R-IN32M4-CL3 User's Manual: Board design edition
12. I2C Connection Pins
R18UZ0074EJ0100
Page 47 of 61
Dec 24, 2019
12.
I
2
C Connection Pins
Figure 12.1 shows a connection example between the R-IN32M4-CL3 and the I
2
C slave device.
Since the serial clock line and serial data line are N-channel open drain outputs, an external pull-up resistor is required.
R-IN32M4-CL3
Clock output
VDD33 (3.3 V)
SCLn
(Clock input)
Data output
Data input
(Clock output)
Slave device
Clock input
Data output
Data input
SCLn
SDAn
SDAn
RP00(SCL1)/P60(SCL0)
RP01(SDA1)/P61(SDA0)
VDD33 (3.3 V)
Figure 12.1 Connection Example between R-IN32M4-CL3 and I
2
C Slave Device
Remark:
n = 0
–3
