Tsc Functional Description; Tsc Block Diagram; Surface Charge Transfer Acquisition Overview; Figure 127. Tsc Block Diagram - STMicroelectronics RM0365 Reference Manual

RM0365
19.3

TSC functional description

19.3.1

TSC block diagram

The block diagram of the touch sensing controller is shown in
diagram.
19.3.2

Surface charge transfer acquisition overview

The surface charge transfer acquisition is a proven, robust and efficient way to measure a
capacitance. It uses a minimum number of external components to operate with a single
ended electrode type. This acquisition is designed around an analog I/O group which is
composed of four GPIOs (see
the acquisition of several capacitive sensing channels simultaneously and to support a
larger number of capacitive sensing channels. Within a same analog I/O group, the
acquisition of the capacitive sensing channels is sequential.
One of the GPIOs is dedicated to the sampling capacitor C
I/O per analog I/O group must be enabled at a time.

Figure 127. TSC block diagram

Figure 128). Several analog I/O groups are available to allow
DocID025202 Rev 7
Touch sensing controller (TSC)
Figure 127: TSC block
. Only one sampling capacitor
S
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