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MSP-TS430PZ100USB socket orientation incorrect

Greg Yancey
Prodigy 60 points

Other Parts Discussed in Thread: MSP430F6638

A heads up - Just wanted to point out after burning my finger that the socket on my Rev 1.2 MSP-TS430PZ100USB target board is oriented incorrectly - the pin 1 marker on the socket is on the upper-left which is connected to pin 76 on the PCB.  The socket needs to be rotated 90 degrees counter-clockwise.  I can confirm inserting an MSP430F6638 according to the socket pin marker will result in massive thermal runaway and a fried MSP...

  • 0
    Guru 17650 points

    Hi Greg,

    as far as I can tell from the design files MSP-TS430PZ100USB Development Board Schematics, Layout, and BOM everything looks good. Maybe you can post a picture of the target board in question?

    Rgds
    aBUGSworstnightmare 

  • 0 in reply to Joerg Quinten
    Prodigy 60 points

    The BOM calls out IC201-1004-008 as the socket while mine has IC357-1004-053N.  I can't find much information on the Yamaichi website regarding the specific differences but an ebay auction for IC201-1004-008 that I found shows that it doesn't have a molded pin 1 marker, which probably accounts for the confusion.

     

    Pictures: 

    http://i41.photobucket.com/albums/e257/gyancey/public/IMG_0126.jpg

    http://i41.photobucket.com/albums/e257/gyancey/public/IMG_0127.jpg

  • 0 in reply to Greg Yancey
    Guru 227245 points

    You're right, on he first picture, the marker is wrong.

    My socket on my 5438 breakout board does not have any marker on the socket.

    Looks liek there was a change in the socket supply, and nobody noticed that the mounting orientation is important now (before it was a don't care)

    However, on the board itself, pin 1 is clearly marked with a '1'.

    This doesn't keep you (and didn't keep me) from inserting the MSP wrongly by misinterpreting the marking ons the chip itself (the pin 1 marker was less visible than other markers in the other corners of the chip)

  • 0 in reply to Jens-Michael Gross
    Guru 17650 points

    Hi there,

    so, ones only reference when inserting the MCU should be the pin 1 marking on the PCB (silkscreen).

    You should mask the moulded pin 1 marker on the socket (i.e. a little piece of tape) and make a new one at the right place.

    Hopefully somebody at TI will update the manufacturing data for the target board to account this.

    Rgds
    aBUGSworstnightmare 

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