What is the classification of USART and hardware connections in practical applications?

What is the classification of USART and hardware connections in practical applications? in view of this problem, this article introduces the corresponding analysis and solutions in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

1) between two single-chip computers, the power supply is 3.3V or 5V.

The sending end and the receiving end are connected.

2) single-chip microcomputer and notebook computer (no UART interface)

The computer should be equipped with "USB-TTL serial port" adapter.

3) single-chip microcomputer and desktop computer (chassis comes with UART interface)

Computer comes with UART interface level in line with the RS232 standard, + /-15V, can not be directly connected to the single-chip microcomputer. To use a level converter chip:

RS232 to 5V-max232 chip

RS232 to 3.5V-max3232 chip

4) the configuration link between single-chip microcomputer and RS485 interface.

The core chip max485 at the end of the single chip is used to convert the UART level to the differential level.

5V to max458 chip voltage

5.5V turn-max485 chip level

Note: this is a half-duplex communication with a distance of more than 1000m.

This is the answer to the question about the classification of USART and hardware connections in practical applications. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel for more related knowledge.