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Frank van Dinteren
Visitor II
March 21, 2023
Question

STM32L4A6ZG boundary scan has stuck inputs every 24 cells

  • March 21, 2023
  • 0 replies
  • 864 views

Our design has a STM32L4A6ZG, we are using our own boundary scan tool to test the PCB. During testing we found that input of PF1 (cell 375) and PD13 (cell 207) where always high after some more investigation it looks like the inputs that are 24 cells appart alway readback as high. (PE3 - cell 399 / PF9 - cell 351 / PA0 - cell 327) no matter the actual level on the pin. they alway come back as high. The other pins work as expected0693W00000aJOHDQA4.jpgIs this a know issue, or maybe there is a workaround to get them to work properly?

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