E a s y M x
P R O
v 7 a
U s e r M a n u a l
P A G E 25
Controller Area Network (CAN or CAN
bus) is a vehicle bus standard designed
to allow microcontrollers and devices
to communicate with each other within
a vehicle without a host computer. CAN
is a message-based protocol, designed
specifically for automotive applications
but now also used in other areas such
as industrial automation and medical
equipment. EasyMx PRO v7a is equipped
with
SN65HVD230
– a 3.3V CAN
Transceiver and a pair of screw terminals
which provide microcontrollers with
integrated CAN controller with the
necessary physical interface for CAN
communication. Make sure to correctly
connect negative and positive differential
communication lines before using this
module.
VCC-3.3V
R57 10
CN28
CANH
CANL
TX-CAN
RX-CAN
1
2
3
5
4
6
7
8
D
GND
Vdd
R
Vref
CANL
CANH
Rs
U7
SN65HVD230
1
2
3
4
5
6
7
8
O
N
SW12
PD0
PD1
DATA BUS
Enabling CAN
CAN connection schematics
CAN
communication
In order to enable CAN communi
-
cation, you must push
SW12.5
(PD1) and
SW12.6
(PD0) to
ON
position. This connects the
TX
and
RX
lines to appropriate
microcontroller pins and its CAN
module.
