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What are the models of 5 1 single chip microcomputer?

AT89C5 1,STC89C5 1 .

1, AT89C5 1: built-in 4KB flash memory, programmable flash memory, including multiple input/output interfaces, timers and serial ports. It is a low-power microcontroller which is widely used in various embedded systems and control applications.

2.STC89C5 1: It has 8KB flash memory, 256 bytes RAM, multiple timers and serial port functions, and is suitable for industrial control, automotive electronics and other fields.