The ACP-DMIC node demonstrates robust performance and a strong security baseline suitable for production deployment in zero-trust networks. However, the following actions are required prior to broad rollout:
Smart speakers and automotive hands-free kits use arrays of 2, 4, or even 8 digital MEMS microphones. The DMIC node handles the high data rate of PDM streams (typically 1–3 MHz bit clock) and decimates them to standard audio rates (16 kHz, 48 kHz). acp dmic node
| Feature | ACP DMIC Node | I2S + External Codec | McASP (Multi-channel Audio Serial Port) | | --- | --- | --- | --- | | | Digital (PDM) | Analog (via Codec ADC) | Digital (I2S/TDM) | | Component Count | None external | Requires codec, analog routing | None if using digital mic with I2S | | Multi-mic support | Up to 8 channels (4 data lines) | Depends on codec | Up to 16+ channels | | Processing offload | ACP does decimation | Codec does decimation | CPU or external DSP | | Power | Very low (PDM + decimation) | Medium | Low to Medium | The ACP-DMIC node demonstrates robust performance and a
As voice interfaces converge with AI/ML at the edge, expect the DMIC node to integrate tightly with a neural processing unit (NPU) for on-chip keyword spotting. | Feature | ACP DMIC Node | I2S
Containerized (Kubernetes) or bare-metal appliance.
It is a physical pin; it is a logical data path inside the SoC’s interconnect.