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The followings are some of the features on the hardware and software : Fully CMOS static design 8-bit data bus On chip ROM size : 1K words Internal RAM size : 32 bytes (25 general purpose registers, 7 special registers) 36 single word instructions 14-bit instructions 2-level stacks Operating voltage : 2.3V ~ 6.0 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 instructions Addressing modes include direct, indirect and relative addressing modes