40.4 Signal Description
| Name | Type | Description |
|---|---|---|
| Y[m:0] | Analog | Y-line (Input/Output) |
| X[n:0] | Digital | X-line (Output) |
Note: The number of X- and Y-lines are device
dependent. Refer to Configuration Summary for details.
Refer to the Pinout for details on the pin mapping for this peripheral. One signal can be mapped on several pins.
The I/O lines used for analog X-lines and Y-lines must be connected to external capacitive touch sensor electrodes. External components are not required for normal operation. However, to improve the EMC performance, a series resistor can be used on X-lines and Y-lines. This improvement needs to be balanced with the implied longer response time due to higher RC load.