The limitation to Button widget mentioned in the CapSense component datasheet is for the number of sensors in a particular widget.
The PSoC 4L device supports a maximum of 68+22 = 90 sensors. You can achieve this by adding multiple widgets which can have more sensors.
Please note that in CSD0, if you require all 68 sensors, then the pins reserved for SWD (P3 and P3 for CY8C4248BZI-L489) must be changed to GPIO by going to the System tab in cydwr and changing Debug select to GPIO. Please refer to this link for more details on this: How to link PSoC 4000 SWD Debug pins P3/P3 to SDA/SCL of the I2C component from Cypress Component Catalogy?
The maximum number of sensors is also limited by the number of GPIO pins available. Please make sure to select a part with sufficient number of GPIO pins.
Thank you for your quick answer. I didn't understand about "Widget" for the button.
CapSense widgets consist of one or more CapSense sensors, which as a unit represent a certain type of user interface.
There are different types of widgets (Buttons, linear slider, proximity sensor etc). In the latest CapSense component (V6.0), widgets support multiple sensing elements. So, you can assign up-to 32 button sensors in a widget.
After this, another widget has to be added and this supports another 32 sensors.
Please refer to Getting started with CapSense document for more details.
Do let us know in case of any further clarifications.
I understand. Thank you so much.