Features
• Halo Core™ digital signal processor
— Dual MAC, 100 MHz audio signal processor
— 280 kB program memory, 768 kB data memory
— FFT, LMS, and FIR accelerators
• Event logger with time-stamp and interrupt functions
• Integrated multichannel 24-bit audio processor
— 104 dB signal-to-noise ratio (SNR) mic input (16 kHz)
• Programmable wideband, multimic audio processing
• Multichannel isochronous sample-rate conversion
• Up to four analog or digital microphone (DMIC) inputs
• Ultrasonic signal detection and demodulation
• Digital (PDM) output interface
• Two multichannel audio serial ports (ASP), supporting
data formats up to 192 kHz, 32 bits
• Flexible clocking configuration, incorporating a low-power
frequency-locked loop (FLL)
• Configurable functions on up to 16 general-purpose
input/output (GPIO) pins
• Integrated regulator and charge-pump circuits
— Switchable microphone supply/bias outputs
• WLCSP and QFN package variants, 0.4 mm pitch

Applications
• Smartphones and mobile accessories
• Always-on voice-triggered devices