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Following Figure 1 shows the Intelligent RJ45 Module in SoM_IoT_1V2 variant at bottom side. There are three 9 pin multipoint connectors readily identifiable.

...

Connector

Pin

Signal

Function

J202

(blue)

1

VCC33

3.3V DC Power supply

2

GND

3

CS

Serial Peripheral Interface (R-IN32M3-EC specific Clocked Serial Interface H)

4

RESET

5

MISO

6

MOSI

7

SCK

8

CATSYNC0

EtherCAT SYNC

9

CATSYNC1

J302

(orange)

10

P1ACT

Ethernet Port 1 Indicator signals for connection with LED cathode (Link/Activity)

11

P1LINK

12

P0ACT

Ethernet Port 0 Indicator signals for connection with LED cathode (Link/Activity)

13

P0LINK

14

VCC33

Optional 3.3V DC connection

15

GPIO0

Port 5 Pin P53 see also User’s Manual R18UZ0003EJ0401 section 2.1.5

16

GPIO1

Port 5 Pin P54 see also User’s Manual R18UZ0003EJ0401 section 2.1.5

17

GPIO2

Port 5 Pin P55 see also User’s Manual R18UZ0003EJ0401 section 2.1.5

18

GPIO3

Port 5 Pin P56 see also User’s Manual R18UZ0003EJ0401 section 2.1.

...

5

J301

(yellow)

19

RX0_N

Ethernet Port 0 Differential Pairs

20

RX0_P

21

TX0_N

22

TX0_P

23

SHIELD

Virtual ground for SHIELD connection only

24

RX1_N

Ethernet Port 1 Differential Pairs

25

RX1_P

26

TX1_N

27

TX1_P