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CANDTU-200UWGR
CAN Bus Message Recording and Wireless Data Transmission Equipment User Manual
parameter
Communication baud rate
Number of nodes
Dominant level (logic 0)
Recessive level (logic 1)
Differential level
Maximum withstand
voltage of the bus pin
Instantaneous voltage of
the bus
Isolation voltage (DC)
Figure 3. 4 High-speed CAN typical network connection
The CAN bus adopts balanced transmission. ISO11898-2 stipulates: In the
high-speed CAN, a 120 ohm terminal resistor needs to be connected to the network
terminal node to eliminate signal reflection on the bus and avoid signal distortion. Figure
3.4 shows the high-speed CAN network topology.
The device has a built-in 120 ohm terminal resistance, which can be configured to
turn on or off by using the configuration tool CANDTU. For operation details, see 4.2.1.
Note: The bus communication distance and communication rate are related to the field application and
can be designed according to the actual application and related standards. The CAN-Bus cable can use
ordinary twisted pair, shielded twisted pair or standard bus communication cable. In long-distance
communication, the terminal resistance value needs to be selected according to the communication
distance, cable impedance and number of nodes.
3.3.5
LIN-Bus Interface
The device provides one independent LIN-Bus interface. The physical form of the
interface is a flange terminal. Table 3.9, Table 3.10, and Table 3.11 list the interface
diagrams, signal definitions,
See Table 3.14, Table 3.15, and Table 3.16.
Table 3.13 CAN-Bus Interface Specifications
Minimu
CANH
CANL
CANH
CANL
Dominant (logic 0)
Recessive (logic 1)
©2021 Guangzhou ZLG Microelectronics Technology Corp.,Ltd.
12
Typical
Maximu
m
value
m
5k
1M
110
2.75
3.5
4.5
0.5
1.5
2
2.5
2
2.5
1.2
2
3.1
-0.5
0
0.05
-18
18
-100
+100
3500
User Manual
Unit
bps
pcs
2
3
3
V
V
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