HMI Applications―Part 3-2: RX113 MCU with Built-in Touch-Key IP

Solutions: 16 of 20

New MCU of RX113 with built-in touch-key IP: Use touch keys even through gloves or with wet hands

The new RX113 MCU incorporates new-generation touch-key technology that works even when used with thick or curved panels, or when pressed with wet or gloved hands. This low-power MCU is an all-in-one solution delivering all of the peripheral capabilities required for advanced touch-key systems. The RX113 comes with a full development environment and robust support, enabling our customers to quickly incorporate touch-key features into their embedded devices.

All-In-One Low-Power MCU Including Peripherals

The RX113 not only delivers high-level touch-key capabilities, but does so in a low-power high-performance package designed to meet growing demands from embedded designers—in areas such as household appliances and healthcare equipment—for a greater range of design choices, low-power operation, and smaller sizes. Because touch-key implementations have typically required the use of multiple MCUs or ICs, designers have been hesitant to embrace this technology. The RX113 makes it possible for these designers to implement touch-key systems with just a single low-power chip.

The new-generation RX113 is a member of the RX Family of high-performance 32-bit MCUs. It offers the lowest power consumption in the family: only 0.1 mA/MHz (typical) when running, just 1.6 µA in low-power mode with the LCD on (internal pull-up, 1/3 bias), and a mere 0.44 µA in low-power mode with the LCD off (with RAM maintained). These figures put the RX113 at the top of its class within the industry.

This one-chip solution can deliver a full, robust touch-key system. Its LCD drivers, other peripherals, and memory capacity have been optimized to implement not just an operating section, but also a system display section and a system control section (see Figure 1). Resulting systems occupy only about 1/3 the area, and consume only about half the power, of conventional multichip implementations. Consequently, customers can anticipate a significant drop in BOM costs. The RX113 MCU group will be available in 12 different models, varying in pin counts and internal memory capacity. Mass production is scheduled to commence in February 2015.

Figure 1: RX113 Features

Figure 1: RX113 Features

Renesas Advanced Development and Support Can Reduce Your Time-To-Market

Development of touch-key systems requires elaborate design work, with careful attention to electrode size, wiring, panel thickness, materials, and other implementation issues. Renesas has continued to help speed up this process by furnishing useful application notes, and by providing development tools to facilitate sensitivity adjustments. Now, with the release of the RX113, we are also offering enhanced development tools designed specifically for this MCU. Where touch-sensor sensitivity adjustment previously required use of external parts, it can now be conducted automatically from within the touch-key development environment. These tools also support easy, GUI-based program coding, allowing for a significant reduction in labor time and development periods.

Within the industry, prospective touch-key implementers are expressing growing demand for greater design freedom, a wider range of usage methods, and operability in a more varied range of environments. Our new RX113, together with our robust development environment and system, is intended to meet these needs. We invite our customers and prospective customers to try our samples and consider the potential for touch-key implementations. We are convinced that these implementations can add true value to your products.

New Touch-Key Technology Enables Freer Design Visit our ideas for RX113-based Embedded Devices!

Recommended for those who wish to review detailed specifications and features.