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51 Will the MCU be eliminated

We are in an era of rapid development, but the 51 MCU has appeared in our life for a long

time.But so far, it is still active in various applications.

With the recent chip panic, STM series prices increased nearly 10 times, the delivery date is

also far away.Other big factories also doubled several  times, goods up to dozens of weeks.In

addition, bad businesses speculation behavior is a core is hard to find.In order to meet the

company’s  production needs, some enterprises have to change their strategy to focus on 51 single

chip computer, when some people will think that the   opportunity of 51 single chip computer has arrived.

 But is it really true?

 Everyone in the ARM kernel 32-bit single chip computer is extremely out of stock when we

still have 51 single chip computer to use, but you go to   consult those 51 single chip computer

manufacturers get the reply is still two words: “no stock”.

 At this time you will think I am not late, not a friend, with 51 single chip computer place


  Down to some small home appliances with very simple functions, up to some electric car

controllers.Many of the electronic products that we are  familiar with basically have 51 single-chip

machines.There are also some 51 MCCM that can meet the requirements of industrial control are

also  rushed in the first line of the industrial field.

 51 Single-chip microcomputer from the original hundreds of K main frequency to the

current 30 M, the performance can be said to be greatly improved.The Peripherals are even more

very rich.IIC, SPI, UART, timer, ADC, and more.And the price is also very cheap.

 It’s hard to deal with some complicated arithmetic operations because it doesn’t have a

special hardware multiplication and division er.It complex likely to take multiple clock cycles.The

51 MCU can really deal with most of the work without complex operations.

  Although 51 has a wide range of applications, he also has its own weaknesses, such as the

insufficient computing power mentioned above.And the low instruction set execution efficiency

and other problems, forcing the application scope of 51 SCM is also shrinking.To some electronics

with simple control functions and lower costs.

  With the development of ARM cores, some high-performance 32-bit machines are also

moving towards high cost performance, recently facing a  RA2E1 series R7FA2E1A52DFJ, which

uses the latest M23 kernel.


  In addition to UART, IIC, SPI, timer, ADC and other basic functions, it also has a capacitive

touch button channel.If the user has a touch button requirement, they can directly use the touch

button function on the chip, and do not need to add another touch chip.

 Its internal 4K DATA_FLASH can save a EEPROM to store the data that the user needs to

save.In addition, the power supply range of this chip is also very wide between 1.6-5.5V, which

saves a lot of the trouble of electric frequency conversion.It can run between 3.3V and 5V levels, no

longer worry about frequency mismatch.

 In fact, there is no good or bad in the selection of single-chip computer, only suitable or not

suitable.A project only switch function in plus a few atmosphere lights but finally chose an ARM

core of the 32-bit single chip computer this is obviously not appropriate.

 Then a handheld detection instrument needs to read back the data from the sensor and

make complex calculations and finally display it on the LCD screen, but finally choose a 51 microU,

which finally gets the user’s hand for 30 seconds, which is obviously a very bad experience.So the

right single microchip computer is the best.

 For another STM32F103 example, the F103 series comes with a CAN bus and USB

features.However, it is not normal to use these two functions, so we can choose more suitable ones,

such as F030 or Renesas’s RA2E1 series, which both saves the cost and has more choices.