29.6.3 PTC Digital Controller
The PTC digital controller is a peripheral of the pPP. It is intended for acquiring capacitive touch sensor and capacitive proximity sensor signals under limited firmware control by the controlling processor. The PTC digital controller consists of an Analog Charge Integrator and a 10-bit ADC Controller, 16-bit Digital Accumulator for the ADC results and a State Machine taking care of sensor sampling and digital accumulation sequence.