GENERAL DESCRIPTION
On chip memory system includes 2.0 K bytes of ROM, and 80 bytes of static RAM. 2. FEATURES
The followings are some of the features on the hardware and software : ! Fully COMS static design ! 8-bit data bus ! On chip ROM size : 2 K words ! Internal RAM size : 80 bytes (72 general purpose, 8 special registers) ! 36 single word instructions ! 14-bit instructions ! 2-level stacks ! Operating voltage : 2.3 V ~ 6.3 V ! Operating frequency : 0 ~ 20 MHz ! The most fast execution time is 200 ns under 20 MHz in all single cycle instructions except the branch instruction. ! Addressing modes include direct, indirect and relative addressing modes ! Power-on Reset ! Power Edge-detector Reset ! Sleep mode for power saving ! 4 oscillator start-up time : 150 µs, 20 ms, 40 ms, 80 ms ! 8-bit real time clock/counter(RTCC) with 8-bit programmable prescaler ! 4 types of oscillator can be selected by code options : RC Low cost RC oscillator LFXT Low frequency crystal oscillator XTAL Standard crystal oscillator HFXT High frequency crystal oscillator !
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