HD64F2149 Datasheet, PDF (521/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

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 STCR register, select the serial clock frequency in master mode.
They should be set according to the required transfer rate.
STCR
Bit 5 or 6 Bit 5 Bit 4 Bit 3
Transfer Rate
ø=
IICX
CKS2 CKS1 CKS0 Clock 5 MHz
ø=
8 MHz
ø=
10 MHz
0
0
0
0
ø/28 179 kHz
286 kHz
357 kHz
1
ø/40 125 kHz
200 kHz
250 kHz
1
0
ø/48 104 kHz
167 kHz
208 kHz
1
ø/64 78.1 kHz
125 kHz
156 kHz
1
0
0
ø/80 62.5 kHz
100 kHz
125 kHz
1
ø/100 50.0 kHz
80.0 kHz
100 kHz
1
0
ø/112 44.6 kHz
71.4 kHz
89.3 kHz
1
ø/128 39.1 kHz
62.5 kHz
78.1 kHz
1
0
0
0
ø/56 89.3 kHz
143 kHz
179 kHz
1
ø/80 62.5 kHz
100 kHz
125 kHz
1
0
ø/96 52.1 kHz
83.3 kHz
104 kHz
1
ø/128 39.1 kHz
62.5 kHz
78.1 kHz
1
0
0
ø/160 31.3 kHz
50.0 kHz
62.5 kHz
1
ø/200 25.0 kHz
40.0 kHz
50.0 kHz
1
0
ø/224 22.3 kHz
35.7 kHz
44.6 kHz
1
ø/256 19.5 kHz
31.3 kHz
39.1 kHz
Note: Maximum operating frequency of H8S/2169 and H8S/2149 is 10 MHz.
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