User`s guide

page 27
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 specically for automotive
applications but now also used in other
areas such as industrial automation and
medical equipment. EasyMx PRO
™
v7 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
dierencial communication lines before
using this module.
1 2 3 4 5
6
7 8
O
N
SW10
TX-CAN
RX-CAN
PD1
PD0
DATA BUS
C34
100nF
VCC-3.3V
VCC-3.3V
R47 10
CANH
CANL
1
2
3
54
6
7
8
D
GND
Vdd
R Vref
CANL
CANH
Rs
U6
SN65HVD230
CN13
CAN COMM.
TX-CAN
RX-CAN
Enabling CAN
Figure 13-1: CAN connection schematics
CAN
communication
EasyMx PRO
v7
communication
In order to enable CAN communi-
cation, you must push SW10.5
(PD1) and SW10.6 (PD0) to
ON position. This connects the
TX and RX lines to appropriate
microcontroller pins and its CAN
module.
Figure 13-2:
enabling
CAN
communica-
tion