What are the steps of hardware circuit design of single chip microcomputer?

If you want to determine the chip connected to the single chip microcomputer, you must first look at what you want to do with it. If you collect signals, it depends on what kind of signals you collect. If you collect audio signals, you can choose some audio decoding chips, such as AD1836; . If you are collecting video signals, you should choose a video decoding chip, such as ADV7 17 1. In short, the corresponding chip should be selected according to the signal type of the front end, and the function of many sensors is to collect various external signals. After the chip is determined, the pin connection mainly depends on two aspects: first, the control interface, that is, the single chip microcomputer realizes the register setting of the chip through this interface and realizes various functions of the chip. Common control interfaces include serial control interface, some support SPI, and some support I2C；. . The second is the data communication interface, which is used for data transmission between the single chip microcomputer and the chip, and the collected data is sent to the single chip microcomputer through this interface, which has two interfaces: serial and parallel. Generally, there will be recommended circuits for pin connection in the chip manual, so you can refer to them.