DRAFT KC Class 2 Bluetooth Audio Module. Features. Bluetooth Audio Profiles. Custom Audio Profiles. Description

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1 Features CSR BlueCore5 chip set Bluetooth v.0 Class radio, range typically exceeds 0m +8dB PA Output RF Gain High speed wireless data rate up to Mbps Digital & analog stereo input Digital & analog stereo output 6-bit ADC/DAC stereo CODEC 9 programmable digital I/O pins 6 Mbit flash memory USB, UART, IC, IS, PCM, and SPDIF interfaces.6 mm x 5.0 mm x.7 mm External Antenna Bluetooth Audio Profiles ADP - Advanced Audio Distribution Profile Stereo streaming with SBC, MP, AAC, APT-X compression options. Source or Sink profile. AVRCP - Audio Video Remote Control Profile Standard remote audio playback controls. Controller or Target profile. HFP - Hands Free Profile Standard bi-directional mono cell phone headset profile. AGHFP - Audio Gateway to HFP Standard bi-directional mono cell phone gateway profile connects to HFP mono headsets. Custom Audio Profiles KCSI Profile Stereo + Intercom High speed, Channel audio -- full stereo streaming with live voice back channel. Live Stereo High speed, high quality stereo for real time applications TV, Video Games, Interactive Live Microphone/Guitar/Instrument A high speed, high quality mono channel perfect for live musical performance. Intercom Optimized for high quality wireless telephone or intercom service. Description The KC-60 is a highly tuned and completely integrated wireless audio transceiver subsystem ready for installation in audio devices. The KC-60 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. 0 KC Wirefree Page of 5 Version November, 0

2 Firmware Please see our Audio User Guide for more information on specific features and operation. kcaudioadapter Edition The kcaudioadapter firmware streams high quality stereo audio to a headset. It is fully compatible as a Bluetooth ADP "Source" device, and also supports AVRCP profile. The kcaudioadapter will transmit the analog audio from the LIN and RIN input pins, or optionally, from the digital audio from the USB or PCM interfaces. The stereo signal is then compressed, segmented into Bluetooth packets, and transmitted wirelessly to the kcaudioheadset. kcaudiogateway Edition The kcaudiogateway firmware provides two-way voice communications to a standard Bluetooth cell phone headset. It is fully compatible as a Bluetooth AGHFP device. The kcaudiogateway will transmit the analog mono audio from the LIN input pins, or optionally, as digital audio from the USB or PCM interfaces. The input signal is then compressed, segmented into Bluetooth packets, and transmitted wirelessly to a Bluetooth headset. Also, the microphone signal from the headset is received, and available through the LOUT output pins, or optionally as digital audio to USB or PCM. kcaudioheadset Edition The kcaudioheadset firmware will receive the wireless stereo signal, decompress, and convert to analog audio available on the LOUT and ROUT output pins. Optionally, the output can be directed to the USB or PCM interfaces. It is fully compatible as a Bluetooth ADP "Sink" device, and simultaneously as a Bluetooth HSP cell phone "Mono Headset" device supporting HFP profile. KCSI Stereo + Intercom Profile Additionally, we have a custom, patent pending, profile we call KCSI enabled by default. This profile is in addition to the standard Bluetooth profiles, and is included in both kcaudioadapter and kcaudioheadset firmware versions. Our patent pending KCSI profile is a real time Stereo + Intercom communication system. There are two major features in the KCSI profile that do not exist in standard Bluetooth ADP. Bluetooth v.0 does not have enough bandwidth for uncompressed stereo signals. The audio stream is compressed with either the Bluetooth default SBC (sub-band coding) codec, or our low latency audio codec when using our KCSI profile. We designed KCSI for real-time applications like gaming and television. KCSI is about three times faster than SBC, and the entire system provides audio with around 5ms wireless delay, which is under the perception time for lip sync problems. Second, we added a live intercom back channel. The kcaudioheadset when connected using the KCSI profile, will send the wireless microphone signal back to the kcaudioadapter. Thus, a mono audio signal connected to the kcaudioheadset LIN pin will be available on both LOUT and ROUT (dual mono) pins on the kcaudioadapter. KCSI Stereo + Intercom profile is selected by default when connected to another KCSI enabled device. 0 KC Wirefree Page of 5 Version November, 0

3 Physical Dimensions KC-60 Pinout Top View KC-60 Landing Pattern Top View PIO_ PIO_ GND RF GND 0 9 SPK_RP SPK_RN.8 mm. mm 5.0 mm mm.0 mm PIO_ 8 SPK_LP.0 mm PIO_5 7 SPK_LN PIO_6 5 6 MIC_RP PIO_7 6 5 MIC_RN PIO_8 7 MIC_LP PIO_9 PIO_0 LED_RED MIC_LN MIC_BIAS PCM_IN.6 mm LED_BLU 0 PCM_CLK UART_RTS 9 PCM_OUT UART_CTS 8 PCM_SYNC UART_TXD 7 USB_P UART_RXD 5 6 USB_N V_OUT 6 7 GND 8 RESET VDD 9 ENABLE 0 SPI_CSB SPI_MOSI SPI_MISO SPI_CLK 5 CHARGE.8 mm 0.8 mm.0 mm mm 0.8 mm.0 mm 0.8 mm 0 KC Wirefree Page of 5 Version November, 0

4 Pin Assignment Pin Function Type Description PIO_ I/O Programmable I/O PIO_ I/O Programmable I/O PIO_ I/O Programmable I/O PIO_5 I/O Programmable I/O 5 PIO_6 I/O Programmable I/O [I C] 6 PIO_7 I/O Programmable I/O [I C] 7 PIO_8 I/O Programmable I/O [I C] 8 PIO_9 I/O Programmable I/O 9 PIO_0 I/O Programmable I/O 0 LED_RED Input Red LED Drain LED_BLU Input Blue LED Drain UART_RTS Output UART Request To Send UART_CTS Input UART Clear To Send UART_TXD Output UART Data Transmit 5 UART_RXD Input UART Data Receive 6 V_OUT Output Onboard.V Regulator Output 7 GND -- Ground 8 RESET Input Reset (Active Low >5ms) 9 VDD Input VDD/Battery Input (.9V.V) 0 ENABLE Input Onboard Regulator Enable (Internal latch) SPI_CSB I/O SPI Chip Select SPI_MOSI I/O SPI Master Out SPI_MISO I/O SPI Master In SPI_CLK I/O SPI Clock 5 CHARGE Input Battery Charging Supply (Only use with battery powered VDD) 6 USB_DN I/O USB Data Negative 7 USB_DP I/O USB Data Positive 8 PCM_SYNC I/O PCM Sync [I S WS] 9 PCM_OUT Output PCM Out [I S Out] [SPDIF Out] 0 KC Wirefree Page of 5 Version November, 0

5 0 PCM_CLK I/O PCM Clock [I S Clk] PCM_IN Input PCM In [I S In] [SPDIF In] MIC_BIAS Output Microphone Bias MIC_LN Input Audio Input Left Negative MIC_LP Input Audio Input Left Positive 5 MIC_RN Input Audio Input Right Negative 6 MIC_RP Input Audio Input Right Positive 7 SPK_LN Output Audio Output Left Negative 8 SPK_LP Output Audio Output Left Positive 9 SPK_RN Output Audio Output Right Negative 0 SPK_RP Output Audio Output Right Negative [Option features in brackets] 0 KC Wirefree Page 5 of 5 Version November, 0

6 Interface Pins PIO Pins [-9] PIO pins are LOW by default, and button presses used for device operation are HIGH signals. Pins are generally.v level logic (dependent upon VDD). PIO inputs are debounced to 0ms. 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 our Audio User Guide for complete information regarding specific features and PIO assignments. LED Pins [0-] Two open-drain LED output pins are available. The LED's need a positive.v (maximum) supply, and a current limiting resistor. UART Pins [-5] The UART is compatible with the 650 industry standard. Upcoming kcaudio firmware will implement an AT Command set for configuration and operation. Pins are generally.v level logic (dependent upon VDD). V_OUT Pin [6] The module has several onboard regulators. The onboard V regulator supplies the PIO, PCM, SPI, UART, and USB Pins. The class module has up to 00mA available from this pin. The class module also uses the onboard V regulator to supply the RF Power Amp, and has less than 0mA available from this pin. GND Pin [7] VSS ground plane. RESET Pin [8] The module will reset when pulled LOW >5ms. VDD Pin [9] Minimum VDD is.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.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- LDO V regulator. Note: the Seiko S- has a 00mV dropout, so if VDD is <.5V, then the V supply rail will have a 0.V dropout. The V rail supplies PIO, PCM, SPI, UART, and USB Pins. ENABLE Pin [0] Enable onboard regulators to turn on the module. This ENABLE pin will latch up, so a momentary enable will provide the necessary power up. For switched power applications, this pin can be held high, and firmware must disable the power latch. 0 KC Wirefree Page 6 of 5 Version November, 0

7 SPI Pins [-] 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. Pins are generally.v level logic (dependent upon VDD). CHARGE Pin [5] 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 [6-7] 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 [8-] Pins are generally.v level logic (dependent upon VDD). MIC_BIAS Pin []. MIC Pins [-6]. SKR Pins [7-0]. RF Port [-] The module already contains a balun-filter onboard, so the antenna port only requires a standard. 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 mm from the RF pin. A few recommended chip antennas: Johanson 50AT8B00E, Johanson 50ATA00E, or Antenova Rufa A589. For PCB transmission line design, we recommend the following online calculator: 0 KC Wirefree Page 7 of 5 Version November, 0

8 Electrical Characteristics Absolute Maximum Ratings Min Max Unit Storage temperature range C Supply voltage VDD -0.. Volts Supply voltage CHARGE Volts Supply voltage ENABLE Volts Recommended Operating Conditions Min Typical Max Unit Temperature range C Supply voltage VDD pin.9.. Volts Supply voltage CHARGE pin Volts Supply voltage ENABLE pin Volts Current Consumption Avg Unit Stereo 6 ma Mono Headset 6 ma No Connection ma Peak current 70 ma RF Characteristics Min Max Unit Carrier Frequency MHz Transmission Line Ω Transmission Power 0 +8 dbm Receive Sensitivity dbm (Conditions VDD LDO =.V and 5 C) 0 KC Wirefree Page 8 of 5 Version November, 0

9 Electrical Characteristics - PIO, UART, SPI Pins Operating Characteristics Min Typical Max Unit Input Voltage Low Logic VDD LDO x 0.5 Volts Input Voltage High Logic VDD LDO x VDD LDO + 0. Volts Output Voltage Low Logic Volts Output Voltage High Logic VDD LDO x VDD LDO Volts Output Current Low Logic ma Output Current High Logic ma Input Leakage Current na Input Schmitt voltage VDD LDO x VDD LDO x 0.65 Volts Input Capacitance pf Weak pull up (default) 500K -- M Ω Weak pull down (default) 500K -- M Ω Strong pull up (optional) 0K -- 50K Ω Strong pull down (optional) 0K -- 50K Ω Note: The VDD pin supplies the onboard.v LDO regulator. VDD LDO is the voltage supplied to the chipset by the onboard regulator. So, if VDD <.5V, then VDD LDO = VDD 0.V 0 KC Wirefree Page 9 of 5 Version November, 0

10 Electrical Characteristics - Analog Audio Pins Audio ADC Characteristics Min Typical Max Unit Input full scale at maximum gain (differential) V rms Input full scale at minimum gain (differential) V rms Resolution Bits Sample Rate khz SNR (@ 8KHz sampling) db Digital Gain db Analog Gain db db bandwidth khz Microphone mode input impedance Ω THD+N (microphone rms input % Audio DAC Characteristics Min Typical Max Unit Output voltage full-scale swing (differential) V rms Resolution Bits Sample Rate khz SNR (@ 8KHz sampling) db Digital Gain db Analog Gain db THD+N (@ 00kΩ load) % 0 KC Wirefree Page 0 of 5 Version November, 0

11 Hardware Design Modules provide UART, USB, SPI, and PIO hardware interfaces. This section illustrates a typical implementation, and does not consider all cases. Our engineers are available to review designs and answer any other design questions. Contact our engineering department directly by tech@kcwirefree.com Antenna Design The KC-60 requires an external antenna that offers the most flexibility for design and placement. Surface mount chip antennas, or connectors placed within 6mm of the RF pin do not usually require comprehensive design. If the RF trace is longer than 6mm, then please follow proper microstrip or coplanar waveguide transmission line design calculations to ensure 50 ohms. Reference Our FCC Grant is valid when deploying any surface mount antenna with less than +.dbi gain. Avoid all metal traces, components, enclosures, and ground planes close to the antenna area which will negatively affect RF performance. Other materials can also negatively affect RF performance. 8mm is a minimal clearance area from metallic components or traces. Application Notes Power supply to module should have less than 0mV rms noise between 0-0MHz, and spikes should be minimal. 0 KC Wirefree Page of 5 Version November, 0

12 Circuit Example V V POWER SWITCH APPCLICATIONS CONNECT BTB BUTTON TO PIO_0 BATTERY POWER ON/OFF BUTTON CONNECT BTB BUTTON TO ENABLE SW BUTTON BTB MOM_S SW WITCH BUTTON VOLUP MOM_S SW5 WITCH BUTTON VOLDN MOM_S SW6 WITCH BUTTON REWIND MOM_S SW7 WITCH BUTTON 5 FORWARD MOM_S WITCH K K KC-50 KC-60 BLUE TOOTH MODULE OPTIONAL AT COMMAND INTE R FACE VIA UART POWE R SWITCH OPTION VDD A B BATTE RY ON/OFF BUTTON OPTION SW8 LITHIUM_P MOM_S WITCH SPI TEST POINTS FIRMWARE UPDATES DIGITAL AUDIO OPTIONAL US B AUDIO PCM, IS, SPDIF ANALOG AUDIO OUTPUT OPTIONAL AMPLIFIE R ANALOG AUDIO INPUT UF 5nH 7.5K OPTIONAL ATTE NUATION OPTIONAL NOISE FILTER 5nH STEREO OUTPUT.5MM JACK DIFFERENTIAL SPEAKER OUT INPUT.5MM JACK V.K FTR L 7.5K 0K.K R B.7UF 0.UF UF VCC VCCIO VOUT GND USBDM USBDP RESET OSCI OSCO TXD RXD 5 RTS CTS DTR DS R DCD 0 RI CBUS0 CBUS CBUS CBUS CBUS TEST GND 7 GND 8 GND V.UF 0.UF 0.UF 0.UF 0.UF 0K TPS6A.UF UF 5PF UF UF 5PF.K UF 5PF 5PF.0UF.UF RF PIO PIO PIO PIO5 PIO6 PIO7 PIO8 PIO9 LED_RED LED_BLU UART_RTS UART_CTS UART_TXD UART_R XD V_OUT SPK_R+ SPK_L- SPK_R- SPK_L+ MIC_L- MIC_R + MIC_R - MIC_L+ USB_D- MIC_BIAS PCM_IN PCM_CLK PCM_OUT PCM_SYNC USB_D+ CHARGE GND RESET VDD ENABLE SPI_CSB SPI_MOSI SPI_MISO SPI_CLK GND RF GND USB_5V AMP_E NABLE 9 PIO0 5 USB_N USB_P BEAD MICBIAS AMP_E NABLE ROUT_P ROUT_N LOUT_P LOUT_N INPUT_R INPUT_L USB-5V AGND ON OFF GND INL- INL+ INR+ INR- HPVDD CPP PGND CPN OUTR G0 G HPVSS VDD SGND OUTL EN USB USB 0 KC Wirefree Page of 5 Version November, 0

13 Bluetooth Pre Qualifications The KC-60 is registered with and licensed by Bluetooth SIG as a qualified design. Qualification Design ID: B0508 Bluetooth Version:. + EDR Qualified Profiles: ADP, AVRCP, BB, GAP, HCI, HFP, HSP, LCAP, LM, RFCOMM, SDP, SPP Usage of Bluetooth registered trademarks must be licensed directly from Bluetooth SIG. A no cost membership is currently offered for trademark usage, and no cost Bluetooth product listings are currently offered for products containing our pre-qualified Bluetooth modules. FCC The KC-60 is registered with and granted modular approval by the Federal Communications Commission. The KC- 60 meets the conducted and radiated emission requirements of the FCC "Code of Federal Regulations" Title 7, Part 5, Subpart C, Section 5.7 for Bluetooth spread spectrum transmitters. With a written agreement, Original Equipment Manufacturers may use our FCC ID transmitter license. The following FCC ID must be visible on the exterior of final the product. CE FCC ID: Approval Pending The KC-60 complies with the following EMC Directives: Industry Canada EN 00.8 V.6. (00-) [Approval Pending] IC Warning Statement: The device s user manual does not contain the following or equivalent statement as per RSS- GEN section 7..5: Operation of this device is subject to the following two conditions: () this device may not cause interference, and () this device must accept any interference, including interference that may cause undesired operation of the device. RoHS RoHS compliant. SAR SAR compliant. IC ID: [Approval Pending] 0 KC Wirefree Page of 5 Version November, 0

14 Datasheet Revisions Revision November, 0 Changes Draft. 0 KC Wirefree Page of 5 Version November, 0

15 Ordering Information Product Series Country of Manufacture KC-60 USA Order Part Number KC-60 -AA KC-60 -AG KC-60 -HS KC-60 -FW Description w/ Audio Adapter Firmware w/ Audio Gateway Firmware w/ Headset Firmware w/ Custom Firmware Contact Information KC Wirefree 60 W Medtronic Way Tempe, Arizona 858 (60) Phone info@kcwirefree.com tech@kcwirefree.com Website Sales Support Technical Support 0 KC Wirefree Page 5 of 5 Version November, 0