Datasheet

UniPi
I
2
C ports
Raspberry Pi has two I
2
C interfaces. The I
2
C _1 of the RPi is connected via the main P1 connector and
does not need any special modification. All the onboard ICs are connected to this bus. The second I
2
C
bus, I
2
C_0, is wired out via the P5 connector which needs to be soldered from the bottom of the
Raspberry Pi. Please check our online tutorial for further information.
The I
2
C _1 is by default wired out via the onboard RJ11 connector labeled I
2
C and features ESD
protection. UniPi also features optional I2C port (labeled I
2
C_1) on the edge of the board but does
not have any connector by default.
Please note that the I
2
C_0 has been reserved for special purpose starting with RPi models + and thus
is no longer recommended to use.
1
Table 7 - I
2
C RJ11 connector
RJ11 pin
Function
1
-
2
5V
3
I2C data (SDA)
4
I2C clock (SCL)
5
GND
6
-
WWW.UNIPI.TECHNOLOGY 9 REV 1.1