
Rev. 2.0, 09/02, page 435 of 732
Bit
Bit
Name
Initial Value
R/W
Description
2
0
R
This bit is reserved and always returns 0 when read,
and should only be written with 0.
1
ICDRF0
0
R
This bit indicates whether or not ICDR contains valid
received data.
0: Indicates that ICDR does not contain valid received
data.
1: Indicates that ICDR contains valid received data.
0
STOPIM
0
R/W
Stop-condition-detected-interrupt mask
This bit enables/disables the issuing of stop-condition-
detected interrupt requests in the I
slave mode.
0: This setting enables the stop-condition-detected
interrupt requests in the I
mode.
1: This setting disables the stop-condition-detected
interrupt requests in the I
mode.
2
C bus format in the
2
C bus format in the slave
2
C bus format in the slave
Note:
*
Set this bit to 1.
14.4
Operation
14.4.1
I
2
C Bus Data Formats
The I
format. The I
addressing format includes the transfer of acknowledge bits. This is shown in figures 14.3, (a) and
(b). The first frame after the start condition always consists of 8 bits.
2
C bus interface is capable of transferring data in either the serial format or the I
2
C bus format is referred to as an addressing format. The transfer of data in this
2
C bus
The serial format is referred to as a ‘non-addressing format’. The transfer of data in this non-
addressing format does not include the transfer of an acknowledge bit. This is shown in figure
14.4. The I
2
C bus timing is shown in figure 14.5.
The symbols used in figures 14.3 to 14.5 are described in table 14.7.