![]() The primary application scenario is to enable USB-based computers to access and communicate with serial devices featuring D-sub (usually DB9 or DB25) connectors or screw terminals, where security of the data transmission is not generally an issue. ![]() Currently, USB to TTL-level UART converters are used extensively by students and hobbyist as they can be directly interfaced to microcontrollers.Īdapters for converting USB to other standard or proprietary protocols also exist however, these are usually not referred to as a serial adapter. USB to serial RS232 adapters are often used with consumer, commercial and industrial applications and USB-to-serial RS-485/422 adapters are usually mainly used only with industrial applications. The older serial RS423 protocol is rarely used any more, so USB to RS423 adapters are less common. Most commonly the USB data signals are converted to either RS-232, RS-485, RS-422, or TTL-level UART serial data. A USB-to-serial adapter or simply USB adapter is a type of protocol converter that is used for converting USB data signals to and from serial communications standards ( serial ports).
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September 2023
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