AnsweredAssumed Answered

About SATA power state transition in i.MX6DQ.

Question asked by Keita Nagashima on Aug 5, 2015
Latest reply on Aug 27, 2015 by Artur Petukhov

Dear All,

 

[Problem]

The Power mode of SATA can not be changed from the "Slumber" to "Active" condition.

 

[Condition]

Device : i.MX 6Dual

Board : Custom

 

[Description]

Write SATA_P0CMD[ICC]=1h to change into the "Active" condition.

After that, the value becomes 6h when reading SATA_0PSSTS[IPM] (not 1h).

 

[Question]

Refer to "53.3.5.2 Power Management Operations" in IMX6DQRM Rev 2, 06/2014.

When writing SATA_P0CMD[ICC] = 1 h, how does it request to change the "Active" state from i.MX6D to external SSD?

(Does it send a command from the host controller?)

 

Best Regards,

Keita

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