[C6655] Confirmation of power down sequence

Naoki Kawada

Guru 19890 points

Hi,

My customer has a question about power down sequence for C6655.
The data sheet states there are two supportable power up sequences -- Core-Before-IO and IO-Before-Core, and they are using Core-Before-IO for power up sequence. I know the power down sequence is reverse order of power up sequence, but in fact their current power down sequence looks reverse order of IO-Before-Core, not Core-Before-IO. Is this allowed use case in device perspective ?

Best Regards,
Naoki

over 9 years ago

0 Senthilkumar Srinivasan over 9 years ago

TI__Mastermind 43660 points

Naoki,

The KeyStone I devices support two different power sequences, 1.8V-AVS-1V-1.5V (IO before core)and AVS-1V-1.8V-1.5V (core before IO). The reverse of either sequence may be used for as a power-down sequence regardless of which was used for the power-up sequence.

Please refer below thread for more details.

e2e.ti.com/.../140558

Regards,
Senthil

0 Naoki Kawada over 9 years ago in reply to Senthilkumar Srinivasan

Guru 19890 points

Hi Senthil,

Thanks for your help. Understood. I close the thread.

Best Regards,
Naoki

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[C6655] Confirmation of power down sequence