Renesas H8S/2633 Series Hardware Manual page 865

Bits 5 to 3—Serial Clock Select (CKS2 to CKS0): These bits, together with the IICX1 (channel
1) or IICX0 (channel 0) bit in the SCRX register, select the serial clock frequency in master mode.
They should be set according to the required transfer rate.
SCRX
Bit 5
or 6 Bit 5 Bit 4
IICX CKS2 CKS1
0 0 0
1
1 0
1
1 0 0
1
1 0
1
Note: * These rates are outside the ranges stipulated in the I
mode: max. 100 kHz, high-speed mode: max. 400 kHz).
Bit 3
ø =
CKS0 Clock 5 MHz
0 ø/28 179 kHz
1 ø/40 125 kHz
0 ø/48 104 kHz
1 ø/64 78.1 kHz
0 ø/80 62.5 kHz
1 ø/100 50.0 kHz
0 ø/112 44.6 kHz
1 ø/128 39.1 kHz
0 ø/56 89.3 kHz
1 ø/80 62.5 kHz
0 ø/96 52.1 kHz
1 ø/128 39.1 kHz
0 ø/160 31.3 kHz
1 ø/200 25.0 kHz
0 ø/224 22.3 kHz
1 ø/256 19.5 kHz
Transfer Rate
ø = ø = ø =
8 MHz 10 MHz 16 MHz
286 kHz 357 kHz 571 kHz* 714 kHz* 893 kHz* 1000 kHz*
200 kHz 250 kHz 400 kHz
167 kHz 208 kHz 333 kHz
125 kHz 156 kHz 250 kHz
100 kHz 125 kHz 200 kHz
80.0 kHz 100 kHz 160 kHz
71.4 kHz 89.3 kHz 143 kHz
62.5 kHz 78.1 kHz 125 kHz
143 kHz 179 kHz 286 kHz
100 kHz 125 kHz 200 kHz
83.3 kHz 104 kHz 167 kHz
62.5 kHz 78.1 kHz 125 kHz
50.0 kHz 62.5 kHz 100 kHz
40.0 kHz 50.0 kHz 80.0 kHz
35.7 kHz 44.6 kHz 71.4 kHz
31.3 kHz 39.1 kHz 62.5 kHz
2
C bus interface specifications (normal
ø = ø = ø =
20 MHz 25 MHz 28 MHz
500 kHz* 625 kHz* 700 kHz*
417 kHz* 521 kHz* 583 kHz*
313 kHz 391 kHz 438 kHz*
250 kHz 313 kHz 350 kHz
200 kHz 250 kHz 280 kHz
179 kHz 223 kHz 250 kHz
156 kHz 195 kHz 219 kHz
357 kHz 446 kHz* 500 kHz*
250 kHz 313 kHz 350 kHz
208 kHz 260 kHz 292 kHz
156 kHz 195 kHz 219 kHz
125 kHz 156 kHz 175 kHz
100 kHz 125 kHz 140 kHz
89.3 kHz 112 kHz 125 kHz
78.1 kHz 97.7 kHz 109 kHz
811