User's Manual
Table Of Contents
- 1.0 Connection Diagram
- 2.0 Introduction
- 3.0 Cordless Voice Module functionality
- 4.0 Functional description
- 5.0 CAT-iq
- 6.0 Specifications
- 7.0 Design guidelines
- 8.0 Audio Level Adjustment
- 9.0 Example Application Diagram
- 10.0 Mechanical Dimensions
- 11.0 Module integration
- 12.0 UTAM membership waiver
- 13.0 Soldering
- 14.0 Notices to OEM
SC14CVMDECT Cordless Voice Module
© 2011 SiTel Semiconductor B.V. Company Confidential 19 August 19, 2011 v1.2.1
4.3.3 PP Audio Codec adjustment
The audio codec settings for the loudspeaker and
Microphone must be preconfigured in the EEPROM for
each mode. The EEPROM parameter fields for
Audio.Earp.xxx, the Audio.Heads.xxx and
Audio.SpkPh.xxx have a default value but may be
modified to tune the settings.
4.3.4 General Audio adjustment
For each audio mode, the receive (RLR) and transmit
(SLR) audio paths must be adjusted. RLR and SLR are
adjusted in the registers in the EEPROM for each
audio state; see document reference [2].
4.3.5 Power management
To minimize the current consumption the PP will
shutdown all codec amplifiers in Idle state. This means
that all reference voltages in the front-end will be
disabled. This feature can be disabled in the EEPROM
if the reference voltages for some reasons are needed
in Idle state.
4.3.6 Earpiece Mode
In Earpiece mode (Handset Speaker) an artificial
sidetone is generated. The level of the sidetone can be
adjusted and setup in the EEPROM through parameter
fields Audio.Earp.Vol.Elementx,SideToneGain and
Audio.Heads.Elementx.SideToneGain. In Earpiece
mode it is possible to adjust the volume in the Earpiece
via the API calls. In Earpiece mode the PP audio is
routed as shown in Figure 11.
4.3.7 Alert mode
The Alert mode is for generating tone and melodies in
the Speakerphone loudspeaker. In Alert mode it is
possible to adjust the volume in the speaker via the
API calls.
4.3.8 PP Volume
The PP supports 6 volume steps, which are EEPROM
configurable through parameter fields
Audio.Earp.Vol.xxx, the Audio.Heads.Vol.xxx and
Audio.SpkPh.Vol.xxx. The volume steps must be set
initially in the EEPROM during production.
.
Inband tones will be affected by the volume
adjustments, since the volume control is placed after
tones are added to the signal..Figure 11 shows the
Audio flow. Here is the list of main functions:
EQ Equalizer
nc100Hz 100Hz canceller
Sidetone Sidetone
EC Echo Canceller
Vol. Ctrl Volume Control
Tonegen Tone generator
Figure 10 Handset Volume Configuration