The block diagrams here breakdown the 52-pin devices. The R8C/24-25 was the first device introduced under the R8C/2x series. These devices have been widely adopted in a vast number of applications such as home appliances, building automation, and industrial control. The R8C/35x is considered the high-end version of the 52-pin offering, and includes added features such as Timer RC, comparators, DAC, and additional serial interfaces.