Executable instructions for the M68HC12 processor are defined in the CPU Reference Manual (CPU12RM/AD) ( http://www.freescale.com/files/microcontrollers/doc/ ref_manual/CPU12RM.pdf). The instructions for the HCS12X processor are defined in the CPU Reference Manual (S12XCPUV1) ( http://www.freescale.com/files/ microcontrollers/doc/ref_manual/S12XCPUV1.pdf).