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Enabling BIST for SATA on QorIQ P2041?

Question asked by stephene on Apr 10, 2014
Latest reply on Apr 11, 2014 by Wlodek_D.

Hello,

 

I'm attempting to verify the signal integrity of SATA lines on a board with a P2041. To do this, I intend to activate the BIST on the SATA PHY and take a scope capture of the eye diagram of the BIST signal.

 

Here's my process so far:

     1) Bring the Host controller online by setting the HControl[HC_ON].

     2) Force the PHY ready by setting PhyCtrlCfg1[FPRFTI] to b10.

     3) Trigger the device to send BIST-L (Far End Retimed Loopback) by setting PhyCtrlCfg1[LBP_EN] to b001.

     4) Poll HSTATUS[BE] for 0 ('0' indicates that Host controller is successfully in BIST mode).

 

I can successfully do steps 1-3, but step 4 never returns a 0. Would anyone be able to help me out?

 

Thank you!

 

Stephen

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