c51s51区别（C51s51 difference）.docVIP

c51s51区别（C51s51 difference） Many beginners 51 SCM users will have such a question: what is AT89S51, the book and the network can be 8051, 89C51 and so on! Havent you heard of 89S51? Here, a product for beginners to clarify the concept of practical use of MCU, MCS-51 microcontroller is the INTE company in 1980 launched the product, the typical products are 8031 (no internal program memory, the actual use has been out of the market), 8051 (HMOS, chip mining power is 630mW, is 5 times the actual 89C51 use has been out of the market) and 8751 generic products, until now, the MCS-51 kernel series compatible MCU application is still the mainstream products (such as the popular 89S51, 89C51 has been discontinued), all colleges and universities and professional schools are training materials and MCS-51 MCU as the representative of the theoretical basis of learning. Some literature even refers to the 8051 series MCS-51 microcontroller, 8051 is the most typical representative of the early, since the MCS-51 far-reaching impact, many companies have launched a series of compatible microcontroller, is the kernel of MCS-51 actually has become a standard 8 bit microcontroller. Other companies 51 single-chip products are compatible with the MCS-51 kernel products, and to. As a program running in various microcontroller hardware manufacturers on the results are the same, such as ATMEL (89C51, 89S51, PHILIPS has been discontinued) (Philip), and WINBOND (Hua Bang), we often say that the discontinued 89C51 refers to ATMELs AT89C51 microcontroller, is also in on the basis of the original has many characteristics, such as clock, the better is by Flash (the contents of the program memory can be rewritten at least 1000 times) memory with the original ROM (write once), the performance of the AT89C51 relative to the 8051 is very superior. But in the market, 89C51 by the PIC microcontroller camp challenge, 89C51 most fatal flaw is that does not support the ISP (online update) function, must ad