Strictly necessary cookies are on by default and cannot be turned off. Functional, Performance and Tracking/targeting/sharing cookies can be turned on below based on your preferences (this banner will remain available for you to accept cookies). You may change your cookie settings by deleting cookies from your browser. Then this banner will appear again. You can learn more details about cookies HERE.
Strictly necessary (always on)
Functional, Performance and Tracking/targeting/sharing (default off)
How does PSoC® 4 CapSense® sensor auto-reset work?
When a filtered raw count is calculated from noise filters, there are three cases for baseline update:
Case 1: The filtered raw count is lower than the negative noise threshold. In this case, the device executes the low baseline reset process. The baseline is not updated.
Case 2: The filtered raw count is in within the positive and negative noise threshold range. In this case, the device executes the baseline update process. The process is shown in Fig-1.
Case 3: The filtered raw count is higher than the positive noise threshold. In this case, if ‘Sensor auto reset’ is disabled, the baseline is not updated; if sensor auto-reset is enabled, the device executes the baseline update process. The process is shown in Fig-1.
Enabling sensor auto-reset limits the maximum duration for which the sensor stays ON (typically 5 to 10 seconds). This setting prevents the sensors from permanently turning ON when the raw count accidentally rises because of a large power supply voltage fluctuation, or a sudden change in noise conditions. Use this setting to avoid latch-up of sensors in high-noise conditions. In some cases, if you want to stretch the maximum time duration for sensor staying ON with sensor auto-reset enabled, modify the size of Baseline_Update_Buffer (default size is 8-bit). Contact Cypress sales or technical support for more information.