What is the Capacitive Touch and Host Controller function? What does it do? Industrial design is evolving faster than ever to deliver beautiful and reliable Human Machine Interfaces (HMIs), especially in appliances and building security in the system. Mechanical buttons and knobs are giving way to capacitive touch, and Texas Instruments’ CapTIvate™ capacitive touch-sensing microcontrollers (MCUs) are leading this user experience revolution.
The new MSP430FR2675 and MSP430FR2676 devices will help expand your designs with capacitive touch while saving time, board space and cost savings. Here’s a quick overview of the benefits of CapTIvate, specifically for these two new devices:
Ease of use: With an extensive set of tools and resources, you can save time and launch products faster – start your designs in less than 5 minutes.
Versatility: Offers design flexibility with full configurability, including self-capacitance and mutual-capacitance sensors and a comprehensive library of controls for buttons, sliders, wheels, and proximity sensing.
Lowest Power: Touch is automatically detected without CPU intervention, ensuring long battery life.
Robustness and reliability: IEC and IPX certified anti-conducted noise and waterproof solution to avoid false touch detection and achieve superior reliability.
Figure 1 – MSP430FR267x Microcontroller Block Diagram
As shown in Figure 1, the MSP430FR2675 and MSP430FR2676 offer 32KB and 64KB of nonvolatile memory, giving you more code space to run application code or store/log data. Higher pin-count packages, including 32-pin VQFN, 40-pin LQFP, and 48-pin LQFP, provide sufficient serial communication ports and GPIO to interface with other system components. If you want to interface with analog sensors, the integrated 12-bit ADC can meet your needs. Why rely on a two-chip (host microcontroller + discrete capacitive touch microcontroller) solution? Designers can save on BOM costs with a CapTIvate™ capacitive touch sensing microcontroller single-chip solution and board space.
These devices are certified for extended temperature ranges up to 105°C – a key requirement for designers in appliance applications. Additionally, Captivate IP automates multiple anti-noise post-processing techniques, such as multi-frequency sweeping and oversampling, for more robust capacitive touch. With this combination of features, the MSP430FR2675 and MSP430FR2676 can act as the main system controller in your application!
Portfolio Scalability and Ecosystem
Figure 2 – CapTIvate MCU portfolio
Project requirements may change over time, and flexibility may be required to add or remove features along the way. If you want your design to be platform specific, you need an MCU family that meets your requirements.
With the introduction of the MSP430FR2633 and MSP430FR2675 and MSP430FR2676, CapTIvate now offers pin-compatible solutions for 16KB, 32KB and 64KB microcontrollers in a 32-pin Quad Flat No-Lead (QFN) package (see Figure 2), so even if required Constantly changing, you also don’t need to redesign from scratch.
Discover how these new devices can revolutionize your HMI by pushing the limits of capacitive touch and acting as the main system microcontroller. Shop now for samples of the MSP430FR2675 and MSP430FR2676 microcontrollers. The above is the function analysis of capacitive touch and host controller, I hope it can help you.