Resolved! STM32L4 - are pullups during reset active when RDP level is 2?
Citing from the STM32L431 manual:The debug pins are in AF pull-up/pull-down after reset:• PA15: JTDI in pull-up• PA14: JTCK/SWCLK in pull-down• PA13: JTMS/SWDAT in pull-up• PB4: NJTRST in pull-up• PB3: JTDO in floating state no pull-up/pull-downLet's...