Hardware Features

128 Kbytes IRAM (Instruction RAM), 250 Kbytes DRAM (Data RAM), 96 Kbytes SRAM

(System RAM) with Auto Voice Buffer Scheme

Provide more than 3 seconds of dual voice buffer for seamless operation

Hardware assisted auto-buffers for MICs, DAC/TXs and RXs data to reduce system

overhead

Programmable LDO (0.9~1.32V) and PLL (1MHz ~ 150MHz), for MIPS and power efficiency requirements

Support various sampling rates: 8K/16K/24K/32K/44.1K/48KHz

Two PDM_DATA Input (support up to 4 Digital MICs) and two PDM_DATA Output pins

Two TX (microphone) and one RX (AEC reference) of I2S are supported

Microphone output can be I2S or PDM format

32K/512K/768K/1MHz PDM_CLKO with 16KHz sampling rate at power saving mode

SPI/I2C for program and acoustic model download at speed up to 20MHz/400KHz

• AVD function to provide ultra-low current for wakeup function

• (iM501+iM205) can be SIP-integrated to provide 1 Analog MIC (AMIC) and 3 Digital MICs (DMIC) System-On-Chip (SoC).

Software Features

VOS (Voice Operating System) for always-on ambience monitoring

Programmable speech detection and voice triggers

Beamforming, noise suppression and acoustic echo cancellation

Acoustic ambience analysis

Typical Application

Voice triggering applications for mobile devices

Voice processing and analysis for wearable devices

IoT voice control

Smart Microphone system

Automotive voice input processing

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