IA8201 Audio Edge Processor

Knowles' AISonicâ„¢ audio edge processor IA8201 audiocentric OpenDSP enables accelerated machine learning inferencing

Image of Knowles' IA8201 Audio Edge ProcessorThe Knowles AISonic audio edge processor IA8201 is a high-performance, ultra-low-power audio-centric OpenDSP supporting up to 4 mics, multiple high-speed interfaces, and GPIOs in two package options (eWLB and QFN).

The IA8201 enables wake-on-voice processing for low latency voice UI, noise reduction, context awareness, and accelerated machine learning inferencing for edge processing of sensor inputs.

Use Case Examples

  • Low power voice wake: Listens for specific OEM keywords to wake the host processor. Large memory enables processing of multiple stages on-chip for accurate results.
  • Proximity detection: When combined with an ultrasonic capable speaker and microphone, detects the distance between the system and an object; can replace an IR-Prox sensor in bezel-less phones.
  • Hub: Determines location of voice source while tuning out a noisy environment and lowering music to detect voice commands. Simultaneously takes metadata input and overrides beamformer to focus on camera-tracked objects.
  • Security system: Activate with a voice command. Detect glass breakage/smoke alarm, log direction of noise source, trigger alarm, and send alerts through Wi-Fi connection.
  • Wireless earbuds: Delivers low power premium wake-on-voice performance, talk detection to eliminate false triggers, enhanced voice quality through advanced beamforming and noise reduction algorithms, and support for local commands, including answer/ignore calls.


  • Multi-Core: DeltaMax, optimized for compute; HemiDelta, optimized for low power
  • Audio interfaces: Up to 4x PDM digital microphones - 1 stereo inputs, 4 x mono inputs, and 1 stereo output, supporting clock rates up to 6.144 MHz; up to 3x PS/TDM ports supporting 8 channels each of 32-bit audio data using a 24.576 MHz input clock
  • Control interfaces: SPI, I2C, UART, available GPIOs
  • Memory: 1.44 MB RAM (1 MB available to users)
  • Clock: 175 MHz
  • Packaging options: eWLB 3.00 mm x 2.6 mm x 0.715 mm, 0.4 pitch, 42 ball; QFN 6.00 mm x 6.00 mm x 0.75 mm, 0.5 pitch, 40 lead
  • System requirements: IA8201BC 1.8 VDD, IA8201CQ 1.8 VDD and 3.3 VDD, -20°C to +85°C

IA8201 Audio Edge Processor

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Published: 2021-09-22