Because of this, device manufacturers can create an alternate, or custom driver that is capable of accessing the device specific function sets, such as hardware flow control or GPIO functions. ![]() This generic driver does not have any knowledge about specific device protocols. The CDC-ACM driver has limited capabilities to control specific devices. In Linux, this driver file name is cdc-acm. ![]() Linux operating systems supply a default CDC-ACM driver that can be used with these USB UART devices. USB to UART(s) chip ch342/ch343/ch344/ch347/ch9101/ch9102/ch9103/ch9143 are fully compliant to the Communications Device Class (CDC) standard, they will work with a standard CDC-ACM driver (CDC - Abstract Control Model).
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