17.3.4 CVD Mutual Capacitance Pins

The CVDTXx pins together with CVDANx pins can form mutual capacitance sensors. The CVDTXx waveform should follow CVD levels on the CVDANx pin to induce the mutual capacitance. The active CVDTXx are selected in ITCTXA, ITCTXB and ITCTXC registers.

The pins selected in ITCTXA are controlled by PCA[1:0] bits in the acquisition commands, the pins selected in ITCTXB are controlled by PCB[1:0] bits in the acquisition commands and the pins selected in ITCTXC are controlled by PCC[1:0] bits in the acquisition sequence commands.

The content (active CVDTX pins) of ITCTXA, ITCTXB and ITCTXC registers can be updated by DMA triggered from the acquisition sequence.