I have MC9S08GB60A MCU with 32 khz crystal. I can make RTI running when the mcu is clocked using external crystal (and internal MCUs oscillator). My question is - how to make RTI running when MCU is clocked using internal reference generator (not using the external crystal)? I don't need my MCU to be clocked by any external component, internal clock is sufficient for me. But I want to use RTI (which needs external clock).