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Figure 9 display the highlighted 9 pin connector J303 on bottom side of SoM_IoT_2V0 printed circuit board. This connector allocate the large-scale integrated circuit R-IN32M3-EC with external I2C and two additional UART signals.

Pin 28 (I2C_SDA1)

Pin 29 (I2C_SCL1)

Pin 30 (UART_RXD0)

Pin 31 (UART_TXD0)

Pin 32 (UART_RTS0)

Pin 33 (GND) Ground

Pin 34 (UART_RXD1)

Pin 35 (UART_TXD1)

Pin 36 (UART_RTS1)

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