Digital voice interface DAI description

We are working on an echo cannelation handled by an embedded PC on Linux. We miss the specification of the digital voice interface for HiLo V2. Where we can download it? Thx in advance for an answer.
Regards
Harald Naumann

Hi Harald,

Does this two help?
http://developer.sierrawireless.com/en/Resources/Resources/SagemcomM2M/HiLo/HiLo_V2_Technical_Specification.aspx
http://developer.sierrawireless.com/en/Resources/Resources/SagemcomM2M/HiLo/HiLo_V2_Interface_Board_User_Guide.aspx

Thx

The file just shows
3.2.2 Digital Audio

The HiLo V2 M2M module features a PCM interface.
The PCM interface is a High speed full duplex interface that can be used to send and receive digital audio data to external audio ICs.
PCM interface features include the following:
• PCM master mode
• Full duplex operation
• 16 bits PCM data word length
• PCM clock rate 1MHz
I need a details description of the PCM interface. You tell external audio ICs. Do you mean WM 8978 and MAX 9853?
wolfsonmicro.com/products/audio_hubs/WM8978/
maximintegrated.com/datashee … vp/id/4840
I need the detailed software description of the DAI. Please note the we will ge the first sample PCBs next week. We wired the 4 lines from the HiLo to our micro processor. Next step is to read and to write the PWM at the audio interface.

Hi Harald,

In this case, please contact your distributor and FAE for further info.

Thx

I am in a loop. I am the FAE Wireless of one of the biggest distribuors worldwide. I am also close to 20 years in celluar modules and have replaced the GSM module of the competition with DAI to a Sierra HiLo.
Please be so kind and help with an answer. Thx in advance.

Hi Harald,

Could you please check below doc available:

http://developer.sierrawireless.com/en/Resources/Resources/SagemcomM2M/HiLo/HiLo_V2_Application_Note.aspx

  • Page 25 for PCM info, timing
  • Page 54 for schematic of demo board, PCM part (which interface with MC145483EJR2)

http://developer.sierrawireless.com/en/Resources/Resources/SagemcomM2M/HiLo/HiLo_AT_Command_Interface_Specification.aspx

  • All AT command relate to PCM
  • Section 12.19 - AT command to configure PCM Digital Audio

Anyway, I am not sure if I am the best guy to answer your query and here is not the official support channel, in additional to the time zone different which may delay the respond…
So, I encourage you to discuss with your local Sierra FAE in contact if info here is not enough.

Thx

Your answer looks good. I will hand it over to my customer. The MC145483EJR2 performs the voice digitization and reconstruction as well as the band limiting and smoothing required for the voice coding in digital communication system. And the MC145483EJR2 is made by Freescale. Freescale has a pretty good support and is on our line card. Link to MC145483EJR2:
http://www.freescale.com/files/timing_interconnect_access/doc/data_sheet/MC145483.pdf

Hi Harald,

Glad that you seems satisfied with the info.

Again, if you have similar query next time, please consider to discuss with the Sierra FAE in touch to avoid any delay.

Have a nice day.

I am sorry, but the Sierra FAE has not answered my question right now. I send already several reminders. Just to let you know, that I am close to 20 years in GSM and GPS. In the moment I am writting a book “How to design a M2M device on GSM and GPS?”.
I forwared your information and wait for the PCBs. I am keen to see if we really get a better echo cannelation by running code on the single PC based on Freescale iMX6. I will keep you posted.