STA321MPL Просмотр технического описания (PDF) - STMicroelectronics

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STA321MPL

Scalable digital microphone processor

STMicroelectronics 

STA321MP

Scalable digital microphone processor

Features

■ 8 digital processing channels each 24-bit

– 6 channels of PDM input

– 2 additional virtual channels

■ >100 dB SNR and dynamic range

■ Digital gain/attenuation +58 dB to -100 dB in

0.5 dB steps

■ Soft volume update

■ Individual channel and master level control

■ Up to 10 independent 32-bit user-

programmable biquads (EQ) per channel

■ Bass/treble tone control

■ Pre- and post-EQ full 8-channel input mix on all

8 channels

■ Dual independent limiters/compressors

■ Dynamic range compression or anti-clipping

modes

■ Individual channel and master soft/hard mute

■ 3 I2S data outputs

■ I2S data output channel mapping function

■ Independent channel volume and DSP bypass

■ Channel mapping of any input to any

processing channel

Applications

■ Tablets

■ Smartphones

■ Gaming

■ Audio conference sets

■ Legacy microphone-equipped devices

TQFP - 64

10 mm x 10 mm

VFQFPN - 56

8 mm x 8 mm

Description

The STA321MP is a PDM high-performance

multichannel processor with ultra-low quiescent

current designed for general-purpose digital

microphone applications. The device is fully digital

and is comprised of three main sections. The first

section is the PDM input interface which can

accept up to six serial digital inputs. The second

section is a high-quality audio processor allowing

flexible channel mixing/muxing and provides up to

10 biquads for general sound equalization and

voice enhancement with independent volume

control. The last block is the I2S output interface

which streams out the processed digital audio.

The output interface can also be programmed for

flexible channel mapping. The device offers some

of the most commonly required audio

enhancements such as programmable voice

tuning and equalization, limiter/compressor for

improved voice quality, multiband selection for

customizable microphone usage and configurable

wind-noise rejection. The embedded digital

processor allows offloading the microphone

processing from the main CPU or SoC, moving it

to the device.

Table 1. Device summary

Order code

Package

Packing

STA321MPL TQFP64

Tube

STA321MP

VFQFPN56

Tube

February 2012

Doc ID 022647 Rev 1

1/50

www.st.com

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