Use AT89S series single chip microcomputer to replace AT89C series single chip microcomputer

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Use AT89S series single chip microcomputer to replace AT89C series single chip microcomputer [Copy link]

Compared with the AT89C series microcontrollers, the AT89S series microcontrollers have added many new functions and have greatly improved performance. Since the AT89C series microcontrollers have been discontinued and are almost out of stock in the market, the price of the AT89S series microcontrollers is much lower than that of the AT89C series microcontrollers!

Compared with AT89C series microcontrollers, AT89S series microcontrollers have the following new functions:

- ISP online programming function. The advantage of this function is that the program in the microcontroller memory does not need to be removed from the working environment. It is a powerful and easy-to-use function.

- The maximum operating frequency is 33MHz. As we all know, the maximum operating frequency of the 89C series microcontroller is 24M, which means that the 89S series microcontroller has a higher operating frequency, thus having a faster computing speed.

- It has a duplex UART serial channel.

- The internal integrated watchdog timer no longer needs an external watchdog timer unit circuit like the 89C series microcontroller.

- Dual data indicators.

- Power off mark.

- A new encryption algorithm, which makes it impossible to decrypt the 89C series microcontroller, and the confidentiality of the program is greatly enhanced, so that intellectual property rights can be effectively protected from infringement.

- Compatibility: Fully compatible with all 51-word series products. For example, 8051, 89C51 and other early MCS-51 compatible products. That is to say, all the programs in textbooks and online tutorials (regardless of whether the microcontroller used in the textbook is 8051, 89C51, MCS-51, etc.) can run normally on 89S51. This is the so-called backward compatibility.