In STLink settings menu we can chose JTAG or SWD but which JTAG and SWD mode is it?
Full SWJ (JTAG-DP + SW-DP) - Reset State
Full SWJ (JTAG-DP + SW-DP) but without NJTRST
JTAG-DP Disabled and SW-DP Enabled
Trying to figure out why MODER change from ALT to GEN dont work, whether it's the host who didnt send the right JTAG sequence (required for F4) or if there is bugs in F446 JTAG/SWD interface (one mentioned in errata).
Is it normal for a device under default JTAG-DP + SW-DP in which SWD is used that a logic low on PA15 JTDI
will cause system halt or similarly?
As mentioned last in link below that does not work, GPIO are stuck in ALT mode which confirms RM00090:
>>When debug pins (JTAG or SW or TRACE) are mapped, changing the corresponding IO pin configuration in the IOPORT controller has no effect.