PCM slots description


#1

Hi,

The Q2686 Product technical Specification say:
3.21 Digital Audio Interface (PCM)
Digital audio interface (PCM) interface mode allows connectivity with audio
standard peripherals. It can be used, for example, to connect an external audio
codec.
The programmability of this mode allows to address a large range of audio
peripherals.

But I am unable to find any clear description of the available PCM slot on the Q2686.

More precisely I search a way to connect a external filter component on the PCM bus. This require to know:

  • The slot on the PCM-OUT signal where the external filter can read the audio stream received from the GSM call.
  • The slot on the PCM-IN signal where the external filter can write the audio stream to be send to the speaker.
  • The slot on the PCM-OUT signal where the external filter can read the audio stream received from the microphone.
  • The slot on the PCM-IN signal where the external filter can write the audio stream to be send to GSM call.

If this mode of operation in not supported, is there a least a way to read the audio stream received from the GSM call and to write the audio stream to be send to the GSM call ?

Regards,