Date Code(s): 9815, 9818, 9819, 9825, 9827, 9829, 9830, 9837, 9838, 9841, 9843, 9844, 9848: In Turbo mode, if the Prescaler is not assigned to the RTCC, the RTCC will not sense any external events. If the Prescaler is assigned to the RTCC, the RTCC works as an external event counter. With the Prescaler assigned to the WDT (Watchdog Timer), the RTCC will only function as an internal timer clocked internally and will ignore any external events.