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CANFDWIFI-100U
Single-channel CAN (FD) to WIFI converter
4.6 Ethernet Interface
The device provides one Ethernet interface. The physical form of the interface is
RJ45, which realizes the communication between the device and the PC. Table 4.4 lists
the interface definition.
Type
RJ45 terminal
4.7 CAN Bus Connection
The physical layer mainly transmits inter-device signals, converts various information
into transmittable physical signals (usually electrical or optical signals), and transmits
these signals to other target devices. For this purpose, CAN-bus has made detailed
regulations on signal levels, cables and connectors used for communication.
Two standards are released after CAN-bus was standardized by ISO, namely
ISO11898-2 (125kbps-1Mbps high-speed communication standard) and ISO11898-3
(low-speed communication standard less than 125 kbps).
The CAN transceiver determines the bus level based on the voltage difference
between the two cables. This transmission method is called differential transmission.
There are only two possibilities for the level signal transmitted on the cable, namely the
dominant level and the recessive level. The dominant level indicates logic 0, and the
recessive level indicates logic 1. Table 4.5 lists the high-speed CAN electrical
characteristics.
parameter
Communication baud rate
Number of nodes
Dominant level (logic 0)
Recessive level (logic 1)
Differential level
7: CAN_H
9: V-
Table 4.4 Ethernet interface
Schematic Diagram
Table 4.5 CAN-Bus interface specifications
Minimu
CANH
CANL
CANH
CANL
Dominant (logic 0)
©2021 Guangzhou ZLG Microelectronics Technology Corp.,Ltd.
9
CAN data sending and
receiving differential positive
phase signal
Power input negative
Typical
Maximu
m
value
m
40k
5M
110
2.75
3.5
4.5
0.5
1.5
2
2
2.5
3
2
2.5
3
1.2
2
3.1
User Manual
Unit
bps
pcs
V
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