J303 SoM_IoT_2V0

Owned by Steffen Schröder
Last updated: Mar 04, 2022
2 min read

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.

 

Figure 9: SoM_IoT_2V0 J303

 

Pin 28 (I2C_SDA1) This pin is used for serial data input and output. This pin is an N-ch open-drain output for both master and slave devices on real time port RP01 of R-IN32M3-EC realized. For Functional Overview see also User’s Manual R18UZ0007EJ1100 chapter 18 I2C BUS (IICB)

Note: Because the outputs of the serial clock line and serial data bus line are N-ch open-drain outputs, an external pull-up resistor must be connected to these lines

 

Pin 29 (I2C_SCL1) This pin is used for serial clock input and output. This pin is an N-ch open-drain output for both master and slave devices on real time port RP00 of R-IN32M3-EC realized.

 

Pin 30 (UART_RXD0) Receive data input on port P20 of R-IN32M3-EC (URTJ0TRXD). For Interrupts and peripheral modules see also User’s Manual R18UZ0007EJ1100 chapter 16 Asynchronous Serial Interface J (UARTJ)

 

Pin 31 (UART_TXD0) Transmit data output on port P21 of R-IN32M3-EC (URTJ0TTXD).

 

Pin 32 (UART_RTS0) optional Ready To Send on port P43 of R-IN32M3-EC.

 

Pin 33 (GND) optional Ground

 

Pin 34 (UART_RXD1) Receive data input on port P30 of R-IN32M3-EC (URTJ1TRXD).

 

Pin 35 (UART_TXD1) Transmit data output on port P31 of R-IN32M3-EC (URTJ1TTXD).

 

Pin 36 (UART_RTS1) optional Ready To Send on port P74 of R-IN32M3-EC.