SOM-9X20 User Manual
25
A.3.15. I
2
C Connector
The SOMDB2 carrier board comes with two I²C connectors which are for connecting to the I²C devices, (for light
& proximity sensor and NFC module). The pin headers are labeled as “NFC” and “PS1“. The pinouts of the pin
headers are shown below.
Table 12: I
2
C connector (for light & proximity sensor) pinouts
Table 13: I
2
C connector (for NFC module) pinouts
Pin
Signal
1
GND
2
NFC_VDD_IO
3
VDD3V3
4 N/A
5
NFC_DWL_REQ_3V3
6
NFC_VEN_3V3
7
GND
8
NFC_12C_SCL_3V3
9
NFC_12C_SDA_3V3
10 GND
11 NFC_IRO_3V3
12 N/A
13 N/A
14 GND
15 VDD3V3
1 2 3 4
ON DIP
1
NFC
1
Pin
Signal
1
GND
2
PS_I2C_SCL_1V8
3
PS_I2C_SDA_1V8
4 INT_PS_1V8
5
VDD3V3
6
VDD3V3
1 2 3 4
ON DIP
1
PS1
1
Figure 28: I
2
C connector (for light & proximity sensor) diagram
Figure 29: I
2
C connector (for NFC module) diagram
