STA321MPLTR STMicroelectronics

STA321MP Scalable digital microphone processor Datasheet - production data Description The STA321MP is a PDM, high-performance, multichannel processor with ultra-low quiescent 74)3 current. It is designed for general-purpose digital PP PP microphone applications. The device is fully digital and is comprised of three main sections. The first section is the PDM input interface which Features can accept up to six serial digital inputs. The second section is a high-quality audio processor 8 digital processing channels each 24-bits allowing flexible channel mixing/muxing and 6 channels of PDM input provides up to 10 biquads for general sound 2 additional virtual channels equalization and voice enhancement with independent volume control. The last block is the >100 dB SNR and dynamic range IS output interface which streams out the Digital gain/attenuation 58 dB to -100 dB in processed digital audio. The output interface can 0.5 dB steps also be programmed for flexible channel Soft volume update mapping. The device offers some of the most commonly required audio enhancements such as Individual channel and master level control programmable voice tuning and equalization, Up to 10 independent 32-bit user- limiter/compressor for improved voice quality, programmable biquads (EQ) per channel multiband selection for customizable microphone Bass/treble tone control usage, and configurable wind-noise rejection. The embedded digital processor allows the Pre- and post-EQ full 8-channel input mix on all microphone processing to be offloaded from the 8 channels main CPU or SoC to the device. Dual independent limiters/compressors Dynamic range compression or anti-clipping Table 1. Device summary modes Order code Package Packaging Individual channel and master soft/hard mute STA321MPLTR TQFP64 Tape and reel 3 IS data outputs IS data output channel mapping function Independent channel volume and DSP bypass Channel mapping of any input to any processing channel Applications Tablets Gaming Audio conference sets Legacy microphone-equipped devices June 2016 DocID022647 Rev 6 1/47 This is information on a product in full production. www.st.comContents STA321MP Contents 1 Block diagram 5 2 Pin connections . 6 3 Electrical characteristics . 9 3.1 Absolute maximum ratings . 9 3.2 Thermal data . 9 3.3 Recommended operating conditions . 9 3.4 Electrical specifications 10 4 Pin description 11 2 5I C bus operation 12 5.1 Communication protocol 12 5.1.1 Data transition or change 12 5.1.2 Start condition 12 5.1.3 Stop condition 12 5.1.4 Data input . 12 5.2 Device addressing 12 5.3 Write operation . 13 5.3.1 Byte write 13 5.3.2 Multi-byte write 13 6 Application reference schematic 14 7 Registers . 15 7.1 Register summary 15 7.2 Register description . 18 7.2.1 Configuration register A (0x00) . 18 7.2.2 Configuration register C (0x02) - serial output formats . 20 7.2.3 Configuration register E (0x04) . 21 7.2.4 Configuration register F (0x05) . 21 7.2.5 Configuration register G (0x06) . 23 7.2.6 Configuration register H (0x07) . 24 2/47 DocID022647 Rev 6