SPRUJ79 November 2024 F29H850TU , F29H859TU-Q1
For diagnostic purposes, the ADC can sample various internal node voltages using a special input selection mux called INTERNALTEST. The INTERNALTEST mux can be sampled on the ADCIN23 input channel of any of the ADC modules. Additionally, redundant INTERNALTEST connections are available on ADC-A channel ADCIN16, and on ADC-B channel ADCIN18. Internal test mode can be used to sample the VDDCORE voltage, VREFLO, VDDA, VSSA, and the CMPSS DAC outputs.
To enable internal test mode, write the desired node selection to the TESTSEL field of the INTERNALTESTCTL analog subsystem register. For details of internal test mux connections to various internal device voltage nodes, refer to the INTERNALTESTCTL register description.
To disable internal test mode, write 0 to the TESTSEL field of the INTERNALTESTCTL register.
When using internal test mode, the following special considerations apply: