Enhanced Controller Area Network (eCAN)
13 - 26 C2000 Microcontroller Workshop - Communications
CAN Bus and Node
CAN Bus
Two wire differential bus (usually twisted pair)
Max. bus length depend on transmission rate
40 meters @ 1 Mbps
CAN
NODE B
CAN
NODE A
CAN
NODE C
CAN_H
CAN_L
120Ω
120Ω
The MCU communicates to the CAN Bus using a transceiver. The CAN bus is a twisted pair
wire and the transmission rate depends on the bus length. If the bus is less than 40 meters the
transmission rate is capable up to 1 Mbit/second.
CAN Node
Wired-AND Bus Connection
RXTX
CAN Controller
(e.g. TMS320F28035)
CAN_L
CAN_H
120Ω
120Ω
CAN Transceiver
(e.g. TI SN65HVD23x)
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