UART-1 MCQ’s

Electronics & Communication Engineering Embedded System

This set of Embedded System Multiple Choice Questions & Answers (MCQs) focuses on “UART-1″.

1. How is the baud rate supplied?
a) baud rate voltage
b) external timer
c) peripheral
d) internal timer

2. Which of the signal is set to one, if no data is transmitted?
a) READY
b) START
c) STOP
d) TXD

3. Which of the signal can control bus arbitration logic in 8250?
a) MR
b) DDIS
c) INTR
d) RCLK

4. What does UART stand for?
a) universal asynchronous receiver transmitter
b) unique asynchronous receiver transmitter
c) universal address receiver transmitter
d) unique address receiver transmitter

5. Which is the most commonly used UART?
a) 8253
b) 8254
c) 8259
d) 8250

6. What rate can define the timing in the UART?
a) bit rate
b) baud rate
c) speed rate
d) voltage rate

7. Which of the following signals are active low in the 8250 UART?
a) BAUDOUT
b) DDIS
c) INTR
d) MR

8. Which company developed 16450?
a) Philips
b) Intel
c) National semiconductor
d) IBM

9. What does ADS indicate in 8250 UART?
a) address signal
b) address terminal signal
c) address strobe signal
d) address generating signal

10. How is data detected in a UART?
a) counter
b) timer
c) clock
d) first bit

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