R01UH0823EJ0100 Rev.1.00
Page 1143 of 1823
Jul 31, 2019
RX23W Group
35. I
2
C-bus Interface (RIICa)
Note:
ICBRH/ICBRL settings in these tables are calculated using the following values:
SCL0 line rising time (tr): 100 kbps or less (Sm): 1000 ns, 400 kbps or less (Fm): 300 ns
SCL0 line falling time (tf): 400 kbps or less (Sm/Fm): 300 ns
For the specified values of SCL0 line rising time (tr) and SCL0 line falling time (tf), see the I
2
C-bus specification from NXP
Semiconductors.
Table 35.5
Examples of ICBRH/ICBRL Settings for Transfer Rate
Transfer
Rate
(kbps)
Operating Frequency PCLK (MHz)
8
10
12.5
CKS[2:0]
ICBRH
ICBRL
CKS[2:0]
ICBRH
ICBRL
CKS[2:0]
ICBRH
ICBRL
10
100b
22 (F6h)
25 (F9h)
101b
13 (EDh)
15 (EFh)
101b
16 (F0h)
20 (F4h)
50
010b
16 (F0h)
19 (F3h)
010b
21 (F5h)
24 (F8h)
011b
12 (ECh)
15 (EFh)
100
001b
15 (EFh)
18 (F2h)
001b
19 (F3h)
23 (F7h)
001b
24 (F8h)
29 (FDh)
400
000b
4 (E4h)
10 (EAh)
000b
5 (E5h)
12 (ECh)
000b
7 (E7h)
16 (F0h)
Transfer
Rate
(kbps)
Operating Frequency PCLK (MHz)
16
20
25
CKS[2:0]
ICBRH
ICBRL
CKS[2:0]
ICBRH
ICBRL
CKS[2:0]
ICBRH
ICBRL
10
101b
22 (F6h)
25 (F9h)
110b
13 (EDh)
15 (EFh)
110b
16 (F0h)
20 (F4h)
50
011b
16 (F0h)
19 (F3h)
011b
21 (F5h)
24 (F8h)
100b
12 (ECh)
15 (EFh)
100
010b
15 (EFh)
18 (F2h)
010b
19 (F3h)
23 (F7h)
010b
24 (F8h)
29 (FDh)
400
000b
9 (E9h)
20 (F4h)
000b
11 (EBh)
25 (F9h)
001b
7 (E7h)
16 (F0h)
Transfer
Rate
(kbps)
Operating Frequency PCLK (MHz)
30
32
CKS[2:0]
ICBRH
ICBRL
CKS[2:0]
ICBRH
ICBRL
10
110b
20 (F4h)
24 (F8h)
110b
22 (F6h)
25 (F9h)
50
100b
15 (EFh)
18 (F2h)
100b
16 (F0h)
19 (F3h)
100
011b
14 (EEh)
17 (F1h)
011b
15 (EFh)
18 (F2h)
400
001b
8 (E8h)
19 (F3h)
001b
9 (E9h)
20 (F4h)