Datasheet

Section 16 I
2
C Bus Interface [Option]
Rev. 4.00 Sep 27, 2006 page 494 of 1130
REJ09B0327-0400
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/2148 Group and
H8S/2147N chip
SCL
SDA
Vcc
VCC
SCL
SDA
Figure 16.2 I
2
C Bus Interface Connections
(Example: H8S/2148 Group and H8S/2147N 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.