1, knowledge is nothing more than basic electronic knowledge such as digital and analog electricity and circuits, and what matters is experience. Summarize what you usually do, write it down and watch it often; You should also be very familiar with common components, and just do a few more related project estimates. Although the theory is good at ordinary times, there is still a gap in practical application. Sometimes when doing experiments, it is possible in theory, but not necessarily in practice, and it is also related to components.

2,51is the most basic. You can use it if you are skilled, but sometimes it is not enough. Sometimes there are too many programs, and the memory may not be enough. We have encountered similar problems.

The key point is that this year's competition put forward a small system, cost-effective, low power consumption, which is not conducive to 5 1. ordinary

1)5 1 outputs 5V, while Sunplus MCU can output 3.3V, and Sunplus MCU consumes less power;

2) Suppose the A/D is used in the competition, which is the most common. With the 5 1 expansion chip, Sunplus has integrated 10 bit A/D.. From the perspective of cost performance analysis, it is better to choose Sunplus MCU. The 16-bit Sunplus MCU also integrates D/A and voice module.

3) Small system: 6 1 board is classic and stable, and can be directly used in competitions.

4)6 1 debugging is more convenient, and single-step debugging can be realized. The common 5 1 is inconvenient, and it is unfavorable to write a program in such a short time.

It is suggested to choose Sunplus MCU, which was selected when our group participated in the 2007 competition.