The CH382 is a PCI-Express chip that integrates two asynchronous serial ports and one enhanced bidirectional parallel (printer) port. The serial ports are compatible with 16C550/16C750 standards and feature independent 256-byte FIFO buffers for both transmission and reception. Supporting communication speeds up to 8 Mbps, the CH382 is ideal for RS232 and RS485 serial port expansion, high-speed PCIe serial communication with automatic hardware flow control, and parallel port/printer port applications. It is commonly used in industrial automation, networking, and device interfacing. The diagram below illustrates its typical application block structure.

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