• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 98 subscribers
  • Views 413 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

66AK2H14: De-asserting POR and RESETFULL

Madhu Sharma
Expert 2915 points
Part Number: 66AK2H14


Hi,

In hardware user-guide and the datasheet of 66AK2h14, POR and RESETFULL must be de-asserted only after all the SOC powers are up.

But in EVB of 66AK2H14, POR and RESETFuLL are up before VPP1V8 is up ( as per power sequence diagram in page 6).

So I would like to know whether the statement given in user-guide and datasheet is mandatory.

Regards,

Madhu

  • 0
    TI__Guru 65405 points
    Hi Madhu,

    I've forwarded this to the hardware design experts. Their feedback should be posted here.

    BR
    Tsvetolin Shulev
  • 0 in reply to Cvetolin Shulev-XID
    TI__Mastermind 46460 points

    Madhu,

    You are confusing the power supplies.  The supply that you see coming up after PORz and RESETFULLz is VPP1V8.  That is the supply used for programming security keys when provisioning secure devices.  The 1.8V I/O supply for the 66AK2H device is labeled VCC1V8 in this diagram.  This is the supply connected to the DVDD18 supply pins on the 66AK2H device.  It clearly must come up before PORz and RESETFULLz rising.  The sequence in the Data Manual must be met.

    Tom