AD9675 start code

Question

I'd like to clarify how the AD9675 start code is overlaid onto the data stream; specifically: 
 
 Does the start code appear once per channel or once per lane? 
 If the latter, does it always appear on the lower channel (i.e., A on SERDOUT1, C on SERDOUT2, etc. assuming four-lane mode), upper channel, or either channel? 
 
 Thanks for your reply.

DougI · Accepted Answer

Hi Tony, 
 Thank you for your interest in AD9675. The engineer who knows about this part is out-of-the-office today. I'm filling in and I'll pass along the information I've been able to gather. 
 
 The Start Code appears once per lane. 
 It appears before the first (or as you say, "upper") channel's data. 
 
 In other words, for 4-lane mode: 
 SERDOUT0: STARTCODE, CHA data , ChB data, ChA data, ChB data,…. 
 SERDOUT1: STARTCODE, CHC data , ChD data, ChC data, ChD data,…. 
 SERDOUT2: STARTCODE, CHE data , ChF data, ChE data, ChF data,…. 
 SERDOUT3: STARTCODE, CHG data , ChH data, ChG data, ChH data,…. 
 Thank you. 
 Doug)

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AD9675 start code