Which pin of RS232 connector is used for Transmit Data (TXD)? (i) Pin

Back to the 2024 paper

Module 5: External Communication Interface

20242m

Which pin of RS232 connector is used for Transmit Data (TXD)?
(i) Pin 2
(ii) Pin 1
(iii) Pin 4
(iv) Pin 3

Worked SolutionAI Assisted

Answer: (iv) Pin 3

Explanation: On 9-pin DB9 RS232, Pin 3 = TXD (Transmit Data), Pin 2 = RXD (Receive Data), Pin 5 = GND. On 25-pin DB25, Pin 2 = TXD. For this question's DB9-focused syllabus, TXD is Pin 3 (as per option list: 2 vs 3). The more common textbook answer for 9-pin connector: Pin 3 is TXD.

Similar questions

MICROPROCESSORSWhich protocol standard of serial communication specifies the bi-directional and half-duplex form of data transmission by allowing various numbers of drivers and receivers in bus configuration? (i) RS232 (ii) RS2485 (iii) RS422 (iv) RS42320212m MICROPROCESSORSWhich lines are utilized during the enable state of hardware flow control in DTE and DCE devices of RS232? (i) CD and IR (ii) DSR and DTR (iii) RTS and CTS (iv) None of the above20212m MICROPROCESSORSWhat is the bit transmitting or receiving capability of mode 1 in serial communication? (i) 8 bits (ii) 10 bits (iii) 11 bits (iv) 12 bits20212m MICROPROCESSORSWhich port has dual functionality in 8051? (i) Port 0 (ii) Port 2 (iii) Port 1 (iv) Port 320252m

PreviousWhat is the function of ALE signal in 8051? (i) Latches lower address byte (ii) Enables timers (iii) Selects internal memory (iv) Controls interrupt NextHow many lines are used in the basic SPI communication? (i) 5 (ii) 2 (iii) 4 (iv) 3

Official AppAndroid App

PYQDeck for Android

Solve BEU previous-year exam papers anywhere, anytime. Fast search, offline paper viewing, and step-by-step solutions designed specifically for your phone.

Get on Google Play