Datasheet

V850ES/JG3 CHAPTER 15 ASYNCHRONOUS SERIAL INTERFACE A (UARTA)
R01UH0015EJ0300 Rev.3.00 Page 482 of 870
Sep 30, 2010
(6) Baud rate during continuous transmission
During continuous transmission, the transfer rate from the stop bit to the next start bit is usually 2 base clocks
longer. However, timing initialization is performed via start bit detection by the receiving side, so this has no
influence on the transfer result.
Figure 15-18. Transfer Rate During Continuous Transfer
Start bit
Bit 0 Bit 1 Bit 7
Parity bit Stop bit
FL
1 data frame
FL FL FL FL FLFLFLstp
Start bit of 2nd byte
Start bit
Bit 0
Assuming 1 bit data length: FL; stop bit length: FLstp; and base clock frequency: f
UCLK, we obtain the following
equation.
FLstp = FL + 2/f
UCLK
Therefore, the transfer rate during continuous transmission is as follows.
Transfer rate = 11 × FL + (2/f
UCLK)