KC Wirefree BTAUDIO BTAUDIO User Manual BTAUDIO UserGuidex
KC Wirefree Corporation BTAUDIO BTAUDIO UserGuidex
User Manual
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| Document ID | 2565574 |
| Application ID | PonzNq1RjkxJxEC0LZcAdg== |
| Document Description | User Manual |
| Short Term Confidential | No |
| Permanent Confidential | No |
| Supercede | No |
| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 85.48kB (1068457 bits) |
| Date Submitted | 2015-03-25 00:00:00 |
| Date Available | 2015-03-25 00:00:00 |
| Creation Date | 2014-12-23 15:52:33 |
| Producing Software | Acrobat Distiller 11.0 (Windows) |
| Document Lastmod | 2015-03-23 18:17:57 |
| Document Title | Microsoft Word - BTAUDIO UserGuide.docx |
| Document Creator | PScript5.dll Version 5.2.2 |
| Document Author: | Chris |
BT Audio Module User Guide Class 1 Bluetooth Audio Module Description The BT AUDIO‐5112 Class 1 Bluetooth Hi Power Audio Module is a highly tuned and completely integrated wireless audio transceiver subsystem ready for installation in audio devices. The BT AUDIO‐5112 is a pre‐engineered subsystem integrating a wireless radio, digital audio system, and programmed firmware profiles that define features, configurations, and user interface. All firmware offered by KC Wirefree can be customized for OEM clients. In many cases a few changes can produce great value by differentiating and improving your product. Firmware can be updated via USB. kcAudioGateway Firmware Edition The kcAudioGateway firmware is a transmitter system, offering A2DP source profile or AGHFP gateway profile (default), but not both simultaneously. A2DP mode provides stereo transmission to Headset/Speaker devices. Stereo audio is sampled from the MIC_L+, MIC_L‐, MIC_R+, and MIC_R‐ pins at 44.1kHz, and will automatically transmit to a Headset device. AGHFP mode (default) provides two‐way voice communications, sampled at 8kHz, to a standard Bluetooth cell phone headset. Additionally, the Headset Voice Command prompt will toggle a PTT pin on kcAudioGateway, which enables standard Bluetooth cell phone headsets to provide a PTT function. Please refer to our kcAudioGateway User Guide for details. kcAudioHeadset Firmware Edition The kcAudioHeadset firmware is a receiver system, offering A2DP sink profile, and HFP profile. It can receive an A2DP wireless stereo signal, decompress, and convert to analog audio available on the SPK_L+, SPK_L ‐, SPK_R+, and SPK_R‐ pins. Additionally, it can “answer” phone calls, which will pause any A2DP stream, and switch modes, now providing two way mono communication channel. Please refer to our kcAudioHeadset User Guide for details. www.kcwirefree.com Version December 19, 2014 Page 1 BT Audio Module User Guide Class 1 Bluetooth Audio Module Dimensions & Layout BT AUDIO‐5112 Top View GND ANT GND 42 41 35 MIC_R- PIO8 34 MIC_L+ PIO9 33 MIC_L- PIO10 32 MIC_BIAS LED_BLU 10 31 PCM_IN LED_RED 11 30 PCM_CLK UART_RTS 12 29 PCM_OUT UART_CTS 13 28 PCM_SYNC UART_TXD 14 27 USB+ UART_RXD 15 26 USB- 3V3_OUT 16 25 CHARGE www.kcwirefree.com 24 23 MIC_R+ PIO7 SPI_CLK 36 SPI_MISO 22 SPK_L- PIO6 SPI_MOSI 37 21 SPI_CSB SPK_L+ PIO5 20 SPK_R- 38 19 39 ENABLE 18 PIO4 VDD SPK_R+ 17 PIO3 2.8 6.1 1.8 40 GND RESET PIO2 43 15.0 MM 6.1 24.6 21.0 PADS 1.0 X 2.0 1.4 1.8 2.6 Version December 19, 2014 9.8 2.6 Page 2 BT Audio Module User Guide Class 1 Bluetooth Audio Module Pin Assignments Pin 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Function PIO2 PIO3 PIO4 PIO5 PIO6 PIO7 PIO8 PIO9 PIO10 LED_BLU LED_RED UART_RTS UART_CTS UART_TXD UART_RXD 3V3_OUT GND RESET VDD ENABLE SPI_CSB SPI_MOSI SPI_MISO SPI_CLK CHARGE USB‐ USB+ PCM_SYNC PCM_OUT PCM_CLK PCM_IN Type I/O I/O I/O I/O I/O I/O I/O I/O I/O Input Input Output Input Output Input Output ‐‐ Input Input Input Input Input Output Input Input I/O I/O I/O Output I/O Input Description Programmable I/O Programmable I/O Programmable I/O Programmable I/O Programmable I/O [I2C] Programmable I/O [I2C] Programmable I/O [I2C] Programmable I/O Programmable I/O Blue LED Drain Red LED Drain UART Request To Send UART Clear To Send UART Data Transmit UART Data Receive Onboard 3.3V Regulator Output Ground Reset (Active Low >5ms) VDD/Battery Input (2.9V – 4.4V) System Enable (with internal latch) SPI Chip Select SPI Master Out SPI Master In SPI Clock Battery Charging Supply (only use when VDD is battery powered) USB Data Negative USB Data Positive PCM Sync [I2S WS] PCM Out [I2S Out] [SPDIF Out] PCM Clock [I2S Clk] PCM In [I2S In] [SPDIF In] 32 33 34 35 36 37 38 39 40 41 42 43 MIC_BIAS MIC_L‐ MIC_L+ MIC_R‐ MIC_R+ SPK_L‐ SPK_L+ SPK_R‐ SPK_R+ GND ANT GND Output Input Input Input Input Output Output Output Output ‐‐ I/O ‐‐ Microphone Bias Audio Input Left Negative Audio Input Left Positive Audio Input Right Negative Audio Input Right Positive Audio Output Left Negative Audio Output Left Positive Audio Output Right Negative Audio Output Right Negative Ground 50 Ohm 2.4GHz Antenna Port Ground [Option features in brackets] www.kcwirefree.com Version December 19, 2014 Page 3 BT Audio Module User Guide Class 1 Bluetooth Audio Module Interface Pins PIO Pins [1‐9] PIO pins are LOW by default, and button presses used for device operation are HIGH signals. PIO inputs are debounced to 20ms. Several PIO pins are assigned functions in default versions of firmware. Custom programmed functions are available. Inputs can be configured for weak pull‐up, weak pull‐down, strong pull‐up, strong pull‐down. Voltage input tolerance and output level is directly related to the VDD level. Specific functions are enabled on designated PIO pins depending on firmware version. Please refer to the specific firmware Audio User Guides for complete information regarding PIO features and assignments. LED Pins [10‐11] Two open‐drain LED output pins are available. The LED's need a positive 3.3V (maximum) supply, and a current limiting resistor. UART Pins [12‐15] The UART is compatible with the 16450 industry standard. Upcoming kcAudio firmware will implement an AT Command set for configuration and operation. 3V3_OUT Pin [16] The module has several onboard regulators. The onboard 3V3 regulator supplies the PIO, PCM, SPI, UART, and USB Pins. The class 2 module has up to 100mA available from this pin. The class 1 module also uses the onboard 3V3 regulator to supply the RF Power Amp, and has less than 30mA available from this pin. GND Pin [17] VSS ground plane. RESET Pin [18] The module will reset when pulled LOW >5ms. VDD Pin [19] Minimum VDD is 2.9V. Supplies several onboard regulators, and is also the designated Battery P terminal if powering directly from a Lithium Ion battery. The VDD pin may receive a recharge current supply when the voltage reading from this pin measures below 4.0V, the CHARGE Pin is connected to a power supply, and firmware has enabled battery monitoring and charging (default behavior). This VDD pin supplies the onboard Seiko S‐1112 LDO 3V3 regulator. Note: the Seiko S‐1112 has a 200mV dropout, so if VDD is < 3.5V, then the 3V3 supply rail will have a 0.2V dropout. The 3V3 rail supplies PIO, PCM, SPI, UART, and USB Pins. Power supply to module should have less than 10mVrms noise between 0‐10MHz, and spikes should be minimal. www.kcwirefree.com Version December 19, 2014 Page 4 BT Audio Module User Guide Class 1 Bluetooth Audio Module ENABLE Pin [20] Enables internal voltage regulators. The ENABLE pin can be utilized in two different ways. Our current default firmware uses the ENABLE pin in Switch Power Mode, where it should be tied to the VDD pin, and used with an external power switch. In Switched Power Mode, our BTB functions are typically assigned to PIO 4. Please see specific firmware User Guides for details regarding PIO function assignments. Alternatively, firmware can utilize the ENABLE pin in Battery Power Mode, which uses a momentary ON/OFF button to power up. Once powered up, the internal voltage regulators will latch on, and then the ENABLE pin is used for BTB assigned functions. This is typically intended for a battery powered headset application with minimal buttons. Separate firmware must be used that assigns this behavior to the ENABLE pin. SPI Pins [21‐24] We highly recommend including test points for the four SPI signals, used for firmware loading and diagnostics. The SPI interface is unavailable for general usage, and only interfaces with chip manufacturer diagnostic applications. CHARGE Pin [25] Provide power supply for battery charging, when a battery is connected to VDD, and firmware enables battery monitoring and charging function (enabled by default). Do not connect without a Lithium Ion battery connected to VDD Pin. USB Pins [26‐27] These interfaces are available with custom configuration. USB can be programmed for plug‐n‐play operation using standard USB Audio drivers available on PC, Mac, and Linux. PCM Pins [28‐31] Pins are generally 3.3V level logic (dependent upon VDD). MIC_BIAS Pin [32] Provides a DC bias intended for electret microphones. Configurable 1.8V – 3.3V (default = 2.69V) with a current of 200uA – 1.229mA (default = 0.672mA). MIC Pins [33‐36] Microphone or line level analog audio input. Impedance is 6.0kΩ ‐ 30kΩ depending on volume setting. ADC operates at 8, 11.025, 16, 22.05, 32, and 44.1kHz. Input signal should be 4mVrms – 800mVrms. Input gain is adjustable from SPK Pins [37‐40] Output gain is adjustable from ‐45dB to +3.5dB. RF Port [41‐43] The module already contains a balun‐filter onboard, so the antenna port only requires a standard 2.4 GHz RF transmission line with a 50 ohm load. Design the antenna circuit according to the antenna manufacturer guidelines. Some designs may use a simple chip antenna without additional circuitry. Microstrip design is not critical if the antenna is less than 3mm from the RF pin. A few recommended chip antennas: Johanson 2450AT18B100E, Johanson 2450AT43A100E, or Antenova Rufa A5839. For PCB transmission line design, we recommend the following online calculator: http://www.emclabinfo.com/emc_calc/microstrip.htm www.kcwirefree.com Version December 19, 2014 Page 5 BT Audio Module User Guide Class 1 Bluetooth Audio Module Electrical Characteristics (Conditions VDD = 3.3V and 25 °C) Absolute Maximum Ratings Min Max Unit Storage temperature range ‐40 +105 °C Supply voltage VDD ‐0.4 4.4 Volts Supply voltage CHARGE 4.5 6.5 Volts Supply voltage ENABLE ‐0.4 4.9 Volts Recommended Operating Conditions Min Typical Max Unit Temperature range ‐40 20 +85 °C Supply voltage VDD 2.9 3.3 4.4 Volts Supply voltage CHARGE 4.5 ‐‐ 6.5 Volts Supply voltage ENABLE 2.5 ‐‐ 4.4 Volts Current Consumption Avg Unit Stereo 66 mA Mono Headset 36 mA No Connection mA 190 mA Peak current RF Characteristics Min Max Unit Carrier Frequency 2400 2483.5 MHz Transmission Line 50 50 Ω Transmission Power +20 dBm Receive Sensitivity ‐20 ‐98 dBm Min Typical Max Unit Output voltage full‐scale swing (differential) ‐‐ 750 ‐‐ mV rms Resolution ‐‐ ‐‐ 16 Bits Sample Rate ‐‐ 48 kHz SNR (@ 8KHz sampling) ‐‐ 95 ‐‐ dB Digital Gain ‐24 ‐‐ 21.5 dB Analog Gain ‐‐ ‐21 dB THD+N (@ 100kΩ load) ‐‐ 0.04 0.01 Audio DAC Characteristics www.kcwirefree.com Version December 19, 2014 Page 6 BT Audio Module User Guide Class 1 Bluetooth Audio Module Audio ADC Characteristics Min Typical Max Unit Input full scale at maximum gain (differential) ‐‐ 0.004 ‐‐ Vrms Input full scale at minimum gain (differential) ‐‐ 0.800 ‐‐ Vrms Resolution ‐‐ ‐‐ 16 Bits Sample Rate (8, 11.025, 16, 22.050, 32, 44.1kHz) ‐‐ 44.1 kHz SNR (@ 8KHz sampling) ‐‐ 79 ‐‐ dB Digital Gain ‐24 ‐‐ 21.5 dB Analog Gain ‐‐ ‐‐ 42 dB 3dB bandwidth ‐‐ 20 ‐‐ kHz Input impedance ‐‐ 6.0 30 Ω THD+N (microphone input) @30mV rms input ‐‐ 0.04 ‐‐ Programmable I/O Pins Operating Characteristics Min Typical Max Unit Input Voltage Low Logic ‐0.3 ‐‐ VDDLDO x 0.25 Volts Input Voltage High Logic VDDLDO x 0.625 ‐‐ VDDLDO + 0.3 Volts Output Voltage Low Logic ‐‐ 0.125 Volts Output Voltage High Logic VDDLDO x 0.75 ‐‐ VDDLDO Volts Output Current Low Logic ‐‐ 4.0 ‐‐ mA Output Current High Logic ‐‐ ‐4.0 ‐‐ mA Input Leakage Current ‐100 100 nA Input Schmitt voltage VDDLDO x 0.25 ‐‐ VDDLDO x 0.625 Volts 1.0 ‐‐ 5.0 pF Weak pull up 500K ‐‐ 2M Ω Weak pull down 500K ‐‐ 2M Ω Strong pull up 10K ‐‐ 50K Ω Strong pull down 10K ‐‐ 50K Ω www.kcwirefree.com Version December 19, 2014 Input Capacitance Page 7 FCC Statement: This equipment has been tested and found to comply with the limits for 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 to an outlet on a circuit different from that to which the receiver is connected. 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. Note: Modifications to this product will void the user’s authority to operate this equipment. RF Radiation Exposure Statement: 1.This Transmitter must not be co‐located or operating in conjunction with any other antenna or transmitter. 2.This equipment complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20 centimeters between the radiator and your body. FCC Information to OEM integrator The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the user manual of the end product. The user manual which is provided by OEM integrators for end users must include the following information in a prominent location. 1.To comply with FCC RF exposure compliance requirements, the antenna used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co‐located or operating in conjunction with any other antenna or transmitter, except in accordance with FCC multi‐transmitter product procedures. 2. Only those antennas with same type and lesser gain filed under this FCC ID number can be used with this device. 3. The regulatory label on the final system must include the statement: “Contains FCC ID:S22-BTAUDIO or using electronic labeling method as documented in KDB 784748. 4. The final system integrator must ensure there is no instruction provided in the user manual or customer documentation indicating how to install or remove the transmitter module except such device has implemented two‐ways authentication between module and the host system
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