Topic: Communication Systems
500 Bits of data needs to be transmitted from an UART every 100 ms. What should be the minimum transmission baud rate of UART, assuming 1 start bit, 8 data bits and 2 stop bits?
- A. 50000
- B. 55000
- C. 40000
- D. 45000
Answer: B. 55000
Explanation: Assuming the question intended 500 Bytes based on the standard UART 8-bit frame (typographical error in the source material):
Each byte requires $N_{start} + N_{data} + N_{stop} = 1 + 8 + 2 = 11\text{ bits}$.
Total number of bits to transmit $= 500\text{ bytes} \times 11\text{ bits/byte} = 5500\text{ bits}$.
Time allowed $T = 100\text{ ms} = 0.1\text{ s}$.
Baud rate (bits per second) $= \frac{5500}{0.1} = 55000\text{ bps}$.