Cartft FLEETPC-ARM-300 Series Reference Manual page 24

2x CAN2.0B bus interfaces, 2x COM port (RS232/ RS485), I
available on the IO1 connector. On the standard FLEETPC-ARM-300 hardware, COM2 is
configured as RS232 and COM3 is configured as RS485 port. Both COM2 and COM3 can
be configured as either RS232 or RS485 port (on ordering FLEETPC-ARM-300 products).
Functions Pin
1
CAN1
2
3
CAN2
4
COM2 6
(RS232) 7
COM3 8
(RS485) 9
11
2
I C Bus
12
13
PWR
14
All manuals and user guides at all-guides.com
Linux
Signals
Device
CAN1H
can0
CAN1L
CAN2H
can1
CAN2L
TXD
/dev/ttymxc1
RXD
485-
/dev/ttymxc2
485+
SCL
--
SDA
3.3V/5V --
Page 24
FLEETPC-ARM-300 Series
JP4 pin1
JP5 pin1
2
C bus and power pins are
Notes
CAN 2.0B protocol
CAN 2.0B protocol
COM2_TXD = 485-
COM2_RXD = 485+
COM3_RXD = 485-
COM3_TXD = 485+
--
3.3V/5V configured
by JP4 and JP5
(default +5V)
Isolation
Y
Y
Y
Y
(option)
Y