PSB21473FV13XT Infineon Technologies, PSB21473FV13XT Datasheet - Page 402

• Manufacturer Part Number: PSB21473FV13XT
• Manufacturer: Infineon Technologies

Specifications of PSB21473FV13XT

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Lead Free Status / RoHS Status: Compliant

Data Sheet
The noise reduction unit attenuates frequencies with a great ratio of the noise energy
level to the level of the speech signal. The maximal attenuation of the noise reduction
unit can be programmed by the parameter NRATT.
There are some restrictions for the simultaneous selection of the speakerphone (refer to
Chapter 20.3). Different trade-offs can be selected with the parameter MD.
Note: The Noise Reduction unit should be directly connected to the Line-In signal.
Table 20-22 Peak Detector Registers
Register
NRCTL
NRCTL
NRCTL
NRATT
20.1.11
The DSP contains two identical equalizers which can be programmed individually. Each
equalizer can be inserted into any signal path. The main application for the equalizer is
the adaptation to the frequency characteristics of the microphone, transducer or
loudspeaker.
Each equalizer consists of an IIR filter followed by an FIR filter as shown in Figure 20-25.
Otherwise it can cause acoustic distortions.
Equalizer
# of Bits
1
2
5
15
Name
EN
MD
I1
NRATT
Comment
Noise Reduction Unit Enable
Select restriction of speakerphone
Input signal selection
Maximal attenuation of the noise reduction unit.
402
Digital Signal Processor
PSB 21473
2003-03-31
INCA-D