The teardown of the Galaxy S5 Mini identifies that the Cypress TMA545 controller drives the touchscreen and notes that the Cypress controller replaced competing controllers used in the design of the previous Galaxy S4 Mini and S3 Mini smartphones.
The Galaxy S5 Mini, says Cypress, takes advantage of advanced features of the Gen5 solution, including gloved-finger tracking and “hover” functionality. Gen5 delivers accurate navigation of touchscreens even through thick gloves. It tracks up to 10 fingers in thin gloves and two fingers with thicker fabric, such as ski gloves. The hover feature enables the Galaxy S5 Mini to anticipate the touch of a finger and enlarge content such as points on a map or the font of tiny website links to make them easier to find and select.
“This design win is another indication of the strong momentum that our TrueTouch Gen5 touchscreen controller family is generating....” said Hassane El-Khoury, executive vice president of Cypress's Programmable Systems Division, “... [with its] combination of top sensitivity, noise immunity and advanced features, such as support for glove touch, hover and waterproofing.”
Teardown.com’s Product Manager Stacy Wegner attributes the design win to Cypress addressing an increasing trend in providing a better touch interaction across multiple environmental variables.
With Cypress’s DualSense technology to execute both self-capacitance and mutual-capacitance measurements in the same device, the Gen5 family offers optimal waterproofing for seamless performance in real-world conditions, including the presence of rain, condensation, or sweat. By combining this architecture with a32-bit ARM Cortex M-Core processor, Gen5 controllers offer 120-Hz refresh rates and low power consumption. Gen5 controllers drive the touchscreen at 10V and at high frequency with narrow-band, single-pass scanning and advanced hardware DSP filtering.
Electronic noise from displays and after-market chargers can disrupt a touchscreen’s ability to operate properly. The TrueTouch Gen5 family’s ChargerArmor feature delivers 40 Volt peak-to-peak (Vpp) charger noise immunity measured from 1 to 500 kHz with an ultra-thin 0.5-mm cover lens