SoM-112ES User Manual
Revision 1.00 © 2018
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Table 7: Serial Port COM E (JK4)
Pin
Micro USB B 2.0 Connector: Description
1
PWR
2
DM (Data -)
3
DP (Data +)
4
NC
5
GND
2.6
USB
The SoM-112ES provides for 1x dual USB 2.0 Type A host ports (USB PortA1 & A2), 1x single USB 2.0
Type A host port (USB Port B), and 1x single USB Type B device port (USB Port C). Ports A1 & A2 are
provided via a USB Switch. USB HOST Port B and USB Device Port C are both provided directly from the
SOM.
The USB host ports are fused with automatically resettable Polyfuses. If a USB device tries to draw more
than 500 milliamps, the fuses will open. Once the drawing source is removed the fuses will automatically
reset.
Note: When sizing a power supply, make sure to allow for USB Device consumption. A device can
potentially draw 500mA, therefore these devices could use a total of up to 1.5 amp of power. USB ports
must be supported by the SoM for the ports to operate.
A Micro USB Connector is provided as the system serial console (COM E). This makes it easier for
modern day computers that are not equipped with a standard serial port to establish a console port
connection.
2.7
CAN Port
The SoM-112ES provides a CAN 2.0 port utilizing the TI SN65HVD232 CAN Transceiver chip. Note, the
CAN controller must be supported by the SOM in order to have CAN functionality. The CAN port is
accessible via a 3-pin header (CN2).
Table 7: Pin-out for CAN 2.0 (CN2)
Pin
Signal
Pin 1
GND
Pin 2
CAN_L
Pin 3
CAN_H
2.8
MicroSD Card Socket
The SoM-112ES provides a high capacity MicroSD socket. This socket is hot-swappable and can accept a
wide variety of Flash Cards. The MicroSD card is serviced through a USB bridge device as the native SoM
SDIO port is dedicated to the Wireless module. A Red activity LED (LD3) will be lit when the Flash card is
accessed and the card should not be removed at this time. A card that is written to by the SoM-112ES
