The Linkplay Wireless Smart Audio Module (A98M Series) is a third-generation smart audio module designed for integration into connected speakers, soundbars, and other audio devices. It supports both "voice built-in" and "work with voice" applications, making it a versatile solution for modern audio products.
Function Description:
The A98M module integrates a low-power Broadcom BCM43456 Wi-Fi/BT chip and an Amlogic A113X application processor, specifically designed for connected audio applications. Its core features include a powerful CPU subsystem, an advanced multi-format audio processing unit, and a secure running environment, along with essential peripherals, all optimized for low-power audio SoC.
The main system CPU is a quad-core ARM Cortex-A53, featuring L1 instruction/data cache for each core and a large unified L2 cache to enhance system performance. Each Cortex-A53 CPU can operate up to 1.2 GHz (with DVFS + hot plug). For low-power consumption, when the system is suspended, the main CPU can be powered off, and the Cortex-M3 in the always-on power domain can resume the system from multiple interrupt sources.
The audio processing engine (APE) is based on ARM® NEON™ general-purpose SIMD architecture, working seamlessly with the main CPU to accelerate multimedia processing algorithms and improve user experience. It supports decoding of all major high-resolution audio formats, including MP3, AAC, WMA, RM, FLAC, Ogg, etc., with the flexibility to support future audio encoding/decoding standards.
The module supports all standard audio input/output interfaces, such as multiple TDM, PCM, I2S, and SPDIF digital audio input/output interfaces, and 8-channel far-field PDM digital microphone (DMIC) inputs. Audio input includes a power detector for waking up from low activity states. Dedicated hardware-assisted synchronization blocks are integrated for multi-room audio applications. Additionally, audio input data can be restricted to trusted memory space to protect audio privacy.
Important Technical Specifications:
- Processor: Amlogic A113X application processor.
- Memory: 128MB DRAM (with 256MB, 512MB options) and 128MB NAND FLASH (with 256MB, 512MB options).
- Wireless Connectivity:
- IEEE 802.11 a/b/g/n/ac 1x1 dual-band Wi-Fi (2.4 GHz and 5 GHz).
- Bluetooth 5.0 with EDR and BLE.
- Wi-Fi (2.4GHz) Performance:
- Frequency Range: 2.400 GHz ~ 2.4835 GHz.
- Output Power (Tolerance ± 1.5 dB):
- 802.11b: 17 dB
- 802.11g/n: 16 dB
- 802.11n 20MHz MCS0-3: 17 dB
- Receive Sensitivity (Tolerance ± 2 dB):
- 802.11b 1Mbps: -96 dBm
- 802.11g 6Mbps: -91 dBm
- 802.11n 20MHz MCS0: -90 dBm
- Wi-Fi (5GHz) Performance:
- Frequency Range: 5.15~5.35GHz, 5.47~5.725GHz, 5.725~5.85GHz.
- Output Power (Tolerance ± 2 dB):
- 802.11a 6-9Mbps: 17 dB
- 802.11n 20MHz MCS0-3: 17 dB
- 802.11ac 20MHz MCS0-3: 17 dB
- Receive Sensitivity (Tolerance ± 2 dB):
- 802.11a 6Mbps: -92 dBm
- 802.11n 20MHz MCS0: -91 dBm
- 802.11ac 20MHz MCS0: -90 dBm
- Bluetooth Performance:
- Frequency Band: 2402 MHz ~ 2480 MHz.
- Output Power:
- BDR (GFSK): CL1: 6dBm, CL2: 2dBm
- EDR (π/4-DQPSK, 8DPSK): CL1: 4dBm, CL2: 2dBm
- LE: CL1: 5dBm, CL2: 2dBm
- Receive Sensitivity:
- GFSK (1Mbps): -86 dBm (Typical)
- π/4-DQPSK (2Mbps): -87 dBm (Typical)
- 8DPSK (3Mbps): -83 dBm (Typical)
- LE (1Mbps, 2Mbps): -90 dBm (Typical)
- Antenna Interface: External I-PEX I with 0~2 dBi peak gain for both Wi-Fi and Bluetooth.
- I/O Extension: USB, I2S, I2C, PDM, SPI, UART.
- Dimensions: 50mm x 43.33mm (NGFF golden finger 67PIN).
- Operating Ambient Temperature: 0°C ~ 40°C.
- Storage Temperature: -5°C ~ 45°C.
- Wi-Fi Working Distance: 2.4G 80 meters / 5G 150 meters.
- Power Supply: 3.5-5.5V.
Usage Features:
- Voice Assistant Integration: Pre-certified for multiple voice assistants such as Amazon Alexa Voice Services (AVS), Tencent Xiaowei, Naver Clova, Baidu DuerOS, Yandex Alice, and others.
- Music Streaming Services: Supports Apple Airplay 2, Spotify Connect, and numerous other music content services like Spotify, iHeartRadio, Amazon Music, Tidal, TuneIn, Deezer, and more. It is also compatible with DLNA streaming standards.
- High-Fidelity Audio: Supports Hi-Fi audio up to 192KHz, 24-bit with popular audio formats.
- Multi-room and Multi-channel Audio: Enables multi-room and multi-channel audio streaming with perfect synchronization, enhanced by hardware-assisted synchronization blocks.
- Audio Front-End Processing: Embedded software supports acoustic echo cancellation (AEC) and denoising for voice UI, along with sophisticated EQ processing for high-quality audio playback.
- Wireless Playback: Allows music playback wirelessly from iPhone, iPad, iPod touch, Android devices, or PC.
- Internet Connectivity: Transforms traditional speaker systems into Internet-enabled devices via wired or wireless connections, allowing playback of Internet audio content (music, podcasts, radio, movie audio).
- APP Support:
- iOS App: Compatible with iOS 6.1 and above (iOS 10 and above suggested).
- Android App: Compatible with Android 4.3.3 and above.
- Linkplay Device Cloud: Connects to the Linkplay device cloud, supporting firmware OTA (over-the-air) updates from the app and background, and logging app/device exceptions.
- Quick Customization: The Linkplay compile server allows customization of brand, strings, logos, and pictures for a branded app experience.
- Preset Functionality: Users can store music playlists on the G20 flash memory and play them via button/voice or timer, even without the app.
Maintenance Features:
- Firmware Updates: Supports firmware OTA updates for continuous improvement and new features.
- Regulatory Compliance: Linkplay assists in achieving certifications like Wi-Fi Alliance, BQB, Amazon Alexa, Tencent Xiaowei, Naver Clova, and Yandex Alice, ensuring market readiness.
- ESD Protection: Extreme caution is advised during handling to prevent electrostatic discharge (ESD) damage. Proper use of wrist and heel grounding straps is required, and unused material should be stored in antistatic packaging.
- FCC Information:
- RF Exposure: Requires a minimum 20cm separation distance between the antenna and users. MPE limits for RF exposure are 0.003mW/cm² for Bluetooth, 0.013mW/cm² for WLAN 2.4GHz, and 0.015mW/cm² for WLAN 5GHz.
- FCC Compliance: The device complies with Part 15 of FCC rules, subject to not causing harmful interference and accepting any interference received.
- OEM Integration: The antenna must be installed to maintain 20cm separation. The transmitter module cannot be co-located with other transmitters or antennas. OEM integrators are responsible for testing the end-product for additional compliance requirements.
- Labeling: The final product must be labeled with "Contains, FCC ID: 2ANOG-A98M."
- User Manual: OEM integrators must include all required regulatory information and warnings in the end-product user manual, without providing information on how to install or remove the RF module.
- RSE Evaluation: The module includes an RF (AP6256) shielding cover. OEM integrators must evaluate the RSE when installing the module to ensure regulatory compliance within their system.
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