Datasheet

Section 16 I
2
C Bus Interface [H8S/2138 Group Option]
Rev. 4.00 Jun 06, 2006 page 458 of 1004
REJ09B0301-0400
SCL
in
SCL
out
SDA
in
SDA
out
(Slave 1)
SCL SDA
SCL
in
SCL
out
SDA
in
SDA
out
(Slave 2)
SCL SDA
SCL
in
SCL
out
SDA
in
SDA
out
(Master)
H8S/2138 Group chip
SCL
SDA
Vcc
VCC
SCL
SDA
Figure 16.2 I
2
C Bus Interface Connections (Example: H8S/2138 Group Chip as Master)
16.1.3 Input/Output Pins
Table 16.1 summarizes the input/output pins used by the I
2
C bus interface.
Table 16.1 I
2
C Bus Interface Pins
Channel Name Abbreviation
*
I/O Function
0 Serial clock SCL0 I/O IIC0 serial clock input/output
Serial data SDA0 I/O IIC0 serial data input/output
Formatless serial
clock
VSYNCI Input IIC0 formatless
serial clock input
1 Serial clock SCL1 I/O IIC1 serial clock input/output
Serial data SDA1 I/O IIC1 serial data input/output
Note: * In the text, the channel subscript is omitted, and only SCL and SDA are used.