Figure 8 display the highlighted 9 pin connector J304 on bottom side of SoM_IoT_2V0 printed circuit board. This connector allocate the large-scale integrated circuit R-IN32M3-EC with external SPI and additional Timer Array Unit signals.
Pin 19 (TAUJ2_CH0)
Pin 20
Pin 21
Pin 22
Pin 23
Pin 24
Pin 25
Pin 26
Pin 27