PEB2466-HV1.2 Ver la hoja de datos (PDF) - Infineon Technologies

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PEB2466-HV1.2

Four Channel Codec Filter with PCM- and µ-Controller Interface SICOFI®4-µC

Infineon Technologies 

PEB 2466

Functional Description

Analog OUT

D

A

Analog IN

A

D

Analog OUT

D

A

Analog IN

A

D

Command

Indication

Signaling

Command

Indication

Signaling

Voice Data

PCM Interface

DSP

µC Interface

Control Data

D

A

Analog OUT

A

D

Analog IN

D

A

Analog OUT

A

D

Analog IN

Signaling

Command

Indication

Signaling

Command

Indication

ITB07256

Figure 3

SICOFI®-4-µC Block Diagram

The SICOFI-4-µC bridges the gap between analog and digital voice signal transmission

in modern telecommunication systems. High performance oversampling

Analog-to-Digital Converters (ADC) and Digital-to-Analog Converters (DAC) provide the

conversion accuracy required. Analog antialiasing prefilters (PREFI) and smoothing

postfilters (POFI) are included. The connection between the ADC and the DAC (with high

sampling rate) and the DSP, is done by specific Hardware Filters, for filtering like

interpolation and decimation. The dedicated Digital Signal Processor (DSP) handles all

the algorithms necessary e.g. for PCM bandpass filtering, sample rate conversion and

PCM companding. The PCM-interface handles digital voice transmission, a serial

µC-interface handles SICOFI-4-µC feature control and transparent access to the

SICOFI-4-µC command and indication pins. To program the filters, precalculated sets of

coefficients are downloaded from the system to the on-chip Coefficient-RAM (CRAM).

Semiconductor Group

17

02.97

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