PEB2466 SIEMENS [Siemens Semiconductor Group], PEB2466 Datasheet - Page 17

• Manufacturer Part Number: PEB2466
• Description: Four Channel Codec Filter with PCM- and m-Controller Interface SICOFI4-mC
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Figure 3
SICOFI
The SICOFI-4- C bridges the gap between analog and digital voice signal transmission
in
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
SICOFI-4- C 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
C-interface handles SICOFI-4- C feature control and transparent access to the
Analog OUT
Analog IN
Analog OUT
Analog IN
Command
Indication
Command
Indication
modern
®
-4- C Block Diagram
telecommunication
D
A
D
A
A
D
A
D
Signaling
Signaling
PCM Interface
systems.
Control Data
Voice Data
C Interface
DSP
17
High
performance
Signaling
Signaling
Functional Description
D
A
D
A
A
D
A
D
Analog OUT
Analog IN
Analog OUT
Analog IN
Command
Indication
Command
Indication
ITB07256
oversampling
PEB 2466
02.97