PSB21373HV1.1XT Infineon Technologies, PSB21373HV1.1XT Datasheet - Page 140

• Manufacturer Part Number: PSB21373HV1.1XT
• Manufacturer: Infineon Technologies

Specifications of PSB21373HV1.1XT

• Lead Free Status / RoHS Status: Compliant

4.5
A so called “controlled monitoring” can be done when the bit GCR.CME is set. This mode
can only be used together with the speakerphone mode (GCR.SP). With CME = ’1’ the
attenuation stage GHR is fixed to a value of 0 dB but the attenuation takes place in the
analog loudspeaker amplifier ALS in a way that the amplification of the ALS is set to –
9.5 dB or -21.5 dB (depends on ATCR.CMAS setting) as soon as the attenuation control
unit switches to transmit mode. Therefore in transmit direction the same behavior as in
speakerphone mode occurs but in the receive direction the handset output offers a signal
as in normal handset mode while the volume at the loudspeaker output will be reduced
to a low level during transmit mode. If the programming for the loudspeaker output
(ARCR.LSC) is already chosen for values of less or equal – 9.5 dB, no further attenuation
takes place.
In order to get a stable controlled monitoring due to the feedback of the microphone
signal to the loudspeaker via the sidetone stage it is possible to change the tap of the
sidetone signal from before to after the attenuation stage (PFCR.PGZ = ’1’).
4.6
The codec offers several possibilities of manipulating and controlling the codec data to
support a variety of applications and operating modes. All the functions and modes can
be selected by setting the register bits listed in table 20. The signal paths and functions
are illustrated in the voice data manipulation block of figure 58.
Possible applications and operating modes which can be realized by the voice data
manipulation of the codec
integrated IOM-2 Handler are e.g.:
• Three party conferencing with
• Communication between codec and other voice data processing devices on IOM-2
• The data formats
• Monitoring a running phone call
Data Sheet
- 1 device internal and 2 external subscribers or
- 2 device internal, tip-ring extension and 1 external subscriber
The addition of the subscriber information can be done completely in the terminal by
the integrated codec
(e.g. ACE, Jade, SAM and ISAR)
PCM A-Law
PCM µ-Law
8-bit Linear and
16-bit Linear are provided.
The 8-bit formats of CH1 and CH2 in both directions can be masked by an
implemented mask register
Controlled Monitoring
Voice Data Manipulation
together with the time slot and data port selection of the
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PSB 21373
2002-05-13