R01UH0823EJ0100 Rev.1.00
Page 995 of 1823
Jul 31, 2019
RX23W Group
33. Serial Communications Interface (SCIg, SCIh)
Table 33.22
BRR Settings for Various Bit Rates (Simple I
2
C Mode)
Bit Rate
(bps)
Operating Frequency PCLK (MHz)
8
10
16
20
25
n
N
Error (%) n
N
Error (%) n
N
Error (%) n
N
Error (%) n
N
Error (%)
10 k
0
24
0.0
0
31
–2.3
1
12
–3.8
1
15
–2.3
1
19
–2.3
25 k
0
9
0.0
0
12
–3.8
1
4
0.0
1
6
–10.7
1
7
–2.3
50 k
0
4
0.0
0
6
–10.7
1
2
–16.7
1
3
–21.9
1
3
–2.3
100 k
0
2
–16.7
0
3
–21.9
0
4
0.0
0
6
–10.7
1
1
–2.3
250 k
0
0
0.0
0
1
–37.5
0
1
0.0
0
2
–16.7
0
3
–21.9
350 k
0
1
–10.7
0
2
–25.6
Bit Rate
(bps)
Operating Frequency
PCLK (MHz)
30
n
N
Error (%)
10 k
1
23
–2.3
25 k
1
9
–6.3
50 k
1
4
–6.3
100 k
1
2
–21.9
250 k
0
3
–6.3
350 k
0
2
–10.7
Table 33.23
Minimum Widths at High and Low Level for SCL at Various Bit Rates (Simple I
2
C Mode)
Bit Rate
(bps)
Operating Frequency PCLK (MHz)
8
10
16
20
n
N
Min. Widths at
High/Low Level
for SCL (μs)
n
N
Min. Widths at
High/Low Level
for SCL (μs)
n
N
Min. Widths at
High/Low Level
for SCL (μs)
n
N
Min. Widths at
High/Low Level
for SCL (μs)
10 k
0
24
43.75/50.00
0
31
44.80/51.20
1
12
45.50/52.00
1
15
44.80/51.20
25 k
0
9
17.50/20.00
0
12
18.20/20.80
1
4
17.50/20.00
1
6
19.60/22.40
50 k
0
4
8.75/10.00
0
6
9.80/11.20
1
2
10.50/12.00
1
3
11.20/12.80
100 k
0
2
5.25/6.00
0
3
5.60/6.40
0
4
4.37/5.00
0
6
4.90/5.60
250 k
0
0
1.75/2.00
0
1
2.80/3.20
0
1
1.75/2.00
0
2
2.10/2.40
350 k
0
1
1.40/1.60
Bit Rate
(bps)
Operating Frequency PCLK (MHz)
25
30
n
N
Min. Widths at
High/Low Level
for SCL (μs)
n
N
Min. Widths at
High/Low Level
for SCL (μs)
10 k
1
19
44.80/51.20
1
23
44.80/51.20
25 k
1
7
17.92/20.48
1
9
18.66/21.33
50 k
1
3
8.96/10.24
1
4
9.33/10.66
100 k
1
1
4.48/5.12
1
2
5.60/6.40
250 k
0
3
2.24/2.56
0
3
1.86/2.13
350 k
0
2
1.68/1.92
0
2
1.40/1.60