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sanhu
Contributor
Contributor
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Registered: ‎12-04-2014

aurora initialization fail in A7200 in low temperature

I have two board communicate with aurora , works well in normal temperature , but fails in temperature lower then -4℃.

Tx side is a xc7a50tfgg484-2 working in Simplex Tx mode , Rx side is a xc7a200tfbg484-4 working in Simplex Rx mode .

Both are set as line rate 2.376Gbps , Framing , Timer mode .

Both are developed with vivado 2017.3 .

Tx side is in normal temperature , Rx side is in a thermostat , in which temperature can be handly-adjust .

Fisrt , I set thermostat higher than -4℃. power-up Tx and Rx ,Tx / Rx initialize ok and both are channel_up . 

Second , I reset Tx side , both Tx / Rx initialize ok and both are channel_up when reset finish. 

Third , with Tx / Rx channel-up , I adjust thermostat so that temperature falls slowly to -40℃ , Tx / Rx communicate ok .

And next , I reset Tx side , when reset finish , Tx side send initialization sequence to Rx side and channel_up=1, but Rx side failed initialzation with channel_up=0.

Last , I set I set thermostat higher than -4℃ , reset Tx side , both Tx / Rx initialize ok and both are channel_up when reset finish. 

This exam shows initialization fails in low temperature . what may be the problem .

By the way , I have tested the Rx side whith hd-sdi camera . it works well when configured to receive 1.5Gbps HD-SDI camera , with temperature from -40℃ to +50℃ , which means the Rx side gtp channel is hardware ok .

 

Thanks for any suggestions.

 

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venkata
Moderator
Moderator
539 Views
Registered: ‎02-16-2010

During the failure, what do you observe on the following status signals?
rx_reset_done_out
tx_lock
sys_reset_out
soft_err
hard_err
link_reset_out
lane_up
channel_up
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