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NOTE: the module is limited to OEM installation only, separate approval is required for all other operating configurations, including portable configurations and different antenna configurations. When the module is used in host, it must consider FCC/IC required,refer to FCC Radiation ExposureStatement and FCC/IC Warning. ... Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 Description Specification release Add electrical specifications Update VDDRTC current parameters HISTORY Version 1.0 1.1 1.2 Date 01/17/2017 06/15/2017 07/20/2017 Document No.: WMB20170117 Page 2 of 21 Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 INDEX 1. 2. 1.1. Overview ..................................................................................................................................................... 4 Parameter ................................................................................................................................................. 4 Hardware description ................................................................................................................................ 5 2.1. Description of hardware interface ............................................................................................................ 5 2.2. Mechanical Dimension ............................................................................................................................ 8 External Antenna ................................................................................................................................... 11 2.3. 2.4. Typical Application ................................................................................................................................ 12 2.5 Power on Sequence ...................................................................................................................................... 15 2.6 USB Host Port ....................................................................................................................................... 17 Electrical Specifications .......................................................................................................................... 18 3.1. Absolute Maximum Ratings .................................................................................................................. 18 3.2. Recommended operating conditions ...................................................................................................... 18 Power consumption ............................................................................................................................... 19 3.3 3. Software Introduction ......................................................................................................................................... 19 3.1. Feature list .................................................................................................................................................. 19 3.2. App support ................................................................................................................................................. 20 3.3. Certifications .............................................................................................................................................. 20 4. Module picture and package ............................................................................................................................... 20 3. Document No.: WMB20170117 Page 3 of 21 Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 1. Overview Linkplay Wi-Fi Audio module - A76, is our third generation smart audio modules developed to be used in the connected speaker, sound bar and other connected audio devices. It integrates the low power Broadcom BCM43438 Wi-Fi/BT chip and Ingenic X1000E application processor. The CPU is running at 1GHz with hardware engine dedicated for floating point processing and the SIMD instruction acceleration. It supports IEEE 802.11 b/g/n/ac 2.4GHz. It also supports BT4.0 with EDR and BLE. A76 module also provides USB, I2S, I2C, PWM, AUX in, SD/MMC etc. Interfaces. The firmware is fully compatible with Apple AirPlay and digital living network alliance (DLNA) streaming standards. It supports Hi-Fi audio up to 192Khz, 24-bit with most popular audio formats. It supports multi-room and multi-channel audio streaming with perfect synchronization. With this module, you can play the music on your speaker wirelessly from iPhone, iPad , iPod touch, Android devices or PC. More important, it enables the traditional speaker system to become the Internet enabled device through the wired or wireless connection provided by the module. Thus, you could freely playback any Internet audio contents such as music, podcast, radio or either the accompany audio in the movie directly from the Internet. Feature Support IEEE 802.11 b/g/n Wi-Fi 2.4G Support BT4.0+EDR and BLE Application Connected speaker, sound bar Connected audio devices 1.1. Parameter Wi-Fi Items Certification Standard Frequency 2.4G Transmit Performance FCC/CE IEEE 802.11 b/g/n 2.4GHz 2.400GHz - 2.497GHz 802.11b /CCK : 16 dBm 1.5 dB
@ EVM -9dB 802.11g /64-QAM(R=3/4) : 15 dBm 1.5 dB
@ EVM -25dB 802.11n /64-QAM(R=5/6) : 14 dBm 1.5 dB
@ EVM -27dB Document No.: WMB20170117 Page 4 of 21 Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 Modulation Receive sensitivity 2.4G
(typical) Maximum receiver power Antenna Version Frequency Number of Channel Modulation Transmit (Class1.5) Receive sensitivity Maximum receiver power Antenna Work voltage Work current Standby current Work temperature Storage temperature Wi-Fi work distance IO Extension Dimension 802.11b : DQPSK, DBPSK, CCK 802.11g/n : 64-QAM,16-QAM, QPSK, BPSK 802.11b: 11Mbps PER=8% @ -87 dBm, 802.11g: 54Mbps PER=10% @ -74 dBm 802.11n(20MHz) : MCS=7 PER=10% @ -71 dBm, 802.11b : -10dBm 802.11g/n : -20dBm External: I-PEX, antenna gain 0~2 dBi, shared with BT Bluetooth V4.0 2402 MHz ~ 2480 MHz 79 FHSS, GFSK, DPSK, DQPSK 8 dBm
@ BER=0.1% for GFSK (1Mbps) -86dBm
@ BER=0.01% for /4-DQPSK (2Mbps) -86dBm
@ BER=0.01% for 8DPSK (3Mbps) -80dBm GFSK (1Mbps) :-20dBm
/4-DQPSK (2Mbps) :-20dBm 8DPSK (3Mbps) :-20dBm External: I-PEX, antenna gain 0~2 dBi, shared with BT 5V TBD TBD
-5~40
-40~135 TBD USBSD/MMC 41.7mm x 32.2mm 56-PIN DIP Table1-1 Linkplay A76 module parameters BT Hardware 2. Hardware description 2.1. Description of hardware interface A76 provides the option to connect with customer board through its 56-pins DIP. The detail is as follows. Document No.: WMB20170117 Page 5 of 21 Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 Pin description:
Pin No. 125 2930 GND Pin Name 54 34 6 8 7 9 10 11 12 13 5VIN VDDRTC
+3.3V GPC23 GPB22 MSC0_CMD MSC0_CLK MSC0_D0 MSC0_D1 Figure 2-1 A76 interface pins Type Function0 Function1 Supply Digital ground I I/O Power supply input > 500mA RTC power supply input < 40uA Power I Power I Power O Output for I/O power < 100mA SDIO0 card detect, external pull-up required General purpose input output, external pull-up required SDIO0 pull-up required SDIO0 clock SDIO0 data 0, external pull-up required SDIO0 data 1, external pull-up command, external I/O I/O O O Document No.: WMB20170117 Page 6 of 21 Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 31 32 33 34 35 36 37 38 39 40 MSC0_D2 MSC0_D3 GPB14 GPB12 GPB15 GPB13 GPB11 GPB10 GPB9 GPB8 GPB7 required SDIO0 data 2, external pull-up required SDIO0 data 3, external pull-up required General purpose input output, external pull-up required General purpose input output, external pull-up required General purpose input output, external pull-up required General purpose input output, external pull-up required General purpose input output, external pull-up required General purpose input output, external pull-up required General purpose input output, external pull-up required General purpose input output, external pull-up required General purpose input output, external pull-up required I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O PWM3 I/O Pulse width modulation GPB6(General purpose input output, external pull-up required) PPRST_N WKUP_N OTG_ID GPC22 GPC21 I2C0_SDA I2C0_SCL PWM2 PWM1 PWM0 PWM4 GPD5 GPD4 I I I I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O CPU reset, internal pull-up RC delay Wake-up, internal pull-up OTG ID signalinternal pull-up General purpose input output, external pull-up required General purpose input output, external pull-up required I2C0 data, internal pull-up I2C0 clock, internal pull-up Pulse width modulation Pulse width modulation Pulse width modulation Pulse width modulation General purpose input output, external pull-up required General purpose input output, Document No.: WMB20170117 Page 7 of 21 Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 41 42 43 44 45 46 47 48 49 50 51 52 53 55 56 GPD1 GPD3 I2S_MCLK I2S_BCLK I2S_DI I2S_LRCLK I2S_DO GPB5 GPD2 GPB21 GPD0 PWRON GPB25 USB_DP USB_DM external pull-up required General purpose input output, external pull-up required General purpose input output, external pull-up required I2S master clock I2S bit clock I2S data input I2S L/R clock I2S data output General purpose input output, external pull-up required General purpose input output, external pull-up required General purpose input output, external pull-up required General purpose input output, external pull-up required Power on output General purpose input output, external pull-up required USB data plus USB data minus I/O I/O I/O I/O I I/O O I/O I/O I/O I/O O I/O I/O I/O I2C2_SDA UART1_TXD UART1_RXD I2C2_SCL Internal development only Table 2-1 Linkplay A76 module pin description IInput Notes:
1. 2. OOutput 3. PPower 4. PUInternal Pull Up 5. PDInternal Pull Down 2.2. Mechanical Dimension Linkplay A76 module has the dimension of 41.7mm x 32.2mm. The detailed layout will be given shortly below. Unit: mm Document No.: WMB20170117 Page 8 of 21 Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 TOP Components High Limit Document No.: WMB20170117 Page 9 of 21 Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 BOTTOM Components High Limit Document No.: WMB20170117 Page 10 of 21 Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 Figure 2-2: Linkplay A76 physical dimension 2.3. External Antenna A76 uses the external antenna for the best Wi-Fi performance. To use external antenna, please choose the antenna type that meets the requirement of IEEE 802 b/g/n Wi-Fi standard running at 2.4GHz frequency. The detailed parameters are shown in the table below. Item Frequency range Impedance VSWR Reflection loss Connector Parameter 2.4~2.5GHz 50 Ohm 2 (Max)
-10dB (Max) I-PEX or populate directly Table 2-5 External antenna parameters for A76 Document No.: WMB20170117 Page 11 of 21 Number Version WMB20170117 1.2 Doc Title Linkplay WiFiAudio-A76 Specification 2.4. Typical Application WiFiAudio-A76s typical reference design:
CODEC Far-Field Document No.: WMB20170117 Page 12 of 21 Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 Page 13 of 21 Micro SD Card Power Document No.: WMB20170117 Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 Button and LED Document No.: WMB20170117 Page 14 of 21 Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 2.5 Power on Sequence A76 module has two power domains: VDDRTC and 5VIN. The following is recommended power on sequence. There are three I/O pins in RTC power domain:
1. PPRST_N: Power on reset and hardware reset signal input 2. WKUP_N: Power on signal input 3. PWRON: Power on signal output to turn on DCDC/LDO/Power switches Note: There is an R-C delay circuit on A76 for power on reset sequence, so you may consider PPRSET_N only as HW reset. The following are two power on sequences for typical applications Document No.: WMB20170117 Page 15 of 21 Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 Power on Sequence #1:
Step 1: Input 1.8V~3.3V power from DC IN or Battery to VDDRTC pin, then RTC power domain turns active Step 2: Input a pulse (low level active, more than 160ms) to WKUP_N pin Step 3: Once A76 gets this pulse , it will continuously output a high level signal from PWNON pin to turn on every DCDC/LDO Step 4: DCDC on, 5V power supply to A76 5VIN pin Step 5:A76 generate every power voltage needed inside the module Step 6:A76 generate power-on reset inside the module, system boot up Document No.: WMB20170117 Page 16 of 21 Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 Power on sequence #2: (Apply to the user case that there is external MCU in the system) Step 1: MCU turn on the DC/DC and 5V power supply to A76 through 5VIN Step 2:A76 generate every power voltage needed inside the module. Step3:A76 generate power-on reset inside the module and system boot up. Note 1: Once 5VIN power is stable, current drain from VDDRTC pin is no longer exist, A76 will generate a voltage supply to VDDRTC power domain itself, on purpose of reducing power consumption of RTC battery. Note 2: During the process of system power-on, every signal connected to A76(I2S,I2C,GPIO,UART etc..) should configured as GPIO and set to High-Z or input mode. Please strictly avoid high level signals on these traces, otherwise it may cause wrong power sequence and system boot up failed. 2.6 USB Host Port Please follow the design rule below to populate the USB host interface:
Item Signal Group Topology Reference Plane Characteristic Trace Impedance (Zo) Parameter USB Differential Pair Point-to-Point Ground Referenced 90 10%
Document No.: WMB20170117 Page 17 of 21 Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 Trace Width Serpentine Spacing(center to center) Minimum Isolation Spacing to Clock Signals Minimum Isolation Spacing to Low-Speed Signals Minimum Isolation Spacing to other USB Pair Total Length (with package length) Maximum Recommended Via Count DM to DP Length Matching(with package length) Match total length to within 10 mils 4 mils 8.5 mils 50 mils 20 mils 20 mils
< 8000 mils 2 (per side) Table 2-2 A76 USB design rule 3. Electrical Specifications 3.1. Absolute Maximum Ratings The absolute maximum ratings for the processors are listed in Table 3-1. Do not exceed these parameters or the part may be damaged permanently. Operation at absolute maximum ratings is not guaranteed. Table 3-1 Absolute Maximum Ratings Parameter Storage Temperature Operation Temperature 5VIN power supplies voltage Input voltage to VDDRTC supplied non-supply pins Maximum ESD stress voltage, Human Body Model; Any pin to any supply pin, either polarity, or Any pin to all non-supply pins together, either polarity. Three stresses maximum. Min
-40
-5
-0.5
-0.5 Max 135 40 5.3 3.6 2000 Unit V V V 3.2. Recommended operating conditions The recommended operating conditions are listed in Table 3-2. Table 3-2 Recommended operating conditions for power supplies Description Power supply input RTC power supply input Min 3.7 3.0 Typical 5.0 3.3 Max 5.25 3.6 Unit V V Symbol 5VIN VDDRTC Document No.: WMB20170117 Page 18 of 21 Doc Title Linkplay WiFiAudio-A76 Specification 3.3 Power consumption Number Version WMB20170117 1.2 The consumption of various operating conditions are listed in Table 3-3. Table 3-3 Operating conditions for power consumption Function on Connected w/o data transmission Data transmission Power 58-61 58-60 57-61 99-111
(Soft AP) 58-64 57-60 58-63 57-60 63-109 60 3 58-62 66-70 67-70 65-115 Unit mA mA mA mA mA mA mA Mode BLE on only A2DP on only BLE+A2DP ON BLE+A2DP off Wi-Fi ON Wi-Fi off Hibernation 3. Software Introduction 3.1. Feature list Easy Setupto setup your network, with the help of one button of your device, you can connect the device to your home router quickly. Music stream protocol Support Spotify Connect, Airplay, DLNA and QPlay protocol Amazon Alexa Music content Support iHeartRadio, Napster/Rhapsody, Tidal, Deezer, vTune, Qobuz, Audible, Radio.de, NPRXimalaya Qingting FM, QQ FM, Douban FM inside, with the help of App, you can search, stream, playback and preset the musics of the above music services. Multiroom Support multiroom. Support Airplay, Spotify, Bluetooth, Aux-in multiroom playback. Music format HTTP/HTTPS/RTSP/MMS/TS protocol HLS/ASX/M3U playlist format MP3/AAC/FLAC/ALAC/WMA/APE/OGG codec BT Support 4.2A2DP, AVRCP, HFP, HID profiles Support BLE Document No.: WMB20170117 Page 19 of 21 Doc Title Linkplay WiFiAudio-A76 Specification Number Version WMB20170117 1.2 Support EDR Preset With the help of App, you can store the music account token and playlist in the A76. Then the end user can play the playlist by the button/voice or timer even without the App. 3.2. App support iOS App
>= iOS6.1suggest iOS10 and above Android App
>= Android 4.3.3 Quick custimzation With the help of the Linkplay compile server, you can change the brand and some strings, change the logo and some pictures to get a customization App. 3.3. Certifications Linkplay can help you to finish follow certifications::
Wi-Fi Logo BQB Amazon Alexa MFI DLNA QPlay Spotify Connect 4. Module picture and package 1A76 module picture (insert later) Notes:
Linkplay: Linkplay logo A76: Module No. V01: MP version of A76 module 2Delivery Document No.: WMB20170117 Page 20 of 21 Number Version WMB20170117 1.2 Doc Title Linkplay WiFiAudio-A76 Specification Notes One tray = 30pcs One box = 15 trays On box in total: 15*30pcs = 450pcs Document No.: WMB20170117 Page 21 of 21 FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. End users must follow the specific operating instructions for satisfying RF exposure compliance. Note 1: This module certified that complies with RF exposure requirement under mobile or fixed condition, this module is to be installed only in mobile or fixed applications. A mobile device is defined as a transmitting device designed to be used in other than fixed locations and to generally be used in such a way that a separation distance of at least 20 centimeters is normally maintained between the transmitter's radiating structure(s) and the body of the user or nearby persons. Transmitting devices designed to be used by consumers or workers that can be easily re-located, such as wireless devices associated with a personal computer, are considered to be mobile devices if they meet the 20 centimeter separation requirement. A fixed device is defined as a device is physically secured at one location and is not able to be easily moved to another location. Note 2: Any modifications made to the module will void the Grant of Certification, this module is limited to OEM installation only and must not be sold to end-users, end-user has no manual instructions to remove or install the device, only software or operating procedure shall be placed in the end-user operating manual of final products. Note 3: Additional testing and certification may be necessary when multiple modules are used. Note 4: The module may be operated only with the antenna with which it is authorized. Any antenna that is of the same type and of equal or less directional gain as an antenna that is authorized with the intentional radiator may be marketed with, and used with, that intentional radiator. Note 5: To ensure compliance with all non-transmitter functions the host manufacturer is responsible for ensuring compliance with the module(s) installed and fully operational. For example, if a host was previously authorized as an unintentional radiator under the Declaration of Conformity procedure without a transmitter certified module and a module is added, the host manufacturer is responsible for ensuring that the after the module is installed and operational the host continues to be compliant with the Part 15B unintentional radiator requirements. Since this may depend on the details of how the module is integrated with the host, Linkplay Technology Inc.. shall provide guidance to the host manufacturer for compliance with the Part 15B requirements. Note 6: FCC ID label on the final system must be labeled with Contains FCC ID: 2ANOG-A76D or Contains transmitter module FCC ID: 2ANOG-A76D. 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. NOTE: Any changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. IC WARNING This device complies with Industry Canadas licence-exempt RSSs. Operation is subject to the following two conditions:
(1) This device may not cause interference; and
(2) This device must accept any interference, including interference that may cause undesired operation of the device. Le prsent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorise aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible d'en compromettre le fonctionnement. IC Radiation Exposure Statement:
This module and its antenna(s) must not be co-located with any other transmitters except in accordance with IC multi-transmitter product procedures. Referring to the multi-transmitter policy, multiple-transmitter(s) and module(s) can be operated simultaneously without reassessment permissive change. Cet appareil et son antenne (s) ne doit pas tre co-localiss ou fonctionnement en association avec une autre antenne ou transmetteur. This equipment complies with IC RSS-102 radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body. Cet quipement est conforme aux limites d'exposition aux rayonnements IC tablies pour un environnement non contrl. Cet quipement doit tre install et utilis avec un minimum de 20cm de distance entre la source de rayonnement et votre corps. This module is limited to OEM installation only and must not be sold to end-users, end-user has no manual instructions to remove or install the device, only software or operating procedure shall be placed in the end-user operating manual of final products. Additional testing and certification may be necessary when multiple modules are used. Any changes or modifications not expressly approved by the manufacturer could void the user's authority to operate this equipment. The final end product must be labeled in a visible area with the following " Contains IC:
23153-A76F ".