Direct Attached Digital Microphone (PDM) Interface

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Revision History
Introduction
PCH Controller Device IDs
- Revision IDs
- Device IDs
Memory Mapping
- Functional Description
- Memory Map
Audio Voice and Speech
Ballout Definition
Connectivity Integrated (CNVi)
Controller Link
Direct Enhanced Serial Peripheral Interface (Direct eSPI)
Direct Media Interface (DMI)
Enhanced Serial Peripheral Interface (eSPI)
Gigabit Ethernet Controller
Host System Management Bus (SMBus) Controller
Integrated Sensor Hub (ISH)
Intel® Serial I/O Improved Inter-Integrated Circuit (I3C) Controllers
Intel® Serial I/O Inter-Integrated Circuit (I2C) Controllers
Intel® Serial I/O Universal Asynchronous Receiver/Transmitter (UART) Controllers
Intel® Serial IO Generic SPI (GSPI) Controllers
PCI Express* (PCIe*)
Real Time Clock (RTC)
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- I/O Signal Planes and States
Serial ATA (SATA)
Serial Peripheral Interface (SPI)
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System Management Interface and SMLink
Touch Host Controller (THC)
Universal Serial Bus (USB)
General Purpose Input and Output
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- Signal Description
GPIO Serial Expander
Private Configuration Space Port ID
Security Firmware Engines
- Intel® Converged Security and Management Engine (Intel® CSME)
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System Management
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Testability and Monitoring
- Signal Description
- I/O Signal Planes and States
Miscellaneous Signals
Processor Sideband Signals
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- I/O Signal Planes and States
Power Delivery
- Power and Ground Signals
Power Management
Thermal Sensor
Electrical Characteristics

The direct attached digital microphone interface is a feature offering connections to PDM based digital microphone modules without the need of audio codecs. This provides the lowest possible platform power with the decimation functionality integrated into the audio host controller. Features for the digital microphone interface are listed as follows:

Up to 2 Digital Mic Ports with to 2 Digital Mic Modules per Digital Mic Port
Ability to combine multiple Digital Mic Ports to for mic arrays that are synchronized on sampling rate basis
2 PCM Audio Streams with independent PCM sampling rates per Digital Mic Port
Ability to map each Digital Mic Port stereo PCM streams output to a sub-set of a multi-channel PCM stream data transferred to an Audio Link Hub
- Support dynamic scaling up/down of microphone channels array after the stream has started
Support child clock input mode of operation

USB Audio Offload Support

Intel® High Definition Audio Interface Capabilities USB Audio Offload Support