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C3001881_Network port to serial port solution verification board based on CH9120 chip

Overview

CH9120 has an internal integrated TCP/IP protocol stack, which can realize two-way transparent transmission of network data packets and serial port data. It has 4 working modes: TCP CLIENT, TCP SERVER, UDP CLIENT, and UDP SERVER. The serial port baud rate can support up to 921600bps. , which can be easily configured through the host computer software or serial port commands, which is convenient and fast. Supports 10M, full-duplex/half-duplex adaptive Ethernet interface, compatible with 802.3 protocol. In this solution, the CFGO pin is the serial port configuration mode setting pin with a built-in pull-up. If R8 is welded, the serial port configuration mode will be entered.

PS: The capacitor C5 in the picture is a redundant component and does not need to be connected. C5 can be short-circuited during use without affecting the use.

Design Files

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Update:2025-06-19 14:22:05

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