Capacitive touch pad configured for proximity detection

A device, comprising:

• a touch detection panel, the panel including:
• a first plurality of elongated electrodes;
• and
• a second plurality of elongated electrodes transverse to the first plurality of electrodes;
• control circuitry coupled to the first and second pluralities of electrodes, the control circuitry including:
• a first set of ports coupled to the first plurality of electrodes;
• a second set of ports coupled to the second plurality of electrodes;
• and
• a first sampling capacitor having a first terminal coupled to each of the first set of ports and a second terminal coupled to each of the second set of ports.

A method, comprising:

• controlling a first plurality of elongated electrodes and a second plurality of elongated electrodes, the first plurality of electrodes being transverse to the second plurality of electrodes such that each one of the first plurality of electrodes overlaps each one of the second plurality of electrodes, the controlling including:
• performing an object location routine, the performing of the object location mode including:
• activating a first one of the first plurality of electrodes and a second one of the second plurality of electrodes;
• determining a first capacitance between the first one of the first plurality of electrodes and the second one of the second plurality of electrodes;
• comparing the first capacitance with a first detection threshold;
• and
• performing a proximity detection routine, the performing of the proximity detection mode including:
• activating the first one of the first plurality of electrodes and a second one of the first plurality of electrodes, the first one being separated from the second one by at least one of the first plurality of electrodes;
• determining a second capacitance between the first one of the first plurality of electrodes and the second one of the first plurality of electrodes;
• comparing the second capacitance with a second detection threshold.