I’m using the X-NUCLEO-IHM16M1 BLDC driver board, which is based on the STSPIN830, together with a NUCLEO-F446RE. In the STSPIN830 datasheet, ST clearly mentions that the device supports both 3-PWM and 6-PWM input modes.
But in practice, on this expansion board:
- Only INU / INV / INW are connected to the MCU
- ENU/ENV/ENW are present but “NP” (Not Populated) unless manually soldered
- None of the INxH / INxL pins (the 6-input mode pins) are routed to the Nucleo connectors
- TIM1 complementary outputs (CH1N/CH2N/CH3N) have nowhere to go
- Motor Control Workbench only allows 3-PWM mode for this board
The user manual (UM2415) seems to confirm that the 6-input mode requires hardware changes: removing R12, replacing R11, and populating the NP resistors that route INxH/INxL to the MCU. Out of the box, the board is locked to 3-PWM “direct driving” mode.
My question:
Has anyone actually gotten TRUE 6-PWM complementary drive (TIM1 CHx + CHxN with dead-time) working on the X-NUCLEO-IHM16M1?
Not "6 logic inputs", but actual complementary PWM pairs like you’d use for a 3-phase inverter.
If yes:
- Which resistors/jumpers did you solder?
- Which pins did you remap on the Nucleo?
- Did you modify the board to expose INxH/INxL?
- Does MCSDK support this configuration at all, or do I need to go full custom firmware?
- And is the internal interlock/deadtime in STSPIN830 going to interfere with MCU-generated complementary PWM?
If this is fundamentally impossible due to how the board is routed, I’d like to confirm that too before I switch to a different driver (DRV8303/8353, IR2101, L6386, etc.).
Anyone who has tried this, please let me know — ST’s documentation is a bit confusing here!
