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The 89 C51 minimum system commissioning.
Chip minimize system is a single chip can work properly the periphery of the main components, must be can be divided into the clock circuit and reset circuit, we use is AT89C51 chip, it bring their own internal 4 K FLASH program memory, usually, the 4 K storage space enough, so we will use our feet of fixed AT89C51 chip 31 by high level (PCB board has already meet dead), so we only inside the chip program memory 4 K.