MPC 8260/70 MCC SI Clocking and TSA Sync

[Manish Joshi]

Hi,
 
I am trying to bring up MCC (Multi Channel Communication controller) on MPC8270 board for T1/E1.
The overall configuration looks fine since I am able to have a communication properly if I do a T1 Cross over Loopback and tx/rx HDLC data.
The things do not work smoothly if I connect my T1 line with an external device and start HDLC.
I am seeing 'NO' (Rx Non-Octet Alligned Frame) errors in my rx buffers. Sometimes I also see Rx abort errors.
I do not see this issue on the tx side i.e the external device does not report any of these when I tx HDLC data to it.
 
Does anybody have any experience dealing with this ? 
 
As far as clocking and sync with TSA is concerned, I have just configured 
CMXSI2CR register with 0x00 ( I have only TDM2A driven by CLK1) and nothing else. 

Do I need to do something more for clocking etc? Also I am doing this before SI initialisation.

I will also try doing it just after TDM init and see if it helps.

Please help.

 

Thanks,

-Manish

 

 

 

 


		
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