Datasheet

Section 16 I
2
C Bus Interface [H8S/2138 Group Option]
Rev. 4.00 Jun 06, 2006 page 497 of 1004
REJ09B0301-0400
(a) When WAIT = 0, and FS = 0 or FSX = 0 (I
2
C bus format, no wait)
SCL
SDA
IRIC
User processing Clear IRIC Write to ICDR (transmit)
or read ICDR (receive)
1A8
1
1
A
7
1897
(b) When WAIT = 1, and FS = 0 or FSX = 0 (I
2
C bus format, wait inserted)
SCL
SDA
IRIC
User processing Clear
IRIC
Clear
IRIC
Write to ICDR (transmit)
or read ICDR (receive)
SCL
SDA
IRIC
User processing
(c) When FS = 1 and FSX = 1 (synchronous serial format)
Clear IRIC Write to ICDR (transmit)
or read ICDR (receive)
8
89
8
7
1
8
7
1
Figure 16.12 IRIC Setting Timing and SCL Control