To begin, this is a board TEST question rather than a design question: Has anyone successfully generated digital In-Circuit Test vectors for the STM32F4xx families using the Keysight 3070 or Teradyne scan tools? I successfully modeled the part describing the cortex and Jtag cores in a part description library - this way both core's instruction registers are accounted for etc, however it didnt' work in practice. Bottom line, i just get NOTHING out of TDO during test. I can successfully program the parts all day with the st-link v2 pod, so i know signal and device integrity is good. but board test is another matter. This makes me wonder if there are unpublished compliance pins besides nrst. So question to the forums - anyone out there doing board test? if so any boundary scan successes to report? i have had sucess with the STM32F103RB, but the 407 i'm getting nowhere. thoughts?