4 can bus, 1 j15 – can0, 2 j16 – can1 – Kontron SMARC Evaluation Carrier User Manual
Page 21: 5 asynchronous serial ports, 1 general, Can bus, J15 – can0, J16 – can1, Asynchronous serial ports, General
User’s Guide
21
5.4
CAN Bus
5.4.1 J15 – CAN0
Connector: Molex 53261-0471, 1.25mm pitch R/A Header.
Pin Number
Signal
Notes
1
CAN 0 Dominant Low
2
CAN0 Dominant High
3
5V power
4
Ground
5.4.2 J16 – CAN1
Connector: Molex 53261-0471, 1.25mm pitch R/A Header.
Pin Number
Signal
Notes
1
CAN1 Dominant Low
2
CAN1 Dominant High
3
5V power
4
Ground
5.5
Asynchronous Serial Ports
5.5.1 General
The SMARC Evaluation Carrier supports the four serial ports defined in the SMARC specification. The Evaluation
Carrier has EIA RS232 compliant signal levels and polarities. Per the SMARC specification, two of the four ports have
RTS / CTS handshaking, and two have TX and RX data only, without handshaking.
The Evaluation Carrier runs SER0 and SER1 through one transceiver, and SER2 and SER3 through a 2
nd
transceiver. There
are provisions that allow I/O Mezzanine card circuitry to disable the SER0/1 transceiver, and / or disable the SER2/3
transceiver. These provisions exist so that users may optionally take over SER0/1 or SER2/3 and use them in alternative
ways on the I/O Mezzanine (to interface to a peripheral such as a GPS module or an RS485 transceiver).