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CS48LV12/13

Ultralow Power HD Voice Processors, Featuring SoundClear® Technology

Cirrus Logic 

1 Documentation

1 Documentation

This document describes the CS48LV12 and CS48LV13 HD voice processors. When evaluating or designing a system

around the CS48LV12/13 processors, use this document in conjunction with the documents listed in Table 1-1.

Table 1-1. CS48LV12/13 Related Documentation

Document Name

CS48LV12/13 Data Sheet

RAPID2™ User’s Guide

DSPComposer™ User’s Manual for

CS48LV12/13

CS48L10 Hardware User’s Manual

CRD48L10 4in4out Board Manual

Micro-condensers User’s Guide

AN344

AN344CBE

AN344CBV

AN344CVT

AN344EQ

AN344TC

Description

This document

Instructional manual for using the RAPID2 tool for voice processing diagnostics and tuning

Manual for using the CS48LV12/13 version of DSP composer™ tool for post-processing

configuration and tuning

Includes detailed system design information including typical connection diagrams and boot

procedures applicable for CS48L10/L11/LV12/LV13

Manual for development and evaluation board for CS48L10/L11/LV12/LV13

Instructional manual for using Micro-condenser for creating microcode and flash image for

embedded systems applications

Firmware User’s Manual for CS48L10/L11/LV12/LV13

Applications note for Cirrus Bass Enhancement (CBE) Module

Applications note for Cirrus Bass Virtualization (CBV) Module

Applications note for Cirrus Virtualization Technology (CVT)

Applications note for Cirrus Equalization (EQ) Module

Applications note for Tone Control Post-processor Module

The primary scope of this document is to provide the hardware specifications of the CS48LV12/13 family of devices. These

include hardware functionality, characteristic data, pinout, and packaging information. The intended audience includes

system PCB designers, MCU programmers, and quality-control engineers.

2 Overview

The CS48LV12 and CS48LV13 products are based on Cirrus Logic 32 bit fixed point DSP's which feature the ultralow

power, tiny foot print, high performance and low cost that is required by today's mobile voice communication products. For

ease of implementation and high computational efficiency, each product includes an embedded software package highly

optimized for the DSP. Designed into each product is the ability to support multiple modes and configurations that match

an array of product use models for smartphones, tablets, and mobile computing devices as well as a variety of consumer

and automotive products with hands-free communication features.

The CS48LV12 incorporates Cirrus Logic SoundClear technology to perform all voice processing functions typically

required in handset and hands-free products including noise reduction, echo cancellation, and a comprehensive set of

voice enhancement capabilities. SoundClear technology uses proprietary algorithms to decipher spatial and spectral

characteristics of both the Rx (far-end) and Tx (near-end) digital voice streams and categorize various types of noise and

speech, removing noise and competing talkers while automatically adjusting for SPL changes, changes in product position

and orientation, and ongoing environmental changes. Other SoundClear modules monitor talk status (single Tx, single Rx,

silence, double-talk), cancel echo, suppress residual echo, and inject comfort noise if required to achieve natural,

consistent, full-duplex, echo-free conversation, in both hand-set and hands-free modes.

The CS48LV12 also includes integrated media processing capabilities to enhance audio playback over internal speakers

or attached devices such as speakers and headphones.

The CS48LV13 includes all the voice and media processing capabilities as well as ASR pre-processing (ASR Enhance)

to remove noise that limits ASR accuracy and reliability. It also includes a specialized Voice Activity Detector (VAD) that

enables the CS48LV13 to remain in a very low power "always-on" state until the VAD detects human speech in the

proximity of a microphone. This feature is typically used in conjunction with a local ASR solution such as the CS48LV13's

optional Sensory TrulyHandsfree voice control.

The CS48LV13 also supports several optional features requiring third party licenses:

• Sensory, Inc. TrulyHandsfree voice control

• Dolby, Inc. media playback enhancement algorithms

• DTS, Inc. media playback enhancement algorithms

5

DS1057F1

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