Transfer Clock - Renesas R8C Series User Manual

R8C/1A Group, R8C/1B Group
16.3.1

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 bits
CKS0 to CKS3 in the ICCR1 register and the transfer clock is output from the SCL pin.
Table 16.6 lists the Transfer Rate Examples.
Table 16.6 Transfer Rate Examples
ICCR1 Register
CKS3 CKS2 CKS1 CKS0
0 0 0
1
1 0
1
1 0 0
1
1 0
1
Rev.1.30 Dec 08, 2006
REJ09B0252-0130
Transfer
Clock
f1 = 5 MHz f1 = 8 MHz f1 = 10 MHz f1 = 16 MHz f1 = 20 MHz
0 f1/28 179 kHz
1 f1/40 125 kHz
0 f1/48 104 kHz
1 f1/64 78.1 kHz
0 f1/80 62.5 kHz
1 f1/100 50.0 kHz
0 f1/112 44.6 kHz
1 f1/128 39.1 kHz
0 f1/56 89.3 kHz
1 f1/80 62.5 kHz
0 f1/96 52.1 kHz
1 f1/128 39.1 kHz
0 f1/160 31.3 kHz
1 f1/200 25.0 kHz
0 f1/224 22.3 kHz
1 f1/256 19.5 kHz
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16. Clock Synchronous Serial Interface
Transfer Rate
286 kHz 357 kHz
200 kHz 250 kHz
167 kHz 208 kHz
125 kHz 156 kHz
100 kHz 125 kHz
80.0 kHz 100 kHz
71.4 kHz 89.3 kHz
62.5 kHz 78.1 kHz
143 kHz 179 kHz
100 kHz 125 kHz
83.3 kHz 104 kHz
62.5 kHz 78.1 kHz
50.0 kHz 62.5 kHz
40.0 kHz 50.0 kHz
35.7 kHz 44.6 kHz
31.3 kHz 39.1 kHz
571 kHz 714 kHz
400 kHz 500 kHz
333 kHz 417 kHz
250 kHz 313 kHz
200 kHz 250 kHz
160 kHz 200 kHz
143 kHz 179 kHz
125 kHz 156 kHz
286 kHz 357 kHz
200 kHz 250 kHz
167 kHz 208 kHz
125 kHz 156 kHz
100 kHz 125 kHz
80.0 kHz 100 kHz
71.4 kHz 89.3 kHz
62.5 kHz 78.1 kHz