Zero, Preface
Beginners often start learning microcontroller 51 surprised a moment, said 51 single-chip ah, Zage model is AT89C52, the S52 is Editor's Note? Go to school with the most muddle so, but I never did understand the whole, so today we'll be thoroughly understand these "51" are some of what 51. Finally, I also prepared a manual comparison of each model, we can cross-reference.
A 8031 instruction set
51 microcontroller is a general term, we will call all 51 single-chip Intel 8031-compatible instruction set, so it is AT89C51, AT89S52, AT80C51, TS83C25 and so on, no matter what his name are collectively referred to as 51 single. That why it is not called microcontroller 31? Intel launched the first year when the number is 8031 microcontroller series (so called 8031 instruction set), then make small changes called 8032,8033 on its basis, the big change is called 8041,8051, just upgrade to 8051 when Intel the 8051 data released to other manufacturers to encourage everyone to play together, so now all the other manufacturers are based on 51 single-chip secondary development of 8051 (8031 instruction set is used naturally), then we'll all use the 8031 instruction set , 8051 based on the production of other microcontroller 51 referred to as microcontroller.
Two, C51 and C52
ATMEL 51 MCU production of many types, the most classic of nature is AT89C51, but it's only ROM 4K, RAM only 128Byte, wanted to write a few lines of code how to do? Naturally rise briefly Well stages, so the ROM and RAM space is doubling the AT89C52 (ROM 8K, RAM 258Byte).
Three, C51 and S51
AT89C51 AT89S51 is a comprehensive upgrade, in addition to the use of newer technology, higher frequency, more the number of programming, but also increased the ISP, watchdog, asynchronous serial port, so the market is still the most used instead of C51 S51 .
Fourth, many times not erase the 87 series
Our minds are generally 51 single for multiple rewritable (repeated burning program), but you can program (OTP) in many business scenarios only need to write, so naturally ATMEL launched only once recordable version such AT87F51, AT87C5103, TS87251, etc., are characterized by naming a 87.
Five, L, LV, LS, LP
In addition to common C51, S51, C52, S52, and sometimes we can see a lot of L, LV, LS, LP, such as AT89LS52, AT89LV51, etc., the actual meaning is as follows:
1) L: Low-power low-voltage representative of
2) LV: low voltage representative of
3) LS / LP: stands for Enhanced core in low power low voltage (L) on the basis of the product
VI Summary
In addition to the above features, the chip model also contains a lot of information, usually veteran to see a long string of characters probably will be able to know the characteristics of the chip, if you want to know more can follow the public number "programmer hair loss prevention center" Reply " A51 " obtain the following information:
1, ATMEL 51 MCU common model performance table
2, ATMEL 51 MCU naming rules
Follow-up will continue to add more learning materials, so stay tuned " programmer hair loss prevention center "!
