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RS-232 Functional Characteristics Quiz

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Questions and Answers

What is the function of pin 5 in an RS-232 connection?

Signal reference for all data, control, and timing signals

Handshake signal from DCE to DTE (correct)

Receive data from DCE to DTE

Request to send data from DTE to DCE

Which pin on an RS-232 connection indicates the availability of the communications channel?

Pin 8

Pin 4

Pin 6 (correct)

Pin 3

On an RS-232 connection, what is the purpose of pin 7?

Handshake signal from DCE to DTE

Request to send data from DTE to DCE

Receive data from DCE to DTE

Signal reference for all data, control, and timing signals (correct)

What does pin 4 signify in an RS-232 connection?

Permission request from DTE to DCE Signup and view all the answers

Which pin in an RS-232 connection is responsible for transmitting data from DTE to DCE?

Pin 2 Signup and view all the answers

If a device connected via RS-232 receives an active condition on RTS, what should it expect subsequently based on the standard protocol?

'Handshake' signal on CTS Signup and view all the answers

Study Notes

RS-232 Connection Pin Functions

Pin 5 is the Signal Ground, serving as the common reference point for all signals in the RS-232 connection.
Pin 4 indicates the Request to Send (RTS) status, which signals the availability of the communications channel for data transmission.
Pin 7 acts as the Clear to Send (CTS) line, confirming to the DTE (Data Terminal Equipment) that the DCE (Data Communication Equipment) is ready to receive data.
Pin 3 is used for Transmit Data (TD), responsible for transmitting data from the DTE to the DCE.
Upon receiving an active condition on RTS, the device should expect the Clear to Send (CTS) signal, allowing it to commence data transmission.

Key Signals in RS-232

An active RTS line means that the sender is ready to initiate communication.
CTS is a critical response that ensures the DCE can accept data from the DTE, ensuring proper data flow and communication integrity.

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Description

Test your knowledge on the RS-232 functional characteristics including chassis ground, transmit data, receive data, and request to send. This quiz is based on the ECE course at Saint Louis University, Baguio City.