Asymmetric multi-row touch panel scanning

Control circuitry for a touch panel, the control circuitry comprising:

• a touch panel interface;
• a memory comprising scanning logic and a scan map, the scan map specifying a first step scan and a second step scan;
• and
• a controller in communication with the memory and the touch panel interface, the controller operable, when the scanning logic is executed, to:
• determine a first orthogonal waveform for the first step scan;
• determine a second orthogonal waveform for the second step scan, the second orthogonal waveform orthogonal in content to the first orthogonal waveform;
• and
• asymmetrically scan the touch panel in a region of interest through the touch panel interface according to the scan map, the asymmetric scan including the first and second step scans.

A product comprising:

• a non-transitory machine readable medium;
• and
• instructions stored on the medium that when executed by a system, cause the system to:
• retrieve a scan map for a touch panel, the scan map defining a first step scan and a second step scan;
• determine a first orthogonal signal to drive the touch panel during the first step scan;
• determine a second orthogonal signal to drive the touch panel during the second step scan, the first orthogonal signal orthogonal in content to the second orthogonal signal;
• and
• asymmetrically scan the touch panel in a region of interest according to the first and second step scans and the first and second orthogonal signals.