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chwila
chwila
Visitor II
April 18, 2016
Question

STM32F745 First pin location

  • April 18, 2016
  • 3 replies
  • 1207 views
Posted on April 18, 2016 at 14:42

Hi,

I'm trying to  launch a new board with STM32F745ZGT6 (LQFP144). I see, that MCU case looks slightly differ to the one presented in datasheet on page 207 DocID027590 Rev 4. So I would make sure for the proper position of the first pin.

Could sb confirm where the first pin should be located on CPU in attached picture?

0690X000006038cQAA.jpg

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    3 replies

    Nesrine M_O
    Nesrine M_O
    Associate
    April 18, 2016
    Posted on April 18, 2016 at 15:47

    Hi chwila.sebastian,

    The right pin 1 position is on the left bottom corner as it is detailed on the Figure 88 and Figure 90 in the

    http://www2.st.com/content/ccc/resource/technical/document/datasheet/96/ed/61/9b/e0/6c/45/0b/DM00166116.pdf/files/DM00166116.pdf/jcr:content/translations/en.DM00166116.pdf

    related datasheet.

    -Syrine-

    Tesla DeLorean
    Tesla DeLorean
    Guru
    April 18, 2016
    Posted on April 18, 2016 at 19:15

    Bottom left by White Dot, Pin#1Another thread looking at orientation mark, vs tooling marks, all except last image I have an arrow pointing to the orientation mark.

    https://community.st.com/0D50X00009Xka68SAB

     

    Edit: Fixed DEAD LINK, original post from 19-Apr-2016

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    re.wolff9
    re.wolff9
    Senior
    April 19, 2016
    Posted on April 19, 2016 at 10:17

    The 64-pin chip also has a clear dot on the opposite side. Indeed difficult to determine which one is the ''pin 1 indicator'' and which one is ''just a molding artefact''. 

    Hint for ST: If the molding artifact is always round, make the pin-1-indicator square. 

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