[Big chip solution] A new interactive method in the post-epidemic era, WPG launches a no-dead-angle disinfection touch interface design solution based on NXP products

On June 7, 2021 , WPG Holdings, a leading semiconductor component distributor dedicated to the Asia Pacific market, announced

Its subsidiary World Peace launched a no-dead-angle disinfection touch interface design based on NXP’s (NXP) MKL16Z64VFT4 MCU.

Figure 1- A display board of the design of a no-dead-angle disinfection touch interface based on NXP products launched by WPG

In the post-epidemic era, people pay more and more attention to the cleaning and disinfection of objects. Taking the contact operation interface as an example, the operation interface of most devices adopts multi-curved buttons or membrane buttons. However, the multi-curved buttons are not easy to clean, and the membrane buttons require additional molds, which is costly and has a single button shape design.

The touch interface design scheme for disinfection without dead angles launched by WPG World Peace uses a mutual induction architecture to design the Touch Pad. The Touch Pad can be measured through the MCU touch sensor interface TSI without the need to mount an additional Touch Pad Driver IC. In terms of circuit board design, a circular plane or a multi-angle plane can be used, which is easy to clean and disinfect, and is easier to design in line with the product appearance.

Figure 2-Block diagram of the all-dead-angle disinfection touch interface design solution launched by WPG World Peace based on NXP products

The MKL16Z64VFT4 MCU in this solution uses the Arm Cortex-M0+ core and has a variety of flexible low-power modes, including a new computing mode that can reduce dynamic power consumption by putting peripherals in an asynchronous stop state. In terms of functional design, this solution can be extended and applied with the e-sports mouse and headset solutions developed by World Peace to customize the Touch Pad function. Taking the Headset as an example, the data scanned by the Touch Pad can be transmitted to peripheral devices through the I2C Port, thereby realizing functions such as song play/stop, song switching, and volume adjustment.

Figure 3- Customize Touch Pad function to play/stop songs

▌Core Technology Advantages

• Provide relevant software and hardware design for customers to develop quickly;

• Mainstream small ultra-low power microcontroller QFN 48pin;

• The touch panel can sense distance 0~10mm;

• The low-power hardware touch sensor interface TSI can measure the Touch Pad without the need to mount an additional Touch Pad Driver IC. You can use the functions of both MCU and Touch Pad Driver IC to develop products.

▌Solution Specifications

• The energy-saving architecture is optimized for low power consumption through 90nm TFS technology;

• The power consumption in ultra-low power operation mode is less than 40μA/MHz;

• With complete state retention and 4.5μs wake-up function, static power consumption is less than 2A;

• Cortex-M0+ processor, running at up to 48MHz;

• Memory options: 128KB Flash and 16KB RAM;

• Nine low-power modes are available for switching to improve MCU performance or reduce power consumption in corresponding applications;

• 4-channel DMA controller, supporting up to 63 request sources;

• Low-power hardware touch sensor interface (TSI);

• QFN32 (5x5mm), QFN48 (7x7mm), LQFP (10x10mm).