Input/Output Pins; Register Description - Hitachi H8S/2378, H8S/2378R Series Hardware Manual

SCL in
out
SDA in
out
(Master)
Figure 16.2 External Circuit Connections of I/O Pins
16.2

Input/Output Pins

Table 16.1 summarizes the input/output pins used by the I
2
Table 16.1 I C Bus Interface Pins
Name Abbreviation
Serial clock SCL0
Serial data SDA0
Serial clock SCL1
Serial data SDA1
Note: The pin symbols are represented as SCL and SDA; channel numbers are omitted in this
manual.
16.3 Register Descriptions
2
The I C bus interface has the following registers. For details on register addresses and register
states during each processing, refer to appendix A, Internal I/O Register.
• I
2
C bus control register A_0 (ICCRA_0)
• I
2
C bus control register B_0 (ICCRB_0)
• I
2
C bus mode register_0 (ICMR_0)
• I
2
C bus interrupt enable register_0 (ICIER_0)
Vcc Vcc
SCL
SDA
SCL in
out
SDA in
out
(Slave 1)
I/O
I/O
I/O
I/O
I/O
SCL in
out
SDA in
out
(Slave 2)
2
C bus interface.
Function
IIC2_0 serial clock input/output
IIC2_0 serial data input/output
IIC2_1 serial clock input/output
IIC2_1 serial data input/output
Rev. 1.0, 09/01, page 709 of 904
SCL
SDA