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66ak2l06: 66ak2l06

bryan ogilvie
Intellectual 350 points

Part Number: 66AK2L06
Other Parts Discussed in Thread: 66AK2L06

Hello,

I am reading the data sheet regarding the device reset which supports por, hard, and soft reset.  Our current configuration of the fielded radar we are upgrading to utilize the 66ak2l06 resides in a location which, if something goes wrong, is simply powered down and then powered down.  There is no support for anything but the POR.  My question is while we are in the prototype development phase, can I utilize a temporary master reset switch which will always cause the POR sequence to occur when pushed so that I do not have to power up/down the lab supplies during code development stage?  This will force the board to go through the entire POR sequence even though the lab power supplies and board regulators are already up and stable.  thanks in advance. -b

  • 0
    TI__Guru 65405 points
    Hi Bryan,

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

    BR
    Tsvetolin Shulev
  • 0 in reply to Cvetolin Shulev-XID
    TI__Mastermind 23725 points
    Hello Bryan,

    I think your question boils down to figuring out if issuing POR to the devices has the same effect as Powering down the supply rails and then back.

    Short answer is Yes. After power supply toggle , POR is the natural sequence that happens on the board if you are using the TI EVM which has the correct POR sequence implemented on the board.

    Please make sure the correct POR sequencing is implemented on the board you are using.
    Ref: 11.2.1 Power-Up Sequencing in device manual.

    Hope that helps.

    Thank you,
    Vaibhav
  • 0 in reply to Vaibhav Mahimkar
    Intellectual 350 points
    Hi Vaibhav, What I want to do is to simply restart the whole power up sequence when a master reset button on the board is pushed, which will cause a reset to the main power sequencer fpga (MAX10) device running on +3.3V. The fpga will simply restart the whole cold power up sequence including disabling the board low voltage rails (when reset goes low) then re-enabling them and monitoring the power good in a normal power up sequence. I believe this will just cause a cold start just like if the initial main board power (+3.3V), which is used to regulate all of the low voltage rails, was initially turned on. Does this sound okay to you?
  • 0 in reply to bryan ogilvie
    TI__Mastermind 23725 points
    Hi Bryan,

    That should be fine. As long as the correct power on sequence is followed device will come up as expected.

    Thank you,
    Vaibhav