Hi Miguel,

The PIN_nDis is part of the N2HET Pin Disable Feature. This feature allows the user to disable the output buffer of the N2HET based on certain conditions.

You do not have to worry about this as long as the HETPINDIS register in the N2HET module is not modified (all zeroes by default). You can go ahead and use that pin for ePWM. You can find more info in the TRM( High End Timer (N2HET) Module > I/O Control > N2HET Pin Disable Feature) .

I’m not sure I understand your question about MIBSPI. Even in SPI you can send/receive data from many sources. MIBSPI just adds buffers to the SPI allowing it to trigger multiple transfers without CPU intervention. Please start a new thread for this query since it is unrelated to your original topic.

Thanks and Regards,

Vineeth

And what happens with N2HET2_PIN_DIS (pin 55)?? Do I need to connect it to something or can I connect it to GND?

What function does it really have?? I found this on the Reference manual but... Is not clear to me: 

Only the input functionality is supported so that the application can generate an interrupt whenever the N2HET2_PIN_nDIS is asserted (driven low). Also, a pull up is enabled on the input. This is not programmable using the GPIO module control registers.

Best regards!

Hi Miguel,

If you don’t want to use the Pin Disable feature, you don’t need to worry about the nDIS pin at all. You don’t need to connect the pin to GND or anything. You can use the physical pins(55 and 14) for other uses without knowing about the existence of this feature.

This feature is used to inform the NHET of a failure condition due to the PWMs(like overheating the motor). When this failure condition is informed to the NHET by driving the nDIS pin low, all NHET pins selected in the HETIPNDIS register will be set to high-impedence state. But we would also like an interrupt to go along with this(to service the failure condition). To this end, a GIO pin also shares the physical pin with the nDIS pin (GIOA[5] and GIOB[2]) which can be configured to raise an interrupt on a falling edge. I hope this helps.

Thanks and Regards,

Vineeth