Figure 8 display the highlighted 9 pin connector J304 on bottom side of SoM_IoT_1V2 printed circuit board. This connector allocate the large-scale integrated circuit R-IN32M3-EC with external SPI and additional SYNC signals. Furthermore the power supply pins VCC33 and GROUND are connected on J202.
Pin 19
Pin 20
Pin 21
Pin 22
Pin 23
Pin 24
Pin 25
Pin 26
Pin 27