Cypress CapSense CY8CMBR2044, Design Manual

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CapSense Schematic Design
AN66308 - CY8CMBR2044 CapSense® Design Guide, Doc. No. 001-66308 Rev. *F 17
Figure 3-3. Example of Toggle ON/OFF Feature
CS0
GPO0
Flanking Sensor Suppression (FSS)
FSS helps to distinguish closely spaced buttons by allowing only one CSx to be in the TOUCH state at a time. If a
finger contacts multiple CSx buttons, only the first one to sense a TOUCH state will turn ON.
FSS also is useful when a button can produce opposite effects
– for example, an interface with two buttons for
brightness control (UP or DOWN).
FSS configuration is defined in Table 3-2 and shown in Figure 3-4 and Figure 3-5 .
Figure 3-4. FSS Implementation, Single Button Touched