With regards to the RL78/G23 evaluation board, Renesas provides two types: Arduino compatible FPB and RSSK specialized for touch solutions. There are two types of FPB, the 64-pin version and the 128-pin version. The features are the same, including built-in Arduino and Grove interfaces, through-hole that provides access to all MCU pins, Debug/Programmable with USB cable only, and an affordable price. The RSSK is an evaluation board specializing in touch solutions. It evaluates various touch functions (button, slider, wheel, matrix key, proximity sensor), simple prototyping, and it is used as a reference when designing boards or software.