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15.3.10.1 Low-Frequency Baud Rate Mode Setting In the low-frequency mode, the integer portion of the divisor is realized by the prescaler: UCBRx = INT(N) and the fractional portion is realized by the modulator with the following nominal formula: UCBRSx = round( ( N – INT(N) ) × 8 ) Incrementing or decrementing the UCBRSx setting by one count may give a lower maximum bit error for any given bit. To determine if this is the case, a detailed error calculation must be performed for each bit for each UCBRSx setting.
