6 Functional Description

Microchip’s MXG3141 configurable controller uses up to five E-field receiving electrodes. Featuring a Signal Processing Unit (SPU), a wide range of 3D gesture applications are being preprocessed on the device, which allows short development cycles as no host processing is needed.

The MXG3141 offers one enhanced I²C interface and a dedicated Transfer Status line (TS) for data exchange with a host controller. GestIC sensing electrodes are driven by a low-voltage signal with a frequency in the range of 100 kHz, which allows their electrical conductive structure to be made up of any low-cost material. Even the reuse of existing conductive structures, such as a display’s ITO coating, is feasible. Overall, this makes the MXG3141 a very cost-effective system solution.

The following block diagram provides an overview of the main building blocks of MXG3141. These blocks will be described in the following sections.