R8C16 Datasheet, PDF (162/279 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / R8C/Tiny SERIES

R8C/16 Group, R8C/17 Group
15. I²C bus interface (IIC)
15.1 Transfer Clock
When the MST bit in the ICCR1 register is set to “0”, the transfer clock is the external clock input from the
SCL pin. When the MST bit in the ICCR1 register is set to “1”, the transfer clock is the internal clock
selected by the CKS0 to CKS3 bits in the ICCR1 register and the transfer clock is output from the SCL
pin. Table 15.2 lists the Example of Transfer Rate.
Table 15.2 Example of Transfer Rate
ICCR1 Register
Transfer Clock
CKS3 CKS2 CKS1 CKS0
0
0
0
0
f1/28
1
f1/40
1
0
f1/48
1
f1/64
1
0
0
f1/80
1
f1/100
1
0
f1/112
1
f1/128
1
0
0
0
f1/56
1
f1/80
1
0
f1/96
1
f1/128
1
0
0
f1/160
1
f1/200
1
0
f1/224
1
f1/256
f1=5MHz
179kHz
125kHz
104kHz
78.1kHz
62.5kHz
50.0kHz
44.6kHz
39.1kHz
89.3kHz
62.5kHz
52.1kHz
39.1kHz
31.3kHz
25.0kHz
22.3kHz
19.5kHz
Transfer Rate
f1=8MHz f1=10MHz f1=16MHz f1=20MHz
286kHz 357kHz 571kHz 714kHz
200kHz 250kHz 400kHz 500kHz
167kHz 208kHz 333kHz 417kHz
125kHz 156kHz 250kHz 313kHz
100kHz 125kHz 200kHz 250kHz
80.0kHz 100kHz 160kHz 200kHz
71.4kHz 89.3kHz 143kHz 179kHz
62.5kHz 78.1kHz 125kHz 156kHz
143kHz 179kHz 286kHz 357kHz
100kHz 125kHz 200kHz 250kHz
83.3kHz 104kHz 167kHz 208kHz
62.5kHz 78.1kHz 125kHz 156kHz
50.0kHz 62.5kHz 100kHz 125kHz
40.0kHz 50.0kHz 80.0kHz 100kHz
35.7kHz 44.6kHz 71.4kHz 89.3kHz
31.3kHz 39.1kHz 62.5kHz 78.1kHz
Rev.2.10 Jan 19, 2006 Page 149 of 254
REJ09B0169-0210