PSB2163T-V31TR Infineon Technologies, PSB2163T-V31TR Datasheet - Page 141

• 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
Figure 4
Signal Flow Graph of the Whole Speakerphone Support Block
2.4
This chapter explains the interaction of all the blocks seen in figure 4, and the three
different steady-state modes of the speakerphone. The inside of the speech detectors
(SD) and the speech comparators (SCAE, SCLE) including all programmable
parameters is explained in the following chapters.
Basically, we have to distinguish three steady-state modes with dynamic transitions
between them:
Table 1
Steady-State Modes when the Speakerphone is Active
Mode
TRANSMIT
RECEIVE
IDLE
The task of the attenuation control unit (see figure 4) is to decide which mode should be
effective. The information needed for decision is delivered by the two speech detectors
SD and the two speech comparators SCAE, SCLE. Assume the automatic gain control
stages AGCX and AGCR as switched off.
Basics about the Speakerphone Algorithm
Attenuation in GHX-stage
yes, determined by ATT
no, 0dB
yes, ATT / 2
140
Speakerphone Implementation
Attenuation in GHR-stage
no, 0dB
yes, determined by ATT
yes, ATT / 2