μ
Q7-962
μ
Q7-962 User Manual - Rev. First Edition: 1.0 - Last Edition: 3.1 - Author: S.B. - Reviewed by P.Z Copyright © 2016 SECO S.r.l.
34
3.2.1.12
CAN interface signals
Since i.MX6 processor includes a Flexible Controller Area Network (FlexCAN), the
μ
Q7-962 module can also offer a CAN interface.
This interface is compliant to CAN specifications rel. 2.0 part B.
CAN0_TX: CAN Transmit Output for CAN Bus Channel 0. +3.3V_S electrical voltage level signal.
CAN0_RX: CAN Receive Input for CAN Bus Channel 0. +3.3V_S electrical voltage level signal.
Please consider that it is not possible to connect Qseven
®
CAN interface to any CAN Bus directly, it is necessary to integrate a CAN Bus Transceiver in the Carrier
board.
The following schematic shows an example of such an implementation: in there, the CAN Bus connection is made through a DB9 connector, with standard DB-9
CAN pinout, where also external battery voltage is connected (+12V
DC
batteries are considered as a referral for capacitor C1 sizing). 120
Ω
resistor is placed for line
termination, in case that the system is placed to one of the two extremities of CAN Line. If this termination is necessary, simply plug a jumper in position J1.
P1
DB9 CONNECTOR
5
9
4
8
3
7
2
6
1
10
11
C1
CC-4.7uF/25V
CAN_HI
CAN_LO
U2
SN65HVD232D
CANH
7
CANL
6
NC
8
D
1
R
4
NC
5
GND
2
VCC
3
R1
R-120
J1
JUMPER
1
2
+3.3V_S
CAN0_TX
CAN0_RX
CAN_HI
EXT_VBAT
