• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 99 subscribers
  • Views 215 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.

C6678 p100

Wenjun Huang
Expert 1770 points

In Section 7.3.1 Power supply sequencing, there is this "AVDD1, AVDD2 (HHV)".

What does HHV stands for?

  • 0
    Expert 1770 points

    For the second power sequence choice with IO voltage starting before core voltage,

    1. DVDD18, AVDD1, AVDD2 (HHV)

    2. CVDD

    3. CVDD1, VDDT1-3

    4. DVDD15, VDDR1-6

    1 and 4 are IO voltages while 2 and 3 are core voltages (correct me if I am wrong). So, it is not actually IO voltages starting before core voltages, as core voltages is sandwiched between the 2 IO voltages?

  • 0 in reply to Wenjun Huang
    TI__Mastermind 42545 points

    1 - You may be looking at an earlier version of the data manual, in the present version there is no mention of HHV. 

    2 - You are correct that the core voltages are sandwiched between the 1.8V IO voltage and the 1.5V IO voltage.  To be more specific we should have called it 1.8V IO before core but the data manual is accurate.  The second sequence was intended to simplify power sequencing for customers that use a 1.8V before core sequence for a different part on their board.