The MC9S08RD8CDWE-FR is an 8-bit microcontroller from NXP's S08 family, built around the S08 core running at 8 MHz. On-chip peripherals include a low-voltage detect (LVD), power-on reset (POR), PWM timer, and watchdog (WDT), plus a serial communications interface (SCI) for UART links.
The 8 MHz core clock sets the instruction throughput at roughly 8 MIPS for register-to-register operations. For a PWM update loop or a 9600-baud SCI poll, that's ample headroom — but if your application needs floating-point math or a real-time OS tick below 100 µs, the 1 KB RAM will be the tighter constraint than the clock. The internal oscillator saves an external crystal on the BOM, but its accuracy across temp means you lose precision for CAN or high-speed USB — neither of which this part targets anyway.
Sourced through our distribution network against an RFQ.