Rev. 1.0, 02/00, page 471 of 1141
Bits 5 to 3
Transfer Clock Select (CKS2 to CKS0): These bits, together with the IICX1 bit
(for channel 1) or IICX0 bit (for channel 0) in STCR, select the serial clock frequency in master
mode. They should be set according to the required transfer rate.
STCR
Bits 5, 6
Bit 5
Bit 4
Bit 3
Transfer Rate
IICX
CKS2
CKS1
CKS0
Clock
φφφφ
= 8 MHz
φφφφ
= 10 MHz
0
φ
/28
286 kHz
357 kHz
0
1
φ
/40
200 kHz
250 kHz
0
φ
/48
167 kHz
208 kHz
0
1
1
φ
/64
125 kHz
156 kHz
0
φ
/80
100 kHz
125 kHz
0
1
φ
/100
80.0 kHz
100 kHz
0
φ
/112
71.4 kHz
89.3 kHz
0
1
1
1
φ
/128
62.5 kHz
78.1 kHz
0
φ
/56
143 kHz
179 kHz
0
1
φ
/80
100 kHz
125 kHz
0
φ
/96
83.3 kHz
104 kHz
0
1
1
φ
/128
62.5 kHz
78.1 kHz
0
φ
/160
50.0 kHz
62.5 kHz
0
1
φ
/200
40.0 kHz
50.0 kHz
0
φ
/224
35.7 kHz
44.6 kHz
1
1
1
1
φ
/256
31.3 kHz
39.1 kHz