Fully CMOS static design
4-bit data bus
On chip EPROM size : 0.5 K words
Internal RAM size : 30 nibbles
(24 general purpose registers, 6 special
registers)
24 single word instructions
11-bit instructions
2-level stacks
Operating voltage : 2.5 V ~ 5.5 V
Internal RC oscillator : 4MHz / 8MHz
Power-on Reset

 Sleep Mode for power saving
oscillator start-up time : 20ms
8 bit real time clock/counter(RTCC) with 8-bit
programmable prescaler
On-chip RC oscillator based Watchdog
Timer(WDT)
Wake-up from sleep on pin change