˙Only 49 instructions ˙Only 47 single word instructions ˙5-level deep hardware stack ˙4K x 13 bits on chip EPROM/ROM ˙140 x 8 bits on chip general purpose registers (SRAM) ˙1 8-bit real time clock/counter with 8-bit programmable prescaler ˙3 8-bit real time clock/counter with period setting ˙On chip Watchdog Timer (WDT) with internal oscillator for reliable operation and soft-ware watch-dog enable/disable control ˙4 I/O ports (38 I/O pins) with independent direction control ˙32 programmable pull-high input pins ˙12 wake-up pins ˙2 open-drain pins ˙2 R-option pins ˙Clock output with high driving ability ˙19 channels Resistor to Frequency Converter (RFC) output ˙2 channels Pulse Width Modulation (PWM) output ˙Built-in 8-bit data comparator ˙7 internal interrupt source; 1 external interrupt source ˙Wake-up from SLEEP mode ˙Built-in RC oscillator with external resistor
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