Questions about NXP IC S32M276CHABMKHSR - GDU function

[Ted_Qiao]

Hi NXP technicians,

I encountered one problem about using the GDU function of S32M276CHABMKHSR.

I want to measure the phase-voltage by HSX pins while motor is stopping.

The phase-voltage will be supplied with [DO-EN-MOT-DIAG] set to high-level, If the motor is not connected, only W-phase-voltage could be detected by HS2 pin.

but in my measurement, all HS0, HS1, HS2 detected the voltage similar to KL30-F(battery voltage) when motor is not connected.

I figure out the reason is that HGX is output voltage similar to KL30-F then the voltage will go through Vgs resistor(R604, R609, R614) to supply the phase-voltage.

So my question is that how could I do the setting to make the High-side gate voltage and Low-side gate voltage to [0] voltage while GDU module is Enabled. Then I want to use the HSX pin to measure the phase-voltage.

*You could take the reference to the BLDC driver circuit as attached PDF file.

if anything unclear, pls. contact to me.

Looking forward to your reply. Thanks and have a nice day!

BR, Ted

[danielmartynek]

Hello @Ted_Qiao,

I'm sorry for the delay; we experienced a technical issue with our community‑tracking system.
Is this question still open?

Thank you,

Daniel

[Ted_Qiao]

I forgot the attachement.