psb21391 Infineon Technologies Corporation, psb21391 Datasheet - Page 115

• Manufacturer Part Number: psb21391
• Description: Siemens Codec With Upn Transceiver
• Manufacturer: Infineon Technologies Corporation

4
The codec bridges the gap between the audio world of microphones, earphones,
loudspeakers and the PCM digital world by providing a full PCM codec with all the
necessary transmit and receive filters.
Because the requirements for the codec correspond to the ARCOFI-SP PSB 2163 or
ARCOFI
characteristics are similar to those devices.
A block diagram of the codec is shown in figure 59.
The codec can be subdivided into three main blocks:
•
•
•
A detailed description can be found in the following chapters.
Figure 59
Architecture of the codec
Data Sheet
V
BGREF
AXI
MIP1
MIN1
MIP2
MIN2
LSP
LSN
HOP
HON
REF
Analog Front End (AFE)
Digital Signal Processor (DSP)
Codec Digital Interface (CDI)
®
-BA PSB 2161 respectively the architecture, functionality and transmission
Codec
VREF
AIN-
MUX
AMI
ALS
AHO
AFE
A/D
D/A
Dec
Int
Dec
Int
105
Frequency
Correction
Filter
Digital Gain
Adjustment
Speakerphone
Function
Tone Generator
Sidetone
DSP
CH1X
CH2X
CH2R
CH1R
C010X
C011X
C020X
C021X
C020R
C021R
C010R
C011R
Control/
config.
Data
CDI
PSB 21391
PSB 21393
IOM-2 Handler
µC Interface or
Monitor Handler
2001-03-07
codec_arch.vsd
Codec