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Contributor
Contributor
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Registered: ‎07-24-2018

JESD204B Active Lanes

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Does the JESD204B IP Core allow run-time configurability of the number of active lanes and their respective locations?

I have synthesized a JESD204B RX core for 8 lanes and currently want to use only 2 lanes (Lanes 1 & 2, such that the Lanes In Use register at offset 0x28 has a value of 0000 0110 - 0x6).

 

In a few months we will be transitioning to a full 8 lane ADC and it would be great if we could define in software which lanes were active.

 

I'm currently using an ADS54J66 with 4 lanes broken out over FMC (labeled A, B, C, D). Lanes A, B, C, D correspond to RX pairs 0, 1, 2, 3 respectively. The ADC data sheet claims that the active lanes in a 2 lane configuration are B & C, therefore the Lanes In Use register value should be 0x6. However, I fail to reach Lane Sync for all Lanes In Use configurations except for 0x3 (lanes A & B), and I only receive samples for two channels instead of four expected. Any advice would be appreciated. 

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Contributor
Contributor
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Registered: ‎07-24-2018

Solved - problem was with the ADS54J66 configuration. 

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Contributor
Contributor
702 Views
Registered: ‎07-24-2018

Solved - problem was with the ADS54J66 configuration. 

View solution in original post

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