661
ICCR—I
2
C Bus Control Register
H'D8
I
2
C
Bit
Initial value
Read/Write
7
ICE
0
R/W
6
IEIC
0
R/W
5
MST
0
R/W
4
TRS
0
R/W
3
ACK
0
R/W
0
CKS0
0
R/W
2
CKS2
0
R/W
1
CKS1
0
R/W
Transfer Clock Select
Acknowledgement Mode Select
0
1
Serial mode
Acknowledgement mode
Master/Slave Select and Transmit/Receive Select
0
Slave receive mode
Slave transmit mode
Master receive mode
Master transmit mode
1
1
0
1
0
I
2
C Bus Interface Interrupt Enable
0
1
Interrupts enabled
Interrupts disabled
I
2
C Bus Interface Enable
0
1
Interface module enabled for transfer operations, with pins SCL and SDA capable of bus drive
Interface module disabled, with pins SCL and SDA operating as ports
IICX
*
CKS2 CKS1 CKS0
Clock
Transfer Rate
Note:
The shaded setting exceeds the maximum transfer rate in the standard I
2
C bus
specifications.
*
IICX is bit 5 of the serial timer control register (STCR).
P
= .
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
P
/28
P
/40
P
/48
P
/64
P
/80
P
/100
P
/112
P
/128
P
/56
P
/80
P
/96
P
/128
P
/160
P
/200
P
/224
P
/256
143 kHz
100 kHz
83.3 kHz
62.5 kHz
50.0 kHz
40.0 kHz
35.7 kHz
31.3 kHz
71.4 kHz
50.0 kHz
41.7 kHz
31.3 kHz
25.0 kHz
20.0 kHz
17.9 kHz
15.6 kHz
P
= 4 MHz
P
= 5 MHz
P
= 8 MHz
P
= 10 MHz
P
= 16 MHz
179 kHz
125 kHz
104 kHz
78.1 kHz
62.5 kHz
50.0 kHz
44.6 kHz
39.1 kHz
89.3 kHz
62.5 kHz
52.1 kHz
39.1 kHz
31.3 kHz
25.0 kHz
22.3 kHz
19.5 kHz
31.3 kHz
286 kHz
200 kHz
167 kHz
125 kHz
100 kHz
80.0 kHz
71.4 kHz
62.5 kHz
143 kHz
100 kHz
83.3 kHz
62.5 kHz
50.0 kHz
40.0 kHz
35.7 kHz
357 kHz
250 kHz
208 kHz
156 kHz
125 kHz
100 kHz
89.3 kHz
78.1 kHz
179 kHz
125 kHz
104 kHz
78.1 kHz
62.5 kHz
50.0 kHz
44.6 kHz
39.1 kHz
571 kHz
400 kHz
333 kHz
250 kHz
200 kHz
160 kHz
143 kHz
125 kHz
286 kHz
200 kHz
167 kHz
125 kHz
100 kHz
80.0 kHz
71.4 kHz
62.5 kHz