DocID17613 Rev 3

5/15

AN3236

Adding an extra touchkey

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1

Adding an extra touchkey

This section explains how to add an extra touchkey to a pair of single electrodes for an

application.

1.1

Basic hardware implementation

As shown in Figure 1: Basic hardware implementation example, a standard touchkey is

made of a single ended electrode. Two single electrodes can generate a third touchkey by

interlacing teeth coming from each electrode.

Figure 1. Basic hardware implementation example