I'm currently evaluating different boards in order to read EEPROM and Flash accesses by attempting to read the bus lines with a logic analyzer. While for SMDs using TQFP (and other similiar packaging) there is a possilbity to attach probes to them, are there any ways to do it with QFN or BGA without desoldering the chips? Can I somehow use these holes (or are they vias) for this purpose?

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I'm thankful for any tips/hints.

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