AI 生成的摘要: The RL78/F13, F14, and F15 MCUs include multiple safety functions to detect errors and failures through built-in self-test features. These functions include high-speed and general-purpose CRC operations for flash memory and data checking, RAM ECC for error correction, CPU stack pointer monitoring, clock monitoring, RAM and SFR guards, invalid memory access detection, frequency detection, A/D converter self-test, and MO port output level detection. The high-speed CRC operation halts the CPU to verify the entire flash memory integrity using CRC-16-CCITT polynomial, with processing times varying by memory size. Specific registers control and store CRC operation results.