Specifications

AirPrime Embedded Module Hardware Integration Guide
48 Proprietary and Confidential 2130114
These modules are intended to serve as an integral component of a more
complex audio system—for example, a PDA with a separate codec interfaced to
the Host Application processor.
Usually, the interface between the module and the host audio system is set to
line-level amplitudes with no transducer considerations. The responsibility of the
module codec or host codec for special functions is detailed in Tabl e 4- 2 on
page 48.
System block diagrams
Note: When integrating the module into your host platform, make sure the module has
sufficient shielding to prevent RF interference.
MC5727V system block
Figure 4-1 on page 49 represents the MC5727V module’s audio system block,
and includes the following features:
• Module interconnects are shown on the left side of the diagram. The audio
interface uses the signals:
· MIC_P/MIC_N
· SPK_P/SPK_N
Note: Make sure the host
device includes DC
blocking capacitors on the
Audio In lines – the module
does not include series
capacitors.
• Dynamic ranges for each programmable gain stage are listed, with the
following constraints:
· MIC_AMP1 is programmable in discrete steps only
· MIC_AMP2 (MC5727V only) is programmable in discrete steps only
· CodecSTGain, when set to the minimum setting, effectively mutes sidetone
in the module codec
Table 4-2: Codecs responsible for special functions
Function Responsible Codec
Phone oriented (e.g., echo
cancellation, FIR filtering)
Module codec
Path-switching Host codec
Transducer interfaces Host codec
Adjustable gain/volume settings Either
DTMF/ringer tone generation Either
Mixing Host codec