RL78/F15 Microcontrollers Renesas Electronics RL78/F15 Microcontrollers feature enhanced CAN / LIN / IEBus and memory lineup designed for automotive applications. The RL78/F15 Microcontrollers feature high processing performance while delivering the lowest power consumption. The RL78/F15 offers a high-speed on-chip oscillator that provides 32MHz CPU operation and an enhanced motor control functionality by the motor control timer (Timer RD). The RL78/F15 supports 125°C (target) operation, whereby a CPU clock of 24MHz can be reached.