STA321MPL1TR STMicroelectronics

STA321MPL1 Scalable digital microphone processor Datasheet - production data Description The STA321MPL1 is a PDM, high-performance, multichannel processor with ultra-low quiescent 74)3 PP PP current. It is designed for general-purpose digital microphone applications. The device is fully digital and is comprised of three main sections. Features The first section is the PDM input interface which can accept up to six serial digital inputs. The 8 digital processing channels each 24-bits second section is a high-quality audio processor 6 channels of PDM input allowing flexible channel mixing/muxing and provides up to 10 biquads for general sound 2 additional virtual channels equalization and voice enhancement with >100 dB SNR and dynamic range independent volume control. The last block is the Digital gain/attenuation 58 dB to -100 dB in IS output interface which streams out the 0.5 dB steps processed digital audio. The output interface can also be programmed for flexible channel Soft volume update mapping. The device offers some of the most Individual channel and master level control commonly required audio enhancements such as Up to 10 independent 32-bit user- programmable voice tuning and equalization, programmable biquads (EQ) per channel limiter/compressor for improved voice quality, multiband selection for customizable microphone Bass/treble tone control usage, and configurable wind-noise rejection. The Pre- and post-EQ full 8-channel input mix on all embedded digital processor allows the 8 channels microphone processing to be offloaded from the Dual independent limiters/compressors main CPU or SoC to the device. Dynamic range compression or anti-clipping The STA321MPL1 has six digital microphone modes inputs, providing connections for up to three dual- Individual channel and master soft/hard mute membrane microphones. 3 IS data outputs Table 1. Device summary IS data output channel mapping function Order code Package Packaging Independent channel volume and DSP bypass STA321MPL1TR TQFP64 Tape and reel Channel mapping of any input to any processing channel Applications Tablets Gaming Audio conference sets Legacy microphone-equipped devices June 2016 DocID029389 Rev 1 1/80 This is information on a product in full production. www.st.comContents STA321MPL1 Contents 1 Device overview 7 1.1 Block diagram . 7 1.2 Pin description 8 2 Electrical characteristics 11 2.1 Absolute maximum ratings .11 2.2 Thermal data .11 2.3 Recommended operating conditions .11 2.4 Electrical specifications 12 3 Microphone interface . 13 3.1 PDM clock generator (for microphones) 13 3.2 PDM resampling interface 14 3.3 PDM recombination (dual-membrane microphone support) 15 3.4 Low-pass filter . 15 3.5 Sensitivity adjustment 16 3.6 Normal channel attenuation . 16 3.7 Thresholds 16 2 4I C bus operation 17 4.1 Communication protocol 17 4.1.1 Data transition or change 17 4.1.2 Start condition 17 4.1.3 Stop condition 17 4.1.4 Data input . 17 4.2 Device addressing 17 4.3 Write operation . 18 4.3.1 Byte write 18 4.3.2 Multi-byte write 18 4.4 Read operation . 19 4.4.1 Current address byte read . 19 4.4.2 Current address multi-byte read 19 4.4.3 Random address byte read 19 2/80 DocID029389 Rev 1