Renesas Hitachi H8S/2194 Series Hardware Manual page 556

16-bit single-chip microcomputer
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Bits 5 to 3: Transfer Clock Select (CKS2 to CKS0)
These bits, together with the IICX bit in the STCR register, select the serial clock frequency in
master mode. They should be set according to the required transfer rate.
STCR
Bit 6
Bit 5
IICX
CKS2
0
0
1
1
0
1
Bit 4
Bit 3
CKS1
CKS0
0
0
1
1
0
1
0
0
1
1
0
1
0
0
1
1
0
1
0
0
1
1
0
1
Transfer Rate
φ = 5 MHz
Clock
φ/28
179 kHz
φ/40
125 kHz
φ/48
104 kHz
φ/64
78.1 kHz
φ/80
62.5 kHz
φ/100
50.0 kHz
φ/112
44.6 kHz
φ/128
39.1 kHz
φ/56
89.3 kHz
φ/80
62.5 kHz
φ/96
52.1 kHz
φ/128
39.1 kHz
φ/160
31.3 kHz
φ/200
25.0 kHz
φ/224
22.3 kHz
φ/256
19.5 kHz
Rev. 2.0, 11/00, page 529 of 1037
φ = 8 MHz
φ = 10 MHz
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

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