• Scan 1 to 37 capacitive sensors
• Sensing possible with up to a 15 mm glass overlay
• Proximity detection to 20 cm with a wire-based sensor
• High immunity to AC mains noise, EMC noise, and power supply voltage changes
• Supports different combinations of independent and slide capacitive sensors
• Double slide sensor physical resolution using diplexing
• Increase slide sensor resolution using interpolation
• Touchpad support with two slide sensors
• Sensing support through high resistive conductive materials (ITO films for example)
• Shield electrode support for reliable operation in the presence of water film or droplets
• Guided sensor and pin assignments using the CSD2x Wizard
• Integrated baseline update algorithm for handling temperature, humidity, and electrostatic discharge (ESD) events
• Easily adjustable operational parameters
• PC GUI application support for raw data monitoring and parameter optimization in real-time
   

The CSD2x User Module (Capacitive Sensing using a Sigma-Delta Modulator) gives capacitance sensing using the switched capacitor technique with a sigma-delta modulator to convert the sensing switched capacitor current to digital code. The CSD2x User Module can support single-channel CapSense scanning and dual-channel CapSense scanning.

• The 8-bit general purpose counter uses one PSoC block
• Source clock rates up to 48 MHz
• Automatic reload of period on terminal count
• Programmable pulse width
• Input enables/disables continuous counter operation
• Interrupt option on compare output or terminal count
   

The 8-Bit Counter User Module provides a down counter with a programmable period and pulse width. The clock and enable signals can be selected from any system time base or external source. Once started, the counter operates continuously and reloads its internal value from the period register upon reaching terminal count. During each clock cycle, the counter compares the current count to the value stored in the compare register. Each clock cycle, the Counter tests the count against the value of the compare register for either a “less than" or “less than or equal to" condition. The comparator output provides a logic level that may be routed to pins and to other user modules. Most PSoC device families also permit the terminal count output to be routed in the same manner.