˙Only 47 single word instructions ˙5-level deep hardware stack ˙4K x 13 bits on chip EPROM/ROM ˙144 x 8 bits on chip general purpose registers (SRAM) ˙8-bit real time clock/counter with 8-bit programmable prescaler ˙On chip Watchdog Timer (WDT) with internal oscillator for reliable operation and soft-ware watch-dog enable/disable control ˙3 I/O ports with independent direction control ˙16 soft-ware control pull-high ˙8 soft-ware control pull-down ˙2 soft-ware control open-drain ˙1 internal interrupt source; 2 external interrupt source ˙Wake-up from SLEEP mode
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