WM8945ECSSLASHR datasheet(32/169 Pages) WOLFSON

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WM8945

Production Data

PD, May 2011, Rev 4.1

DSP CORE

DSP Core is at the centre of the ADC / DAC / Digital Audio Interface (I2S) blocks. It provides signal

routing, and also implements a number of configurable signal processing functions.

The signal processing functions are arranged in three blocks, as follows:



Signal Enhancement 1 (SE1) – Low-pass / High-pass filter, 5 notch filters, generic ‘Direct-

Form 1’ filter.



Signal Enhancement 2 (SE2) – ReTune™ processing, 5-band equalizer.



Signal Enhancement 3 (SE3) – Dynamic range control

The DSP Configuration modes and each of the Signal Enhancement blocks is described in the

following sections.

DSP CONFIGURATION MODES

The DSP Configuration Mode is determined using the SE_CONFIG register field; this configures the

signal paths between the Signal Enhancement blocks and the ADC / DAC / I2S interfaces. The

supported DSP modes are illustrated in Figure 13.

SE1 (LPF/HPF,

5-notch, DF1)

SE2 (HPF,

Re-Tune, 5-band EQ)

SE3 (Dynamic

Range Control)

DAC L

DIGITAL AUDIO

INTERFACE

ADC L

SE1 (LPF/HPF,

5-notch, DF1)

SE2 (HPF,

Re-Tune, 5-band EQ)

SE3 (Dynamic

Range Control)

DIGITAL AUDIO

INTERFACE

ADC L

DAC L

DSP Record Mode

DSP Playback Mode

Figure 13 DSP Configuration Modes

WM8945ECS/R 数据表(PDF) 32 Page - Wolfson Microelectronics plc

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