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S5 Mini packs Cypress' touchscreen controller

Posted: 18 Aug 2014 ?? ?Print Version ?Bookmark and Share

Keywords:TrueTouch? Gen5? Galaxy S4 Mini?

Cypress' TrueTouch Gen5 touchscreen controller drives the multi-touch display of the new Samsung Galaxy S5 Mini smartphone, TechInsight's reveals.

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 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, greatly improving user convenience. It tracks up to 10 fingers in thin gloves and two fingers with thicker gloves, such as those used by skiers. The solution's 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.

 Cypress TrueTouch Gen5 TMA545

This photo shows the Cypress TrueTouch Gen5 TMA545 touchscreen controller in a teardown of the Samsung Galaxy S5 Mini smartphone by TechInsights' (Photo courtesy of TechInsights)'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. "When we discovered the Cypress TrueTouch controller in the Samsung Galaxy S5 mini, we viewed it as validation of Samsung's commitment to bring advanced touch features across its line of products," said Wegner.

With Cypress's unique and patented DualSense technology to execute both self-capacitance and mutual-capacitance measurements in the same device, the Gen5 family offers the industry's best waterproofing for seamless performance in real-world conditions, including the presence of rain, condensation, or sweat. By combining this powerful architecture with a 32bit ARM Cortex M-Core processor that is known for high-efficiency MIPS/mW, Gen5 controllers boast 120Hz 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 unprecedented 40V peak-to-peak (Vpp) charger noise immunity measured from 1kHz to 500kHz with 0.5mm cover lens and a finger-size up to 22mmthe most stringent specifications used to measure any touchscreen controller. No competing controllers deliver noise immunity over 15Vpp under these conditions. The unique features of TrueTouch are backed by a portfolio of more than 100 capacitive touch sensing patents.

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