| | | features | | download | ˙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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