PSB2163T-V31TR Infineon Technologies, PSB2163T-V31TR Datasheet - Page 139

• Manufacturer Part Number: PSB2163T-V31TR
• Description: IC AUDIO RINGING CODEC 28-PDSO
• Manufacturer: Infineon Technologies
• Series: ARCOFI®r

Specifications of PSB2163T-V31TR

• Function: CODEC Filter
• Interface: IOM-2, PCI, Serial
• Number Of Circuits: 1
• Voltage - Supply: 5V
• Current - Supply: 900µA
• Power (watts): 1mW
• Operating Temperature: -25°C ~ 80°C
• Mounting Type: Surface Mount
• Package / Case: DSO-28
• Includes: Activation and Deactivation, B-Channel and D-Channel HDLC Controllers, D-Channel Priority Handler, Monitor Channel Handler
• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification
• Other names: PSB2163T-V31INTR; PSB2163T-V31TR

Semiconductor Group
The main features of the speakerphone signal processing are:
• Two separate attenuation stages, one for the transmit and one for the receive path,
• Two point speech detection; one speech detector for each path, with separate time
• Control of the acoustic echo performed by a fully programmable speech comparator;
• Control of the far-end echo performed by a fully programmable comparator for the line
• Background noise monitoring to eliminate continuous background noise from
The following chapters describe how the speakerphone implementation works and give
detailed hints about the values to be used for the different parameters. After discussion
of the block-diagram of the speakerphone, the speech detectors and the speech
comparators are described.
2.2
The ARCOFI-SP can be programmed with so called COP sequences ("Coefficient
Operation") and SOP sequences ("Status Operation"). Throughout this application note,
bold and uppercase abbreviations refer to CRAM coefficients to be programmed with
COP sequences (example: parameter ATT). Single bits or bit combinations to be set in
one of the registers are referred to as <Register>.<Bit> (example: GCR.SP). These bits
are always programmed with SOP sequences. For a description of all ARCOFI-SP
registers, please refer to the user’s manual.
The ARCOFI-SP offers a lot of CRAM coefficients which can be programmed. The hex-
value that corresponds to a certain physical value (e.g. B1 H 49 H representing 0dB
amplification in the GX stage) can be evaluated very comfortably with the ARCOS-SP
software or with the ARCOS-SP PLUS software (SIPO 2163) by pressing the right
mouse button. The ARCOS-SP PLUS software offers additionally hardware access to
program the ARCOFI-SP in different environments. The CRAM coefficients are not
completely documented in the user’s manual.
controlled by an intelligent control logic, which processes information about the
current and the past speech activities;
constants and separately programmable for signal and noise;
echo;
decision.
Notation and Coefficients
138
Speakerphone Implementation