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MSP430F5659: USB BSL Sequence

SRC
Intellectual 260 points

Part Number: MSP430F5659

Hi,

Is there any timing waveform describing USB BSL sequence covering the following:

  1. Minimum time duration required for PUR pulled high to reset# released.
  2. Minimum time duration required to remove PUR before BOR after flashing the user image.
  3. Minimum duration for generation of VUSB(3V3) after providing VBUS. 
  4. Minimum duration for external VCC to PUR pulled high. 

I could find the BSL sequence in the following  : "http://www.ti.com/lit/an/slaa452c/slaa452c.pdf". But could not find any timing parameters mentioned in this document. Can anyone help me in finding the required information?

  • 0
    TI__Genius 10980 points

    Hi,

    All additional information, besides the document that you referenced, that would contain BSL information would be in slau319 or the device datasheet (http://www.ti.com/lit/gpn/msp430f5659). The specific timings that you listed are not published anywhere that I know of because they would be specific to each MSP430, but I'll give some guidelines here:

    1. PUR just needs to be held high until a BOR occurs. As soon as a BOR occurs, the PUR pin is the first thing that is checked.
    2. The PUR pin just needs to be pulled low before the BOR finishes. For BOR info specific to this device, please see the datasheet.
    3. I am not sure what you mean by this one. Could you please elaborate?
    4. Again, PUR would just need to be pulled high as soon as the BOR occurs.

    Regards,

    Nathan

  • 0
    TI__Genius 10980 points
    Hi,

    Has this issue been resolved? If so, please mark it as answered. If no response soon, this thread will be closed due to inactivity.

    Regards,
    Nathan

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