The accuracy of the internal oscillator DCO differs depending on the mode. In addition, when using the external resistor mode, it is possible to suppress variations due to temperature.

For actual accuracy, there is a comparison in the datasheet.
See the datasheet for details.
URL: http://www.tij.co.jp/general/jp/docs/lit/getliterature.tsp?genericPartNumber=msp432p401m&fileType=pdf
Corresponding part: Table 5-11. dfDCO/dT of DCO

*This answer is based on the data sheet as of Rev.F.
Please note that chapters and drawing numbers may change when the datasheet is updated to a new revision.


Please refer to the Technical Reference Manual for details on modes.
URL: http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=SLAU356&fileType=pdf
Corresponding part: P312 5.2.8.1 DCO Modes

*This answer is for the manual at the time of Rev.F.
Please note that chapters and figure numbers may change when the manual is updated to a new revision.