Datasheet

CHAPTER 14 SERIAL INTERFACE UART6
User’s Manual U18698EJ1V0UD
371
(2) Error of baud rate
The baud rate error can be calculated by the following expression.
• Error (%) = − 1 × 100 [%]
Cautions 1. Keep the baud rate error during transmission to within the permissible error range at the
reception destination.
2. Make sure that the baud rate error during reception satisfies the range shown in (4)
Permissible baud rate range during reception.
Example: Frequency of base clock = 10 MHz = 10,000,000 Hz
Set value of MDL67 to MDL60 bits of BRGC6 register = 00100001B (k = 33)
Target baud rate = 153600 bps
Baud rate = 10 M / (2 × 33)
= 10000000 / (2 × 33) = 151,515 [bps]
Error = (151515/153600 − 1) × 100
= −1.357 [%]
Actual baud rate (baud rate with error)
Desired baud rate (correct baud rate)