TMS320F28075: Handling of CMPIN6N, CMPIN6P, and CMPIN5P

Hi O.H,

O.H said:

If the above pins are not used, should they be connected to GND? Or should they be left open (Float)?

If those pins are not used you can connect them to GND but leaving them open is okay as well.

O.H said:

If the same signal is input to CMPIN6N and CMPIN6P pins in parallel, is there a possibility that CMPIN6N and CMPIN6P will affect each other or other CMP pins?

This depends on whether you are using CMPIN6 and if you are using the internal DAC of the comparator as the (-) input or if you are using CMPIN6N as the input. If you are not using CMPIN6 at all then there shouldn't be an issue. If you are using DACVAL for the (-) input then it should be okay for CMPIN6N and CMPIN6P to have the same value. However, if both inputs are being used as inputs into the comparator and the comparator is being used then yes, this will cause issues as your reference will be the same as the input.

Best Regards,

Marlyn