A multi-core architecture of digital back-end for large mutual capacitance touch sensing systems

In this paper, a multi-core architecture suitable for digital back-end processing for medium size or large size mutual capacitance touch sensing systems is proposed. The proposed architecture achieves both high efficiency and flexibility by combining software on CPUs with dedicated circuits for heavy computation tasks, which can realize digital back-end for 10–100 inch touch sensors with the unified architecture. Two ASICs and an FPGA have been implemented and the ASICs are under mass production.