h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 607

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

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.
Note: * These rates are outside the ranges stipulated in the I
SCRX
Bit
5 or 6 Bit 5
IICX
0
1
mode: max. 100 kHz, high-speed mode: max. 400 kHz).
CKS2
0
1
0
1
Section 15 I
Bit 4
CKS1
0
1
0
1
0
1
0
1
2
C Bus Interface [Option] (Only for the H8S/2638, H8S/2639, and H8S/2630)
Bit 3
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
CKS0
Clock
/28
/40
/48
/64
/80
/100 50.0 kHz
/112 44.6 kHz
/128 39.1 kHz
/56
/80
/96
/128 39.1 kHz
/160 31.3 kHz
/200 25.0 kHz
/224 22.3 kHz
/256 19.5 kHz
5 MHz
179 kHz
125 kHz
104 kHz
78.1 kHz
62.5 kHz
89.3 kHz
62.5 kHz
52.1 kHz
=
286 kHz
200 kHz
167 kHz
80.0 kHz 100 kHz
71.4 kHz 89.3 kHz 143 kHz
62.5 kHz 78.1 kHz 125 kHz
83.3 kHz 104 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 100 kHz
35.7 kHz 44.6 kHz 71.4 kHz 89.3 kHz
31.3 kHz 39.1 kHz 62.5 kHz 78.1 kHz
8 MHz
125 kHz
100 kHz
143 kHz
100 kHz
Rev. 6.00 Feb 22, 2005 page 547 of 1484
=
2
C bus interface specifications (normal
Transfer Rate
10 MHz
357 kHz
250 kHz
208 kHz
156 kHz
125 kHz
179 kHz
125 kHz
=
16 MHz
571 kHz * 714 kHz *
400 kHz
333 kHz
250 kHz
200 kHz
160 kHz
286 kHz
200 kHz
167 kHz
=
REJ09B0103-0600
20 MHz
500 kHz *
417 kHz *
313 kHz
250 kHz
200 kHz
179 kHz
156 kHz
357 kHz
250 kHz
208 kHz
156 kHz
125 kHz
=