Seco Smarc CSM-B79 User Manual page 66

3.3.19 CAN ports
®
According to SMARC Rel. 2.1.1 specification, SMARC
corresponding CAN output interfaces are available on two dedicated 3-pin PCB terminal blocks, type Phoenix Contact P/N MKDSFW 1,5/ 3-3,5
equivalent, particluar suited for this kind of application.
CAN Port #0 Connector CN65
Pin Signal
1 CAN0_H
2 GND
3 CAN0_L
JP12 position CAN #0 120Ohm termination
Not Inserted No termination
Inserted Termination placed
3.3.20 USB Debug Connector
For Debug Purposes, it is present an USB-to-Serial Bridge, connected to SMARC
on an USB micro-B connector, CN73, type Molex p/n 105017000, with standard pinout for USB 2.0 device connections.
Since SER#1 port can also be connected to the feature header described at par.3.3.26, an on-board dual DIP switch SW7 allows selecting if SER#1 port is used
to manage the USB Debug Port or is redirected to the feature header connector.
Debug USB micro-B CN73
Pin Signal
1 +5V_VBUS
2 USB_DBG-
3 USB_DBG+
4 --
5 GND
CSM-B79
CSM-B79 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: A.R - Reviewed by S.R. - Copyright © 2021 SECO S.p.A.
®
modules foresee two CAN bus interfaces.The CSM-B79 carrier board include two dedicated transceivers,
CAN Port #1 Connector CN66
Pin Signal
1 CAN1_H
2 GND
3 CAN1_L
JP13 position
Not Inserted
Inserted
Signal description:
USB_DBG+ / USB_DBG-: Debug USB Port differential pair
+5V_VBUS: USB voltage rail
SW7 Switch ON Position
1 3 SER#1 on USB Debug connector CN73
2 4
Signals Description:
CANx_H: High-Level CAN bus line
CANx_L: Low-Level CAN bus line
CAN #1 120Ohm termination
No termination
Termination placed
®
#1, also available on feature header). External interface is available
SER#1 on Feature Header CN45
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For each interface, by using a 2-way jumper
between CANx_H and CANx_L lines
OFF Position
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1868131 or
66