Rev. 1.0, 02/00, page 1069 of 1141
H'D15F: I
2
C Bus Mode Register ICMR1: I
2
C Bus Interface
7
MLS
0
R/W
6
WAIT
0
R/W
5
CKS2
0
R/W
4
CKS1
0
R/W
3
CKS0
0
R/W
0
BC0
0
R/W
2
BC2
0
R/W
1
BC1
0
R/W
MSB-first/LSB-first select
0 MSB-first
(initial value)
1 LSB-first
Wait insertion bit
0 Data and acknowledge bits transferred consecutively
(initial value)
1 Wait inserted between data and acknowledge bits
Transfer clock select bits
Bit counter
Bit/frame
BC2 BC1 BC0 Clock sync I
2
C bus format
serial format
0 0 0 8 9 (Initial value)
1 1 2
1 0 2 3
1 3 4
0 0 0 4 5
1 5 6
1 0 6 7
1 7 8
Bit :
Initial value :
R/W :
Note: * See bit 6 in STCR.
IICX* CKS2 CKS1 CKS0 Clock Transfer rate
φ
=8 MHz
φ
=10 MHz
0 0 0 0
φ
/28
286 kHz
357 kHz
1
φ
/40
200 kHz
250 kHz
1 0
φ
/48
167 kHz
208 kHz
1
φ
/64
125 kHz
156 kHz
1 0 0
φ
/80
100 kHz
125 kHz
1
φ
/100
80.0 kHz
100 kHz
1 0
φ
/112
71.4 kHz
89.3 kHz
1
φ
/128
62.5 kHz
78.1 kHz
1 0 0 0
φ
/56
143 kHz
179 kHz
1
φ
/80
100 kHz
125 kHz
1 0
φ
/96
83.3 kHz
104 kHz
1
φ
/128
62.5 kHz
78.1 kHz
1 0 0
φ
/160
50.0 kHz
62.5 kHz
1
φ
/200
40.0 kHz
50.0 kHz
1 0
φ
/224
35.7 kHz
44.6 kHz
1
φ
/256
31.3 kHz
39.1 kHz