17/03/2025 7:04 am
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I know a little about RS232 and UART, and I understand that both are serial communication protocols. However, I’d like to understand them more broadly. Can anyone explain their key differences in terms of functionality and applications?
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18/03/2025 4:56 am
The following points highlight the major differences between UART and RS-232:
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UART (Universal Asynchronous Receiver-Transmitter) is a hardware module responsible for serial communication, whereas RS-232 is a communication standard that defines voltage levels and signaling for serial data exchange.
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UART operates at TTL logic levels, typically 0V for LOW and 3.3V or 5V for HIGH, while RS-232 uses higher voltage levels, ranging from ±3V to ±15V.
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UART manages data framing with start and stop bits, whereas RS-232 does not define framing but specifies the physical layer, including connectors and wiring.
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Since RS-232 operates at different voltage levels, a level shifter like MAX232 is required to interface RS-232 signals with UART-based TTL logic devices.
