Evaluation kit simplifies certified touch-key designs

Smartphone technology has become commonplace with the general public, and customers expect similar performance and touch-screen interaction features with all of their electronic devices. Supporting the certification of the human interface portion of embedded design, Renesas Electronics America announced a new capacitive touch evaluation kit. The kit is based on Renesas’ R8C/3xT-A MCUs that feature a specialized hardware block called the Touch Sensor Control Unit (SCU), which handles touch scanning and processing functions completely independent from the CPU.

The evaluation kit is certified by TÜV Rheinland, a multinational testing facility, to pass the IEC/EN 61000-4-6 standard, which defines compliance to RF-based conducted noise immunity. The system was designed to pass up to 15 V noise injection level over the full frequency range of 150 KHz to 230 MHz for all keys. The touch kit enables engineers to evaluate keypad, slide, and wheel configurations (including a 3 x 4 keypad) for touch sensitivity and noise performance on a single-board system.