Figure 4 display the highlighted 9 pin connector J302 on bottom side of SoM_IoT_1V2 printed circuit board. This connector allocate the large-scale integrated circuit With further development of Intelligent RJ45 Module, the SoM_iRJ45 supports additionally two CANopen ports. Both ports just offer the transceiver (TX) and receiver (RX) signals per port. For complete CAN connection, additional components are required. Following Figure 4 give an overview about the connection pins of J302. Subsequently all 9 pins will be described.
Pin 10 (P1ACT) offers ethernet port 1 activity indicator signal associated with R-IN32M3-EC with external SPI and additional SYNC signals. Furthermore the power supply pins VCC33 and GROUND are connected on J202.
Pin 1 (VCC33) and pin 2 (GND) should be connect Port RP04.
Pin 11 (P1LINK) offers ethernet port 1 link indicator signal and is connected with CATLINK1 signal for EtherCAT confirm indication requirements. This signals are associated with R-IN32M3-EC Port P05 and P07.
Pin 12 (P0ACT) offers ethernet port 0 activity indicator signal associated with R-IN32M3-EC Port RP02.
Pin 13 (P0LINK) offers ethernet port 0 link indicator signal and is connected with CATLINK0 signal for EtherCAT confirm indication requirements. This signals are associated with R-IN32M3-EC Port P04 and P06.
Pin 14 (VCC33) can be optional connected with external DC voltage source. The SoM_iRJ45 is specified for an input voltage range of 3,0V 15V DC to 3,6V 45V DC.
Note: Higher voltage (above 3.6V DC) at power supply pins may cause damage this module!
Pin 3 has chip select (CS) function for 15 (GPIO0) is directly connected with R-IN32M3-EC Clocked Serial Interface H (CSIH) which works in Slave Mode at CSIH channel 0. The used chip select sink for this R-IN32M3-EC based module is Port P70, Port P71 drives permanently to GND level.Pin 4 connect the RESETZ ball of Port 5 Pin P53
Pin 16 (GPIO1) is directly connected with R-IN32M3-EC. So an external reset signal can initialize the CPU core and the internal peripheral modules.
Pin 5 complies the MISO function for SPI connection. This pin connect the R-IN32M3-EC CSIH serial data output signal at Port P47 (CSISO0).
Pin 6 complies the MOSI function for SPI connection. This pin connect the Port 5 Pin P54
Pin 17 (GPIO2) is directly connected with R-IN32M3-EC CSIH serial data input signal at Port P46 (CSISI0).
Pin 7 complies the SCK function for SPI connection. This channel 0 CSIH signal connect the serial clock of R-IN32M3-EC at Port P45.
Pin 8 (CATSYNC0) connect Port P11 of R-IN32M3-EC and is able to use as GPIO or EtherCAT Sync0 signal connection.
Pin 9 (CATSYNC1) connect Port P10 of R-IN32M3-EC and is able to use as GPIO or EtherCAT Sync1 signal connection.. Port 5 Pin P55
Pin 18 (GPIO3) is directly connected with R-IN32M3-EC. Port 5 Pin P56
Exemplary indicator signal connection for Link and Activity
The 4 defined indicator signals of J302 pin 10 to 13 are recommended to connect similar to the following Schematic 1. The value of resistance depends on used LED which are integrated in your Ethernet connector.
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