ADCINC does not consume any block.This ADC is actually a part of SPC (System Performance controller). All access to control and recover the result is through two registers used to interface the main M8C processor and the SPC. The input voltage is fixed at 0 to 1.2V.
The ADCINC programming interface allows the user to select between polling the SPC or checking a status bit that is set with the SPC interrupt.
Please refer to the ADCINC user module datasheet for more details.