Datasheet

78K0/Ix2 CHAPTER 14 SERIAL INTERFACE UART6/DALI
R01UH0010EJ0500 Rev.5.00 472
Feb 28, 2012
Minimum permissible data frame length: FLmin = 11  FL   FL = FL
Therefore, the maximum receivable baud rate at the transmission destination is as follows.
BRmax = (FLmin/11)

1
= Brate
Similarly, the maximum permissible data frame length can be calculated as follows.
10 k + 2 21k  2
11 2  k 2  k
FLmax = FL  11
Therefore, the minimum receivable baud rate at the transmission destination is as follows.
BRmin = (FLmax/11)

1
= Brate
The permissible baud rate error between UART6 and the transmission destination can be calculated from the above
minimum and maximum baud rate expressions, as follows.
Table 14-7. Maximum/Minimum Permissible Baud Rate Error
Division Ratio (k) Maximum Permissible Baud Rate Error Minimum Permissible Baud Rate Error
4 +2.33% 2.44%
8 +3.53% 3.61%
20 +4.26% 4.31%
50 +4.56% 4.58%
100 +4.66% 4.67%
255 +4.72% 4.73%
Remarks 1. The permissible error of reception depends on the number of bits in one frame, input clock frequency,
and division ratio (k). The higher the input clock frequency and the higher the division ratio (k), the
higher the permissible error.
2. k: Set value of BRGC6
22k
21k + 2
 FLmax = 11  FL   FL = FL
21k – 2
20k
20k
21k  2
k  2
2k
21k + 2
2k