Find the baud rate for the synchronous master operating mode when the oscillator frequency, fOSC = 18MHz, and register data is, UBRRn = 011100101011. Calculate the baud error and comment on whetherthere will be any communication error or not. Standard Baud rates are: 300, 600, 1200, 2400, 4800, 9600,14400,19200, 38400, 57600, 115200, 230400, ... bps
Question
Find the baud rate for the synchronous master operating mode when the oscillator frequency, fOSC = 18MHz, and register data is, UBRRn = 011100101011. Calculate the baud error and comment on whetherthere will be any communication error or not. Standard Baud rates are: 300, 600, 1200, 2400, 4800, 9600,14400,19200, 38400, 57600, 115200, 230400, ... bps
Solution 1
To calculate the baud rate for the synchronous master operating mode, we need to use the formula:
Baud Rate = fOSC / (2(UBRRn + 1))
First, we need to convert the UBRRn value from binary to decimal. The binary value 011100101011 is equal to 3707 in decimal.
Now, we can substitute the values into the formula:
Baud Rate = 18,000,000 / (2(3707 + 1))
This gives us a baud rate of approximately 2424 bps.
Now, let's calculate the baud error. The standard baud rate closest to our calculated value is 2400 bps. The baud error can be calculated using the formula:
Baud Error = ((Calculated Baud Rate - Standard Baud Rate) / Standard Baud Rate) * 100%
Substituting the values into the formula:
Baud Error = ((2424 - 2400) / 2400) * 100%
This gives us a baud error of approximately 1%.
A baud error of 1% is generally acceptable for most applications. Therefore, it is unlikely that there will be any communication error due to the baud rate. However, other factors such as noise, signal distortion, and timing errors can also cause communication errors.
Solution 2
No answer
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