE Eege 12 EIERE 12 8 1 Power Consumption Measurement EE 12 o UBA e n EA E E E E E E Oe ere ee 13 9 Additional DOCUMEMCALION issascieh cia secat snes otasanedccasscnnetesenhccdacueietedeinddaudleceactle caxebentusisaetebetaksand sdesaMeveuebedans 13 Laird Embedded Wireless Solutions 2 Americas 1 800 492 2320 Supp2. Laird Embedded Wireless Solutions 5 Americas 1 800 492 2320 Support Center Europe 44 1628 858 940 http ews support lairdtech com Hong Kong 852 2923 0610 www lairdtech com bluetooth Laird Audio Development Kit ADK User Guide 5 USB RS232 SERIAL INTERFACE The ADK provides USB to Virtual COM port conversion through a FTDI chip and any Windows PC XP or later will auto install the necessary drivers and if your PC cannot locate the drivers you can download them from http Awww ftdichip com FTDrivers htm The development board contains a USB to UART interface on the RX TX CTS RTS DTR DSR RI and DCD signals In default setting the FTDI is on by having the J8 open no jumper so providing a USB to virtual COM port for evaluation through standard USB cable See Figure 3 The UART interface on the BTM511 module can be driven from external microcontroller instead of the on board FTDI FT232R chip U3 if the DVK is powered from DC jack and SW1 Figure 2 is in position DC At a minimum RX TX RTS and CTS need to be connected J15 for this use case Modem control lines J19 are optional NC7S2Z125 MODULE_RX USB_RTS Fe MODULE_CTS USB _DTR gt GPIO_3 DSR T BTM51x USB_RX MODULE TX V FT232R factory default USB_CTS MODULE RTS configuration USB DSR GPIO_8 DTR USB DCD GPIO_2 DCD USB_GPIO_4 RI GPIO_4 RI Figure 3 USB to UART Interface Laird Embedded Wireless Solutions 6 Americas 1 8
3. d e a jumper on the middle and right side pins for 1 8 V operation J7 J7 INTERNAL USE ONLY Default state is J8 open no jumper for use with USB power and on board FTDI 1 Alternatively the UART interface on the BTM511 module can be driven J8 RS232 OFF from external microcontroller instead of the on board FTDI FT232R chip U3 by powering the DVK via DC jack and setting SW1 Figure 2 to DC At a minimum RX TX RTS CTS and GND need to be connected J15 for this use case Place a jumper on the middle and left side pins to set audio amplifier J9 enabled pin to 3 3 V Place a jumper on the middle and right side pins to J9 set audio amplifier to be controlled by GPIO 7 3 3V GPIO7 SC Note This second option is not implemented in current firmware version 18 1 3 0 Place jumper across J10 J11 closed to select audio amplifier gain as J10 J10 listed on silkscreen table below J11 Place jumper across J10 J11 closed to select audio amplifier gain as J11 J11 listed on silkscreen table below J11 J12 DIFF_IN Differential stereo audio input J13 J13 INTERNAL USE ONLY J14 N A INTERNAL USE ONLY Laird Embedded Wireless Solutions 10 Americas 1 800 492 2320 Support Center Europe 44 1628 858 940 http ews support lairdtech com Hong Kong 852 2923 0610 www lairdtech com bluetooth Laird Audio Development Kit ADK User Guide J15 J15 Through hole plated UART interface for use when direct access to the UART pins
4. from an external microcontroller UART pins supported on J15 are GND RTS NC RXD TXD CTS Additional UART lines on J19 Please see notes on J8 J16 SPI INTERNAL USE ONLY J17 J17 Place a jumper on left hand side and middle pins to set VDDIO to 3 3 V 3V3 1V8 Place a jumper on middle and right hand side pins to set VDDIO to 1 8 V J18 PCM 12S Please see the PCM 12S section J19 J19 Through hole plated UART interface modem control lines for use when direct access to the UART pins from an external microcontroller is required UART pins supported on J19 are DCD DTR DSR and RI Additional UART lines on J15 Please see notes on J8 J20 USB_D USB_D USB access can be provided to allow a direct USB connection to a Bluetooth HCI module Note If this is done and the unit is connected to a USB host port it will be powered from that same port Do not attempt to use any other power source for the development kit when operating in this mode This is not relevant for modules with a UART interface J21 J21 Do not close J21 by placing a jumper J21 is not fitted by default to prevent a short circuit caused by accidentally closing the headers with a jumper Full details are available in Section 8 1 Laird Embedded Wireless Solutions 11 Americas 1 800 492 2320 Support Center Europe 44 1628 858 940 http ews support lairdtech com Hong Kong 852 2923 0610 www lairdtech com bluetooth Laird Audio Development Kit ADK User Guid
5. 00 492 2320 Support Center Europe 44 1628 858 940 http ews support lairdtech com Hong Kong 852 2923 0610 www lairdtech com bluetooth Laird Audio Development Kit ADK User Guide 6 SOFTWARE The development board connects the BTM511 module to a virtual COM port of a PC or other device From a PC you can communicate with the module using any Terminal Emulator software such as HyperTerminal Procomm or the supplied EZURIO Laird Terminal application EZURIO Laird Terminal is a terminal emulation application capable of running on Windows 98 Me 2000 XP Windows 7 and Windows 8 operating systems It was developed specifically to aid development and testing of Laird modules It allows connection to serial devices using any combination of the communications parameters listed in Table 1 Table 1 Communication Parameters COM Port 1 to 255 Baud rate 300 to 921600 Parity None Odd Even Data Bits 7or8 Stop Bits 1 or 2 Handshaking None or CTS RTS The benefits of using EZURiO Laird Terminal include Continually displayed status of DSR CTS DCD and RI Direct control of DTR on the host PC via a check box Direct control of RTS e Sending of BREAK signals Scripts can be run to assist Additional built in features accelerate development Laird includes a Data Transfer Test mode allowing data to be sent as fast as the handshaking permits This feature is useful for testing the bit transfer rate of a Bluetooth con
6. PIO i rE VS ee as A ECH 7 S i ERR af g 2 as Speaker dB PO 6d v M 3 Jt E wei es 7 2 SP TECHNOLOGIES p o z s e S z aaa amp amp amp bi ECCI d AN DC Jack d deit K Figure 1 Main ADK Board Reset PCMA2S SPI Laird Embedded Wireless Solutions 4 Americas 1 800 492 2320 Support Center Europe 44 1628 858 940 http ews support lairdtech com Hong Kong 852 2923 0610 www lairdtech com bluetooth Laird Audio Development Kit ADK User Guide 4 POWER SUPPLY Input Voltage 4 5V 5V 5 5 V The development board has two options for providing power to the module 5V power from a USB port Power from an external mains power block via a 2 0 mm DC connector The developer kit includes a USB cable to provide power to the development board It should be plugged into a PC USB port a USB hub or a mains adaptor with a USB output If a hub is used it should be a powered USB hub to ensure that sufficient current is available at the port being used The BTM511 module can be driven by the current available at a standard USB port Switch SW1 is used to select between USB or DC jack power source DC USB 4 SWi eee eye Figure 2 SW1 Settings SW 1 slide switch provides the selection of input power for BTM511 module from USB or DC jack The power for the U3 FT232R is always powered by the USB bus SW2 push button TACT switch provides a reset signal to the BTM511 module
7. e 7 8 SW Switches SW 1 Is the power switch on board the BTM51X DVK Its function is explained in Table 6 Table 6 SW7 Position SW 1 DC USB Switch to select power input from DC jack or USB connector SW7 and SW8 control which input lines are connected to the BTM510 511 module The positioning of the switch determines whether the channel is placed in Line Diff or Mic mode and therefore what signal lines are connected Table 7 explains the function of SW7 and SW8 Table 7 SW7 and SW8 positions MIC_AN_C MIC_AP_C LINE Top CONA4 2 me IN AGND DIFF Middle J12 3 DIFF_IN L_N J12 2 DIFF_IN L_P MIC Bottom CON5 2 MIC_IN CON5 1 MIC_IN AGND MIC_BN_C MIC_BP_C LINE Top CONA4 3 Line_IN AGND DIFF Middle J12 6 DIFF_IN R_N J12 5 DIFF_IN R_P MIC Bottom AGND AGND 8 OTHER FEATURES 8 1 Power Consumption Measurement J21 pin 2 provides the output voltage of current sensing amplifier U17 INA216A4 Current is measured by voltage drop over the parallel resistors R64 R65 0 51 Ohm each R64 and R65 can be seen as one 0 255 Ohm resistor With the gain of U17 which is 200 the following formula results voltage_J21 200 0 255 A Or simplified voltage_J21 51 A Note 1 The parameters of this DVK are optimised for measuring average low currents If the intention is to measure current patterns e g for sniff mode investigation higher currents the bandwidth of this de
8. e in manufacturing test 7 5 Audio Connectors Labeled LINE In MIC_IN and STEREO OUT These 3 5 mm audio connectors on the right side of the ADK allow OEMs to connect standard speakers microphones and headphones Laird Embedded Wireless Solutions 9 Americas 1 800 492 2320 Support Center Europe 44 1628 858 940 http ews support lairdtech com Hong Kong 852 2923 0610 www lairdtech com bluetooth Laird Audio Development Kit ADK User Guide 7 6 Push Buttons Table 4 Push buttons SW2 RESET Button to reset the BTM511 module SW3 GPIO 5 Push button for use of associated GPIO line for a range of configurable functionality SW4 GPIO 1 Push button for use of associated GPIO line for a range of configurable functionality Push button for use of associated GPIO line for a range of configurable functionality Note Contrary to remaining push buttons the pull up resistor R29 for GPIO 7 is not W PIO 7 PA SES fitted per default In future use GPIO7 may function as an output to control the audio amplifier U7 see J9 SW6 GPIO 6 Push button for use of associated GPIO line for a range of configurable functionality 7 7 Board Configuration Jumpers Table 5 Jumpers J1 J3 N A Unused on the development board J4 J4 INTERNAL USE ONLY j5 Js Provides provide voltage drop on 3 3 V across 0 25 ohm to measure the current for the BTM511 module when open Place a jumper on the middle and left side pins for 3 3 V operation Place
9. es serial communications via a FTDI USB RS232 Type A to Type B converter chip The audio cable is one option for connecting one of the Line in MIC Speaker ports 3 5mm Audio cable to an external media device with 3 5mm audio jack socket Provides links to additional information including the BTM511 User Manual terminal Web link Card utilities schematics quick start guides and firmware release notes Laird Embedded Wireless Solutions 3 Americas 1 800 492 2320 Support Center Europe 44 1628 858 940 http ews support lairdtech com Hong Kong 852 2923 0610 www lairdtech com bluetooth Laird Audio Development Kit ADK User Guide 2 ADK Malin DEVELOPMENT BOARD The development board allows the Laird Bluetooth module to connect to a PC The development board provides USB to Virtual COM port conversion through a FTDI chip Any Windows PC XP or later auto installs the necessary drivers if your PC cannot locate the drivers you can download them from http Awww ftdichip com FTDrivers htm 3 GETTING TO KNOW THE DEVELOPMENT BOARD SW 7 Left Channel RS232 SW8 Right Channel Differential Input g BTN511 DYK NO4 o J20 40 PHE p Nn S gg 5 USB SS SS HR rip BB Bal cts mz oS oem EI otis cs B wis oo a A Se 1 w HS d S r E eiee ee n Nyc GPIO _6 Le sw ml sel Tm P Red o der BER E Input uf 3N3 iy Emnin p motete e S ED J10 g g LEDI HIE K aH Jr Jr Em opio 7 G
10. l Firmware Release Notes BTM510 511 to v18 1 x x ADK Audio Development Kit Schematics BT TM511 ADK Quick Start Guide A2DP amp AVRCP B M511 ADK Quick Start Guide HFP BTM511 ADK Quick Start Guide SPP For any additional question or queries or to receive local technical support for the ADK or BTM511 module please contact wirelessinfo lairdtech com Copyright 2015 Laird Technologies Inc All rights reserved The information contained in this manual and the accompanying software programs are copyrighted and all rights are reserved by Laird Technologies Inc Laird Technologies Inc reserves the right to make periodic modifications of this product without obligation to notify any person or entity of such revision Copying duplicating selling or otherwise distributing any part of this product or accompanying documentation software without the prior consent of an authorized representative of Laird Technologies Inc is Strictly prohibited All brands and product names in this publication are registered trademarks or trademarks of their respective holders This material is preliminary Information furnished by Laird Technologies in this specification is believed to be accurate Devices sold by Laird Technologies are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only Laird Technologies makes no warranty express statutory and implied or by de
11. nection The EZURiO Laird Terminal application can be downloaded from the Software Downloads tab of the BTM51x webpage http Avww lairdtech com products btm5 1x series You will need to login or register for access Laird Embedded Wireless Solutions 7 Americas 1 800 492 2320 Support Center Europe 44 1628 858 940 http ews support lairdtech com Hong Kong 852 2923 0610 www lairdtech com bluetooth Laird Audio Development Kit ADK User Guide 7 INTERFACE SPECIFICATION 7 1 RS232 Serial signals The digital RS232 Serial signals are contained in J15 J19 as shown in Table 2 Note The direction is from the module s perspective Table 2 RS232 Definitions Pin 1 GND Ground Pin 2 RTS Request To Send Output Pin 3 NC No Connection Pin 4 RXD Receive Data Input Pin 5 TXD Transmit Data Output Pin 6 CTS Clear To Send Input N9 ag 319 Description rection Shared with Pin 1 DCD Data Carrier Detect Output GPIO2 Pin 2 DTR Data Terminal Ready Output GPIO8 Pin 3 DSR Data Set Ready Input GPIO3 Pin 4 RI Ring Indicator Output GPIO4 The format of the holes allows the fitting of your choice of connectors or can be used for directly soldering test wires to the board Pins are laid out on a standard 2 54 mm 0 1 inch pitch Laird Embedded Wireless Solutions 8 Americas 1 800 492 2320 Support Center Europe 44 1628 858 940 http ews support lairdtech com Hong Kong 852 2923 0610 www lairdtech com bluetoo
12. ort Center Europe 44 1628 858 940 http ews support lairdtech com Hong Kong 852 2923 0610 www lairdtech com bluetooth Laird Audio Development Kit ADK User Guide LAIRD AUDIO DEVELOPMENT KIT ADK Part DVK BTM511 Applicable to the following Bluetooth module part numbers BTM511 Revision 07 onwards 1 OVERVIEW Laird s Audio Development Kit ADK provides a platform for rapid wireless connectivity prototyping providing multiple options for the development of Bluetooth stereo and mono audio applications This manual is for the first production release of the development board PCB and relates to BTM511 DVK V04 on the PCB itself The complete functionality of the ADK hardware requires the use of Laird BTM511 firmware revision 07 firmware v18 1 3 0 or greater 1 1 Introduction The Laird ADK is designed to support the rapid development of applications and software for the specific Laird Bluetooth module part number BTM511 More information regarding this product including a detailed module User s Manual is available from the following link http Awww lairdtech com products btm5 1x series 1 2 Package Contents All kits contain the following items The motherboard has the BTM511 module already soldered onto it and exposes all Development Board the various hardware interfaces available The USB cable is one option for providing power for the ADK via the on board USB cable connector The cable also provid
13. scription regarding the information set forth herein Laird Technologies reserves the right to change specifications at any time and without notice Laird Technologies products are intended for use in normal commercial and industrial applications Applications requiring unusual environmental requirements such as military medical life support or life sustaining equipment are specifically not recommended without additional testing for such application Limited Warranty Disclaimer Limitation of Liability Laird Embedded Wireless Solutions 13 Americas 1 800 492 2320 Support Center Europe 44 1628 858 940 http ews support lairdtech com Hong Kong 852 2923 0610 www lairdtech com bluetooth
14. sign response to fast changing currents is insufficient In that case a current sensing amplifier with less gain but higher bandwidth should be utilised see INA216A data sheet J5 allows to do this externally Note 2 This only measures the current consumption of the module and not of the level shifter or other peripheral circuitry Laird Embedded Wireless Solutions 12 Americas 1 800 492 2320 Support Center Europe 44 1628 858 940 http ews support lairdtech com Hong Kong 852 2923 0610 www lairdtech com bluetooth Laird Audio Development Kit ADK User Guide 8 2 USB Access USB access can be provided to allow a direct USB connection to a Bluetooth HCI module To enable this operation close J8 by placing a jumper on the pins If this is done and the unit is connected to a USB host port it will be powered trom that same port Do not attempt to use any other power source for the development kit when operating in this mode Note This is not relevant for modules with a UART interface 9 ADDITIONAL DOCUMENTATION Laird offers a variety of documentation and ancillary information to support our customers through the initial evaluation process and ultimately into mass production Software and documentation are available on the BTM51X product page at http Awww lairdtech com products BTM51X series Additional documentation includes BTM511 Class 2 Audio Multimedia Module Datasheet BTM510 511 User Manua
15. th Laird Audio Development Kit ADK User Guide 7 2 PCM 12S The development board provides for a PCM 12S interface for the BTM511 The pins provide the developer with access to the module s I2S or PCM lines as well as providing power for additional audio hardware to be developed I2S signals are mapped to the PCM pins of BTM51x as outlined in this table Table 3 BTM5 1x pins and 12S Signals SD_IN PCM_IN 3 5 I2S Serial data in SD_OUT PCM_OUT 4 7 I2S Serial data out WS PCM_SYNC 5 6 I2S Word select right left ch SCK PCM_CLK 6 4 I2S clock GND 1 2 3 4 9 22 13 47 10 GND Note For backward compatibility reasons remaining pins of J18 are connected to signals that are not directly related to PCM I2S functions 7 3 Differential input J12 on ADK labeled DIFF_IN If the audio input should be driven by a differential audio source rather than a single ended signal J12 allows connecting non inverted P and inverted ONT signal of the source to BTM511 as well as AGND analogue GND for left and for right channel In addition SW7 and SW8 must be set to middle position DIFF Differential signals provide better audio quality due to better noise immunity 7 4 SPI Interface J16 on ADK labeled SPI This interface is only utilized for Lade internal use and production testing We do not recommend that the OEM use these pins Note J14 J13 labelled SPIVVCC and J4 are similarly only used for Laird internal us
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