(Serial Interface) What is the formula for computing UART transfer bit rate? [2005/04/12]
- When using the internal clock for the synchronous clock
Transfer bit rate (bps) = f ( XIN ) ( BRG setting value + 1 ) × 16 × m m : BRG count source select bit = When "0", m = 1 BRG count source select bit = When "1", m = 4
- When using external clock as synchronous clock
Transfer bit rate ( bps ) = f ( SCLK ) / 16
Please consider timing requirements regarding external clock frequency f(SCLK).
A value which satisfies the minimum time specified in tc (SCLK) must be set.
Refer to the electrical characteristics in the datasheet for timing requirements.