Touchscreen controller enables smartphone easy-wake gesture

The nubia Z7 Max includes a 5.5” full HD touchscreen with robust water tolerance driven by the TMA568 controller. The controller brings accurate gloved finger tracking to the phone and the ability to automatically switch between glove and finger tracking without requiring the user to change the phone’s settings. Additionally, TrueTouch controllers provide immunity to electrical noise from chargers and displays, delivering reliable touch input in real-world environments where competing solutions experience false and missed touches.

Electronic noise from displays and after-market chargers can disrupt a touchscreen’s ability to operate properly. Cypress’s Charger Armor feature delivers 40Vpp charger noise immunity measured from 1 to 500kHz with an thin 0.5mm cover lens and a finger-size of up to 22mm. According to the company, no competing controllers deliver noise immunity over 15Vpp under these conditions.

With Cypress’s patented DualSense technology to execute both self-capacitance and mutual-capacitance measurements in the same device, TrueTouch controllers offer the industry’s best waterproofing for seamless performance in real-world conditions, including the presence of rain, condensation, or sweat. By combining this architecture with a 32-bit ARM Cortex M-Core processor that is known for high-efficiency MIPS/mW, TrueTouch controllers boast 120Hz refresh rates and low power consumption. The controllers drive the touchscreen at 10V and at high frequency with narrow-band, single-pass scanning and advanced hardware DSP filtering.