˙8-bit real time clock/counter (Timer0) with 8-bit programmable prescaler˙On chip Watchdog Timer (WDT) with internal oscillator for reliable operation and soft-ware watch-dog enable/disable control˙2 I/O ports with independent direction control (maximum 16 I/O pins)˙Soft-ware I/O pull-high/pull-down or open-drain control˙1 internal interrupt source; 2 external interrupt source˙Wake-up from SLEEP mode˙Built-in 8MHz, 4MHz, 1MHz, and 455KHz internal RC oscillator
