Both Stm32 MCU and Renesas MCU have been used. For developers, the MCU itself is actually a program written in C language. From the program itself, they should be the same, but the resources of the MCU and the development environment for writing the program are different.
When most engineers are working on a project, they will choose the appropriate chip according to the needs of the project. Choosing stm32 or Renesas single-chip microcomputer means that they can meet the requirements of the project.
Of course, there are more engineers using stm32 microcontrollers than Renesas engineers, and there will be more reference codes and information on the Internet. STM32 can use keil and iar development environments. When using Renesas a few years ago, Renesas itself was used. The compiler, relatively speaking, is not as familiar and easy to use as Keil. Later, I heard that there was an upgrade, but now I don’t know the specific situation.
The only thing about single-chip microcomputer is whether it is suitable for the current application.

Now the functions of the same type of single-chip microcomputers (such as the same 8-bit single-chip microcomputer and the same cortex m3 single-chip microcomputer) are not very different. Different single-chip microcomputers have different focuses, and there may be more or less functional modules, but This will not affect the overall performance of the microcontroller.

Briefly talk about the selection of single-chip microcomputer.

1. Choose MCU according to development cost

In product development, the first place is always the development cost. No company will tell developers not to care about the cost. On the contrary, the company will always ask for cost reduction as much as possible, so when selecting the microcontroller, it must meet the requirements. Under the premise of, you can choose which MCU is the most suitable for the price. (Not necessarily the cheapest MCU)

2. Choose MCU according to familiarity

No matter what we are doing, we always hope to start from the most familiar place. There are many advantages of this. The most important point is that it can speed up the progress and reduce the difficulty. Therefore, for a single-chip project, if there are several types of single-chips, it can be satisfied. If required, we will definitely choose the most familiar kind of MCU for development. This will not only quickly enter the development state, speed up the development progress, reduce the difficulty of development, and more importantly, it can reduce various intractable diseases in the development process.

3.select the single-chip microcomputer according to the capacity of the program memory and the data memory

As the saying goes, you have to do everything within your power. The same is true for the selection of single-chip microcomputers. For example, for a single-chip microcomputer project, you need 10K program space, but the program memory of the single-chip microcomputer selected during the selection is only 8K. Then in the later stage of development, you must be sure I will worry about the lack of program space. Maybe you will say that I can optimize the program and compress the 10K capacity to 8K. This is of course a solution. However, when the cost allows, why not choose a program What about a microcontroller with more space? (The same is true for the data memory of the microcontroller)

4. select the single-chip microcomputer according to the peripheral function module

Now the single-chip microcomputer has very powerful functions, such as serial port, IIC, SPI, PWM, timer, USB, and even some single-chip microcomputers integrate the interface of smart card. Of course, the more powerful the single-chip microcomputer should be good to use, especially the later expansion is convenient, but it is more important to understand that the more powerful the single-chip microcomputer, its price will be very powerful, so the functional modules of the single-chip microcomputer are enough. Well, of course, if you consider the later expansion, you can choose a more powerful single-chip microcomputer.

5.choose the single-chip microcomputer according to the working environment

Different single-chip microcomputers have different operating environments. Some are suitable for working in normal temperature environment, some are suitable for working in high temperature and extremely low temperature conditions, and some have good anti-interference ability, etc., which should also be considered when selecting the model.

6.choose the single-chip microcomputer according to the power consumption

Nowadays, many electronic products are powered by batteries. In this case, power consumption must be considered.